LTC News

16-Bit Quad, SPI DAC with Internal Reference Achieves ±4LSB INL (Max)

Wed, 10 Mar 2010 16:12:20 -0500

MILPITAS, CA — March 10, 2010 — Linear Technology Corporation introduces the LTC2654, a quad voltage output 16- and 12-bit digital-to-analog converter (DAC family) with internal reference and SPI interface. LTC2654 DACs achieve 16-bit performance of ±4LSB INL maximum over temperature, a factor of two better than the nearest 16-bit quad competitor with internal reference. LTC2654 has the lowest offset error ±2mV (max) and lowest gain error 0.1% (max), a combination that ensures that the LTC2654 remains accurate near the supply rails and provides users with a wider effective output range. LTC2654's precision specifications make it ideal for multichannel, open loop and closed loop systems. Applications include mobile communication, process control and industrial automation, automated test equipment (ATE) and automotive systems.

60V Input Dual Output Synchronous Step-Down DC/DC Controller Draws Only 50µA in Battery-Powered Systems

Mon, 08 Mar 2010 11:53:56 -0500

MILPITAS, CA — March 8, 2010 — Linear Technology Corporation introduces the LTC3890/-1, a high voltage dual output synchronous step-down DC/DC controller that draws only 50µA when one output is active and 60µA when both outputs are enabled. With both outputs shut down, the LTC3890/-1 draws a mere 14µA. The 4V to 60V input supply range is designed to protect against high voltage transients, continue operation during automotive cold crank and cover a broad range of input sources and battery chemistries. Each output can be set from 0.8V to 24V at output currents up to 20 amps with efficiencies as high as 95%, making it well suited for 12V or 24V automotive, heavy equipment, industrial control, robotics and telecom applications.

Programmable 2A 2-Cell Supercap Charger with Automatic Cell Balancing in a Compact 9mm2 Package

Thu, 04 Mar 2010 14:13:54 -0500

MILPITAS, CA — March 4, 2010 — Linear Technology Corporation introduces the LTC4425, the latest in a family of 2-cell supercapacitor chargers for addressing high peak power, data backup and “dying gasp” needs in portable and data storage applications. The device employs a linear CC-CV architecture with thermal limiting to charge two supercapacitors in series to a programmable output voltage from a Li-Ion/Polymer battery, a USB port, or other 2.7V to 5.5V current-limited supply.

I2C Battery Gas Gauges for Single Li-Ion Cells Offers 1% Accuracy

Tue, 02 Mar 2010 12:13:27 -0500

MILPITAS, CA — March 2, 2010 — Linear Technology Corporation introduces the LTC2941/LTC2942 battery gas gauges with an I2C interface for 2.7V to 5.5V systems. Unlike most coulomb counters that infer charge by sampling the current and integrating digitally, the LTC2941/LTC2942 use a continuous-time analog integrator to measure charge directly, resulting in minimal offset and gain error and better overall charge accuracy. The LTC2941 measures the charge flowing in and out of a battery to within 1% accuracy at room temperature. The LTC2942 does the same while also incorporating a 14-bit No Latency Δ∑ ADC to measure battery voltage and die temperature to within 1.3% and ±5°C accuracy, respectively.

Dual Positive/Negative ±20VIN ±150mA LDO Offers 20µVRMS Noise

Wed, 24 Feb 2010 12:23:03 -0500

MILPITAS, CA — February 24, 2010 — Linear Technology Corporation announces the LT3032, a dual, low noise, positive/negative low dropout voltage linear regulator. The device delivers up to ±150mA continuous output current on each channel with a 300mV dropout voltage at full load. The LT3032 features a wide input voltage range of ±2.3V to ±20V, delivering adjustable output voltages from ±1.22V to ±20V. A single capacitor provides ultralow noise operation only 20µVRMS across a wide bandwidth of 10Hz to 100kHz for the positive output rail, and only 30µVRMS for the negative rail. The LT3032's output voltage tolerance is highly accurate at ±3% over line, load and temperature. The device's wide input and output voltage ranges, fast transient response and low quiescent current of 30µA per channel (operating) and <3µA in shutdown (total) make it an excellent choice for portable battery-powered systems that require optimum run time, and for use in bipolar op amp/instrumentation power supply and low noise supply applications.

38VIN Dual Synchronous Step-Down DC/DC Controller with 1% Accurate Pin-Selectable Output Voltages

Tue, 23 Feb 2010 12:11:51 -0500

MILPITAS, CA — February 23, 2010 — Linear Technology Corporation announces the LTC3865/-1, a 95% efficient, dual output synchronous step-down DC/DC controller with 2-pin selectable VOUT programming, a feature that saves 4 precision feedback resistors. The output voltages maintain a tight ±1% accuracy including initial set-point, a -40°C to 125°C operating temperature range and load/line regulation. Nine selectable output voltages ranging from 0.6V to 5V are possible. The 4.5V to 38V input voltage range encompasses a wide variety of applications including most intermediate bus voltages and battery chemistries. The strong on-board N-channel MOSFET driver enables the use of high power external MOSFETs to produce output currents as high as 20A. Applications include point-of-load regulators in medical, industrial, automotive, datacom, telecom and multifunction printers.

4% Accurate Programmable Average Input Current Limit Buck-Boost DC/DC Converter Delivers Maximum Current from Limited Power Sources for High Peak Power Applications

Thu, 18 Feb 2010 13:00:32 -0500

MILPITAS, CA - February 18, 2010 - Linear Technology announces the LTC3127, a 96% efficient, synchronous buck-boost converter that delivers up to 1A of output current to a regulated output voltage with inputs above, below or equal to the output. The LTC3127 features a ±4% accurate programmable average input current limit with a 200mA to 1000mA range, making it ideal for GSM modems or Supercapacitor chargers powered from sources with hard limits on output current. This enables system designers to maximize the current draw from a limited power source, significantly improving data rates or charging times. The LTC3127's input range of 1.8V to 5.5V and output range of 1.8V to 5.25V is compatible with all types of PC card slots, USB and single-cell Li-Ion or dual/triple-cell alkaline/NiCd/NiMH applications. The LTC3127's current mode Buck-Boost topology provides a continuous transfer mode through all operating modes a simplifying design, and ensuring excellent performance. The LTC3127's constant 1.35MHz switching frequency offers low noise operation while minimizing the size of the few required external components. The combination of tiny externals and a 3mm x 3mm DFN or MSOP-12 package provides a highly compact solution footprint for space-limited applications.

Dual Output, Multiphase Step-Down DC/DC Controller Operates with Power Blocks & DrMOS Devices

Wed, 17 Feb 2010 12:04:01 -0500

MILPITAS, CA - February 17, 2010 - Linear Technology Corporation introduces the LTC3860, a dual output synchronous step-down DC/DC controller with multiphase operation, differential output voltage sensing and high frequency operation. This controller works in conjunction with external power train devices such as Power Blocks and DrMOS, as well as discrete N-channel MOSFETs and associated gate drivers, enabling flexible design configurations. Up to 12 phases can be paralleled and clocked out-of-phase to minimize input and output filtering for very high current requirements (up to 300A). Applications include high current power distribution and industrial systems, DSP and ASIC supplies.

Tiny Sub-1µA IQ Shunt Battery System Charges & Protects Li-Ion/Polymer Batteries

Tue, 16 Feb 2010 13:16:03 -0500

MILPITAS, CA - February 16, 2010 - Linear Technology Corporation introduces the LTC4070, an easy-to-use, tiny shunt battery charger system IC for Li-Ion/Polymer batteries. The LTC4070, with its 450nA operating current, charges and protects batteries from previously unusable very low current, intermittent or continuous charging sources. The LTC4070's charge current may be boosted from 50mA up to 500mA with the addition of an external PMOS shunt device. An internal thermal battery conditioner reduces the float voltage to protect Li-Ion/Polymer cells at elevated battery temperatures. Multiple-cell battery stacks can be charged and balanced by configuring several LTC4070s in series. Housed in a low profile (0.75mm) 8-lead 2mm x 3mm DFN package, the LTC4070 provides a complete and ultra-compact charger solution with only a single external resistor required in series with the input voltage. The device's feature set is well suited for continuous and intermittent, lower power charging source applications, including Lithium-Ion/Polymer battery backup, thin film batteries, coin cell batteries, memory backup, solar-powered systems with backup, embedded automotive and energy scavenging/harvesting.

15V, 4MHz, Synchronous Dual 3A Step-Down Regulator in a 4mm x 5mm QFN

Wed, 10 Feb 2010 17:55:37 -0500

MILPITAS, CA - February 10, 2010 - The LTC3633 is a high efficiency, 4MHz synchronous dual output buck regulator that incorporates a unique constant frequency/controlled on-time, current mode architecture. It can deliver up to 3A of continuous output current from each channel at output voltages as low as 0.6V from a 4mm x 5mm QFN package. The LTC3633 operates from an input voltage of 3.6V to 15V, making it ideal for dual-cell Li-Ion applications as well as 5V and 12V intermediate bus systems. Its switching frequency is user programmable from 800kHz to 4MHz, enabling the use of tiny, low cost capacitors and inductors.

Dual 500mA Linear LDO Regulator with Independent Inputs Offers Ultralow Noise

Tue, 09 Feb 2010 14:13:55 -0500

MILPITAS, CA - February 9, 2010 - Linear Technology Corporation announces the LT3029, a dual low noise, low dropout regulator with independent inputs and independent shutdown control for each channel. The device delivers up to 500mA per channel of continuous output current with a low dropout voltage of only 300mV at full load. The LT3029 features a wide input voltage range of 1.8V to 20V, delivering output voltages as low as 1.215V and up to 19.5V. The device features ultralow noise of only 20µVRMS across a wide bandwidth of 10Hz to 100kHz, and offers tracking/sequencing capability. Its full feature set and low quiescent current of 55µA per regulator (operating) and <1µA (in shutdown) make it an excellent choice for battery-powered "keep alive" systems that require optimum run time, in addition to microprocessor core logic supplies, tracking/sequencing supplies and general purpose voltage conversion.

Low Power Isolated Monolithic Flyback Switching Regulator Simplifies Design & Eliminates Optocoupler

Mon, 08 Feb 2010 13:28:14 -0500

MILPITAS, CA - February 8, 2010 - Linear Technology Corporation announces the LT3574, an isolated monolithic flyback switching regulator that significantly simplifies the design of a low power isolated DC/DC converter. No opto-isolator, third winding or signal transformer is required for feedback since the output voltage is sensed from the primary-side flyback signal. The LT3574 operates over a 3V to 40V input voltage range, has a 0.65A NPN power switch and can deliver up to 3 watts of output power, making it well suited for a wide variety of industrial, medical, telecom, datacom and automotive applications.

15V, 4MHz, Synchronous 2.5A Step-Down Regulator in a 3mm x 3mm QFN

Fri, 05 Feb 2010 09:03:43 -0500

MILPITAS, CA - February 4, 2010 - The LTC3604 is a high efficiency, 4MHz synchronous buck regulator that incorporates a unique constant frequency/controlled on-time, current mode architecture. It can deliver up to 2.5A of continuous output current at output voltages as low as 0.6V from a 3mm x 3mm QFN or MSOP-16E package. Its current mode operation offers excellent line and load transient response even with high step-down ratios. The LTC3604 operates from an input voltage of 3.6V to 15V, making it ideal for applications powered from dual-cell Li-Ion battery stacks as well as 5V and 12V intermediate bus systems. Its switching frequency is user programmable from 800kHz to 4MHz, enabling the use of tiny, low cost capacitors and inductors.

High Voltage, Low Quiescent Current Synchronous Step-Down DC/DC Controller Operates from -55°C to 125°C

Tue, 02 Feb 2010 15:56:54 -0500

MILPITAS, CA - February 2, 2010 - Linear Technology Corporation announces a new high reliability (MP) grade version of the LT3845, a 4V to 60V input voltage range, low quiescent current synchronous step-down DC/DC controller. Its Burst Mode® operation keeps quiescent current under 120µA in no load standby conditions, useful for extending run time in battery-powered applications. The device's powerful onboard N-channel MOSFET gate drivers provide output current up to 20 amps at efficiencies as high as 95%, making it ideal for 12V and 24V automotive systems, industrial controls, heavy equipment, avionics and military systems.

45V Input 100mA LDO Offers 30µVRMS Noise & Output Down to 0.6V

Mon, 01 Feb 2010 15:35:37 -0500

MILPITAS, CA - February 1, 2010 - Linear Technology Corporation announces the LT3060, a high voltage, low noise, low dropout voltage linear regulator. The IC delivers up to 100mA continuous output current with a 300mV dropout voltage at full load. The LT3060 features a wide input voltage range of 1.6V to 45V, delivering adjustable output voltages from 0.6V to 44.5V. A single capacitor provides both programmable ultra-low noise operation -- only 30µVRMS across a wide bandwidth of 10Hz to 100kHz — and reference soft start functionality, preventing output voltage overshoot at turn-on. The LT3060's output voltage tolerance is highly accurate at ±2% over line, load and temperature. The IC's wide input and output voltage ranges, fast transient response, low quiescent current of 40µA (operating) and <1µA (in shutdown) make it an excellent choice for portable battery-powered systems that require optimum run time, and usage in automotive, industrial and avionic power supply applications.

High Speed Synchronous N-Channel MOSFET Driver Has Powerful Gate Drive for High Efficiency Buck or Boost DC/DC Converters

Wed, 27 Jan 2010 11:43:21 -0500

MILPITAS, CA - January 27, 2010 - Linear Technology Corporation introduces the LTC4449, a high speed synchronous MOSFET driver designed to drive upper and lower power N-channel MOSFETs in a synchronous rectified converter topology. This driver, combined with one of Linear Technology's DC/DC controllers and power FETs forms a complete high efficiency synchronous regulator that can be used as a step-down or step-up DC/DC converter.

Rail-to-Rail Single-Ended to Differential Amplifier Drives High Speed 16- to 18-bit SAR ADCs

Mon, 25 Jan 2010 13:48:14 -0500

MILPITAS, CA - January 25, 2010 - Linear Technology introduces the LT6350, a 33MHz, low noise, rail-to-rail input and output ADC driver that settles to 16-bits in just 350ns. It is suitable for driving the latest highest performance SAR ADCs such as the LTC2393-16. The LT6350 incorporates two op amps and matched resistors to create a differential output from a single-ended high impedance input. As a result, a differential gain of 2 is achieved with no external feedback resistors, and higher gain can be obtained by using feedback resistors. Each of the two internal op amps achieve a low 1.9nV/√Hz input-referred noise density, resulting in a total output-referred noise of just 8.2nV/√Hz. The LT6350 enables high performance ADCs to achieve better than 110dB SNR over a 1MHz bandwidth.

35V Input (55V Transient), 2MHz Dual Channel Step-Down Regulator with Power-On Reset & Watchdog Timer

Thu, 21 Jan 2010 14:21:50 -0500

MILPITAS, CA - January 21, 2010 - Linear Technology Corporation announces the LT3640, a dual channel, current mode step-down switching regulator with a power-on reset and watchdog timer. Its 4V to 35V input voltage range with 55V transient ride through makes it ideal for load dump and cold crank conditions commonly found in automotive applications. The LT3640 uses a unique dual channel design with a high input voltage (4VIN to 35VIN, 55VIN transient) nonsynchronous channel that delivers 1.1A of output current, combined with a lower input voltage (2.5VIN to 5.5VIN) synchronous channel that provides up to 0.9A of continuous output current.

Dual Output, High Power 60V Synchronous Boost Controller Eliminates Heat Sink with 97% Efficiency

Wed, 20 Jan 2010 12:28:41 -0500

MILPITAS, CA - January 20, 2010 - Linear Technology Corporation announces the LTC3788/-1, a dual output, high power synchronous step-up switching DC/DC controller that replaces the boost diode with a high efficiency N-Channel MOSFET. This eliminates the heat sink normally required in medium to high power boost converters. The LTC3788/-1 can produce a 24V at 5A output with up to 97% efficiency, making it ideal for high power automotive audio amplifiers, industrial and medical applications where a step-up DC/DC converter must deliver high power with low heat dissipation in a small solution size.

18-Bit DAC Achieves ±1LSB INL & DNL

Tue, 19 Jan 2010 11:12:51 -0500

MILPITAS, CA - January 19, 2010 - Linear Technology Corporation introduces the LTC2757, the industry's first 18-bit digital-to-analog converter (DAC) to offer precision DC specifications of ±1LSB INL (max) and ±1LSB DNL (max). The LTC2757 is 18-bit accurate over a ±10V output range, offering a full-scale settling time of 2.1µs and low 1.4nV•s glitch impulse. Fast settling and low glitch reduce harmonic distortion, making it possible to produce higher frequency, lower noise output waveforms. This unique combination of DC and AC accuracy will enable the design of higher performance instrumentation, automated test equipment, data acquisition systems, and medical devices.

16-Bit, 1Msps SAR ADC Achieves 94dB SNR, Measures Wide ±4.096V Input Range

Thu, 14 Jan 2010 14:21:18 -0500

MILPITAS, CA - January 14, 2010 - Linear Technology Corporation introduces the LTC2393-16, a 16-bit SAR ADC that achieves an excellent 94dB SNR at sample rates up to 1Msps with no cycle latency. Operating from a single 5V supply and supporting a wide ±4.096V input range, the LTC2393-16 is well suited for many general purpose designs that require maximum signal swings to overcome background noise levels in demanding industrial environments.

Dual Isolated RS232 µModule Transceiver Integrates Isolated Power

Mon, 11 Jan 2010 12:05:59 -0500

MILPITAS, CA - January 11, 2010 - Linear Technology Corporation introduces the LTM2882, a 2-channel isolated RS232 µModule® transceiver that guards against large ground-to-ground differentials and common mode transients. In practical RS232 systems, ground potentials may vary widely from node to node, often exceeding the tolerable range, resulting in an interruption of communications or destruction of a transceiver. The LTM2882 breaks ground loops by isolating the logic level interface and line transceiver using internal inductive signal isolation. This allows for a much larger common mode voltage range plus superior common mode rejection >30kV/µs. A low EMI DC-DC converter generates the power supplies for driving RS232 levels and provides an additional isolated 5V supply output for powering any supporting external components. With 2,500VRMS of galvanic isolation, onboard secondary power and two fully compliant RS232 transmitters and receivers, the LTM2882 requires no external components, providing a complete, small µModule solution for isolated serial data communications.

Piezoelectric Energy Harvesting Power Supply

Thu, 07 Jan 2010 13:38:31 -0500

MILPITAS, CA - January 7, 2010 - Linear Technology announces the LTC3588-1, a complete energy harvesting solution optimized for low energy sources, including piezoelectric transducers. The LTC3588-1 integrates a low-loss, full-wave bridge rectifier with a high efficiency buck converter to harvest ambient vibrational energy via piezoelectric transducers and then convert it to a well-regulated output to power application microcontrollers, sensors, data converters and wireless transmission components. The LTC3588-1 operates from an input voltage range of 2.7V to 20V, making it ideal for a wide array of piezoelectric transducers, as well other high output impedance energy sources. Its high efficiency buck DC/DC converter delivers up to 100mA of continuous output current or even higher pulsed loads. Its output can be programmed to one of four (1.8V, 2.5V, 3.3V or 3.6V) fixed voltages to power a wireless transmitter or sensor. Quiescent current is only 950nA with the output in regulation (at no load), maximizing overall efficiency.

Drive up to Eight Channels of Ten 100mA LEDs with 3000:1 True Color PWM Dimming

Wed, 16 Dec 2009 11:24:41 -0500

MILPITAS, CA - December 16, 2009 - Linear Technology announces the LT3760, an 8-channel LED driver, utilizing a step-up DC/DC controller capable of driving up to a 45V string of 100mA LEDs per channel. Its internal 60V, 1MHz DC/DC boost mode controller is designed to operate as a constant current LED driver for up to 80 white LEDs. From a 12V input, the LT3760 can drive 8 channels, each with up to ten 100mA white LEDs in series while delivering efficiencies exceeding 92%. Its multichannel capability makes it ideal for medium and large-sized TFT-LCD backlighting applications. Its input voltage range of 6V to 40V makes it ideal for automotive, avionic, HDTV and industrial display applications.

Triple Output LED Driver Drives Up to 30 x 300mA LEDs & Offers 3000:1 True Color PWM Dimming

Tue, 15 Dec 2009 13:26:59 -0500

MILPITAS, CA - December 15, 2009 - Linear Technology Corporation announces the LT3492, a 2.1MHz DC/DC converter designed to operate as a three-channel constant current LED driver. Each of the LT3492's three channels can drive up to ten 300mA LEDs in series, enabling it to drive up to 30 x 300mA LEDs at efficiencies up to 96%. All three channels are operated by an independent True Color PWM™ signal, enabling each to be dimmed independently to ratios as high as 3,000:1. A fixed frequency, current mode architecture ensures stable operation over a wide range of supply and output voltages.

True Power & Current Monitor Enables Board & System-Level Optimization

Mon, 14 Dec 2009 13:45:50 -0500

MILPITAS, CA - December 14, 2009 - Linear Technology Corporation introduces the LT2940, a power and current monitor for 4V to 80V systems. The LT2940 provides the necessary circuits to accurately measure, monitor and control power in situations where both the current and voltage may vary due to supply voltage uncertainty, component parametric changes, transient conditions or time-varying signals. Unlike traditional power monitors that rely on data converters and multiplying registers to calculate power, the LT2940 uses a true four-quadrant analog multiplier that results in 5% power measurement accuracy and 3% current measurement accuracy, ensuring that boards and systems achieve optimum power efficiency and reliability. The LT2940 is suitable for use in line cards and servers, power-sense circuit breakers, power control loops and a wide variety of metering applications.

Battery Stack Fault Monitor Provides Independent Supervision of High Voltage Li-Ion Strings

Thu, 10 Dec 2009 12:31:47 -0500

MILPITAS, CA - December 10, 2009 - Linear Technology announces the LTC®6801, a high voltage battery stack fault monitor that operates without a microprocessor, and without the need for optocouplers or isolators. An LTC6801 can monitor up to 12 series-connected battery cells for overvoltage and undervoltage conditions. Multiple LTC6801 devices can be daisy chained, providing a method to monitor each individual cell in very long battery strings. When connected in a daisy-chain, a single differential clock output confirms that all cells in the stack are within the defined operating range. This clock interface provides high noise immunity and ensures that fault conditions are not hidden by frozen bits or short circuit conditions. The result is a reliable and simple design that can serve as a complete monitoring or redundant circuit. The LTC6801 is a low cost companion to the LTC6802 precision battery measurement and cell balancing IC, providing a backup circuit for hybrid electric battery packs, battery backup systems, and other high powered Li-Ion battery systems.

Quad 12-Bit/10-Bit/8-Bit Rail-to-Rail I2C DACs with Internal Reference Include Reset to High Impedance Outputs for Power Supply Margining

Wed, 09 Dec 2009 11:18:33 -0500

MILPITAS, CA - December 9, 2009 - Linear Technology Corporation introduces the LTC2635 quad 12-bit, 10-bit and 8-bit rail-to-rail digital-to-analog converters (DACs), which integrate a precision 10ppm/ºC reference in tiny 3mm x 3mm QFN and MSOP packages. Ordering options include 2.5V (LTC2635-L) and 4.096V (LTC2635-H) DAC full-scale outputs. In addition to offering power-on reset to zero and mid-scale options, the LTC2635-L also includes ordering options for high impedance outputs at power-on reset and during shutdown. This allows the DAC to be used in applications such as power supply margining where the DAC outputs must be electrically isolated from the power supply at power-on, before being called to action to adjust supply voltages up and down.

2.5µA Quiescent Current, 60V, 350mA(IOUT), 2.2MHz Step-Down DC/DC Converter

Tue, 08 Dec 2009 15:33:29 -0500

MILPITAS, CA - December 8, 2009 - Linear Technology Corporation announces the LT3990, a 350mA, 60V ultralow quiescent current step-down switching regulator. Its Burst Mode® operation keeps quiescent current under 2.5µA in no load condition. The LT3990's 4.3V to 60V input voltage range makes it ideal for automotive and industrial applications that need continuous output with ultralow power drain. Its internal 550mA switch can deliver up to 350mA of continuous output current at voltages as low as 1.21V. The LT3990's Burst Mode operation provides ultralow quiescent current, well suited for automotive or industrial systems, which demand always-on operation and optimum battery life. Switching frequency is user programmable from 200kHz to 2.2MHz, enabling the designer to optimize efficiency while avoiding critical noise-sensitive frequency bands. The combination of its 10-lead 3mm x 2mm DFN-10 (or MSOP) package and high switching frequency keeps external inductors and capacitors small, providing a very compact, thermally efficient footprint.

Selectable 250sps/1ksps 16-Bit ADC Integrates 10ppm/ºC Max Precision Reference

Mon, 07 Dec 2009 12:28:22 -0500

MILPITAS, CA - December 7, 2009 - Linear Technology Corporation introduces the LTC2470 and LTC2472, a pair of 16-bit delta sigma ADCs that integrate a high accuracy reference in tiny 3mm x 3mm DFN and 12-lead MSOP packages. The device's integrated 1.25V reference offers 2ppm/ºC drift performance and 0.1% initial accuracy for precise measurements in space-constrained applications. Both ADCs provide guaranteed 16-bit no missing code resolution and selectable 250sps or 1ksps output rate. The LTC2470 and LTC2472 are ideal for system and environmental monitoring and data acquisition systems requiring fast output rates.

37VIN, 1.2A(IOUT), 2.5MHz Step-Down DC/DC Converter Withstands 55V Transients

Thu, 03 Dec 2009 11:34:44 -0500

MILPITAS, CA - December 3, 2009 - Linear Technology Corporation announces the LT3686, a 1.2A, 37VIN step-down switching regulator. The LT3686 operates within a VIN range of 3.6V to 37V with overvoltage lockout, protecting the regulator and load from transients as high as 55V, making it ideal for load dump and cold-crank conditions commonly found in automotive applications as well as 24V industrial supplies. Its internal 1.85A switch can deliver up to 1.2A of continuous output current at voltages as low as 0.8V. Its low minimum on-time enables it to offer high switching frequencies even with high step-down ratios. For example, with an input as high as 16V, it can deliver a 3.3V output using a 2MHz switching frequency.

60VIN, 4A DC/DC µModule Regulator in 15mm x 15mm x 4.32mm Plastic Surface Mount Package

Wed, 02 Dec 2009 11:36:07 -0500

MILPITAS, CA - December 2, 2009 - Linear Technology Corporation introduces the LTM8027, a 4A system-in-a-package DC/DC µModule® regulator capable of operating from a 60V supply without any input protection. The LTM8027 includes the inductor, power switches, switching regulator and all support components in a small 2.6g 15mm x 15mm x 4.32mm land grid array (LGA) plastic package. The device can regulate an output voltage ranging from 2.5V to 24V from an input supply of 4.5V to 60V (65V absolute maximum). The LTM8027's rugged voltage rating makes it a suitable voltage regulator for 12V and 24V automotive and heavy equipment such as industrial robotics, 48V telecom, as well as avionics and industrial control systems.

Ultralow Voltage 20mV Step-Up Converter & Power Manager for Energy Harvesting Applications

Tue, 01 Dec 2009 10:55:28 -0500

MILPITAS, CA - December 1, 2009 - Linear Technology announces the LTC3108, a highly integrated step-up DC/DC converter designed to start-up and run from extremely low input voltage sources such as thermoelectric generators (TEGs), thermopiles and small solar cells. Its self-resonant topology steps up from input voltages as low as 20mV. Small temperature differences can be harvested and used to generate system power instead of traditional battery power. Energy harvesters are designed for applications requiring very low average power, but require periodic pulses of higher load current. For example, in many wireless sensor applications the circuitry is only powered to take measurements and transmit data periodically at low duty cycle.

55V, 1.2A (IOUT) Step-Down DC/DC Converter with Only 2.8µA Quiescent Current

Tue, 24 Nov 2009 11:55:01 -0500

MILPITAS, CA - November 24, 2009 - Linear Technology Corporation announces the LT3991, a 1.2A, 55V step-down switching regulator with an integrated boost diode. Its Burst Mode® operation keeps quiescent current under 2.8µA in no load standby conditions. The LT3991's 4.3V to 55V input voltage range makes it ideal for automotive and industrial applications. Its internal 1.7A switch can deliver up to 1.2A of continuous output current to voltages as low as 1.19V. The LT3991's Burst Mode operation offers ultralow quiescent current, making it well suited for applications such as automotive or industrial systems that demand always-on operation and optimum battery life. Switching frequency is user programmable from 200kHz to 2MHz, enabling the designer to optimize efficiency while avoiding critical noise-sensitive frequency bands. The combination of its 10-lead 3mm x 3mm DFN or thermally enhanced MSOP packages and high switching frequency keep external inductors and capacitors small, providing a compact, thermally efficient footprint.

38V, 1.2A (IOUT), 2MHz Step-Down DC/DC Converter at Only 2.8µA Quiescent Current

Mon, 16 Nov 2009 16:28:07 -0500

MILPITAS, CA - November 16, 2009 - Linear Technology Corporation announces the LT3971, a 1.2A, 38V step-down switching regulator with an integrated boost diode. Its Burst Mode® operation keeps quiescent current under 2.8µA in no load standby conditions. The LT3971’s 4.3V to 38V input voltage range makes it ideal for automotive and industrial applications. Its internal 2.4A switch can deliver up to 1.2A of continuous output current to voltages as low as 1.19V. The LT3971’s Burst Mode operation offers ultralow quiescent current, making it well suited for applications such as automotive or industrial systems, which demand always-on operation and optimum battery life. Switching frequency is user programmable from 200kHz to 2MHz, enabling the designer to optimize efficiency while avoiding critical noise-sensitive frequency bands. The combination of its 10-lead 3mm x 3mm DFN-10 (or thermally enhanced MSOP) package and high switching frequency keeps external inductors and capacitors small, providing a compact, thermally efficient footprint.

Highest Efficiency Rail-to Rail Op Amp Achieves 180MHz at 1mA

Thu, 12 Nov 2009 11:31:20 -0500

MILPITAS, CA - November 12, 2009 - Linear Technology introduces the LTC6246, LTC6247 and LTC6248, a family of op amps that utilizes a power-efficient SiGe process to achieve 180MHz gain-bandwidth product and 90V/µs slew rate, while consuming just 1mA maximum supply current per amplifier. These single, dual and quad op amps also feature rail-to-rail inputs and outputs, and 4.2nV/√Hz wideband noise.

High Efficiency PSE Controller Addresses New IEEE 802.3at PoE+ Standard

Wed, 11 Nov 2009 15:25:25 -0500

MILPITAS, CA - November 11, 2009 - Linear Technology Corporation introduces the LTC4274, a single-channel Power over Ethernet (PoE) controller for power sourcing equipment (PSE) required to provide IEEE 802.3at (25.5W) or proprietary higher power levels. Next-generation PoE applications call for more power to support demanding features, while increasing power efficiency in an effort to be more "green" and reduce costs. The LTC4274 provides up to 100W over 4-pair Ethernet cabling and is fully compliant with the new IEEE 802.3at PoE+ standard and backward compatible with the prior IEEE 802.3af PoE standard. To help conserve power, the LTC4274 delivers the lowest-in-industry heat dissipation by using low RDS(ON) MOSFETs and 0.25Ohm sense resistors, eliminating the need for expensive heat sinks and providing a more robust PSE solution.

High Power Dual Output Multiphase Step-Down DC/DC Controller with Differential Output Voltage Sensing, Tracking & PLL

Tue, 10 Nov 2009 12:53:49 -0500

MILPITAS, CA - November 10, 2009 - Linear Technology Corporation introduces the LTC3855, a dual output high efficiency (up to 95%) synchronous step-down DC/DC controller with multiphase operation, differential output voltage sensing and integrated phase-lock loop (PLL) synchronization. Up to 12 phases can be paralleled and clocked out of phase to minimize input and output filtering requirements for high current applications (up to 200A). The differential amplifier provides true remote output voltage sensing of both the positive and negative terminals, enabling high accuracy regulation where IR losses occur through vias, trace runs and interconnects. Applications include high current ASIC and FPGA supplies, power distribution buses, high power audio amplifiers and network servers.

Wide Input Voltage Range Low Minimum On-Time Synchronous Step-Down DC/DC Controller

Wed, 04 Nov 2009 11:08:02 -0500

MILPITAS, CA - November 4, 2009 - Linear Technology Corporation announces the LTC3775, a low minimum on-time wide input voltage range synchronous step-down DC/DC switching regulator controller that drives all N-channel power MOSFET stages. With less than a 30ns minimum on-time, the LTC3775 is well suited for high step-down ratios. The 4.5V to 38V input range encompasses a wide variety of applications, including most intermediate bus voltages and battery chemistries. The powerful onboard MOSFET gate drivers allow the use of high power external MOSFETs to produce output currents up to 20A with output voltages that range from 0.6V to 80% of the input voltage, making the LTC3775 ideal for automotive, industrial, medical, datacom and telecom applications.

2.25MHz Synchronous Step-Down DC/DC Converter with Programmable Input Current Limit Delivers up to 800mA

Thu, 29 Oct 2009 12:46:43 -0400

MILPITAS, CA - October 29, 2009 - Linear Technology announces the LTC3606B, a 2.25MHz, synchronous buck regulator with programmable average input current limit. It can deliver up to 800mA of continuous output current with efficiencies as high as 96%. Using a constant frequency and current mode architecture, the LTC3606B operates from an input voltage range of 2.5V to 5.5V, making it ideal for single-cell Li-Ion and USB applications. It can generate output voltages as low as 0.6V, enabling it to power the latest generation of low voltage DSPs and microcontrollers. The LTC3606B uses a switching frequency of 2.25MHz, allowing the use of tiny, low cost ceramic capacitors and inductors less than 1 mm in height. The combination of high switching frequency, tiny externals and a 3mm x 3mm DFN package make the LTC3606B a highly compact synchronous step-down solution.

High Linearity Downconverting Mixers Improve Performance & Reduce Power Consumption in 3G & 4G Wireless Basestations

Wed, 28 Oct 2009 13:07:05 -0400

MILPITAS, CA - October 28, 2009 - Linear Technology announces the LTC554x family of four new high dynamic range downconverting mixers covering the 700MHz to 4GHz wireless infrastructure frequency range. The LTC554x mixers offer outstanding IIP3 (input third-order intercept) of 26dBm, low noise figures of 9-10dB and high conversion gain of 8dB, enabling excellent dynamic range performance for both main receivers and digital predistortion receivers. The LTC554x family of mixers provides best-in-class capability to maintain a low noise figure in the presence of strong blocking interferers, and significantly enhancing receiver sensitivity and robustness. Unlike other mixers in their class, the LTC554x family operates on a single 3.3V supply without compromising performance, while reducing power consumption by 34% compared to the closest competing solution.

EMC Compliant, 1A, 36V DC/DC µModule Regulator

Wed, 21 Oct 2009 16:00:28 -0400

MILPITAS, CA - October 21, 2009 - Linear Technology Corporation introduces a complete 1A DC/DC regulator system-in-a-package, the LTM8031. This is the second member of Linear's new electromagnetic-compatible (EMC) DC/DC µModule® family. The LTM8031 includes the inductor, switching DC/DC controller, power switches, filters and all support components housed in a 9mm x 15mm x 2.82mm land grid array (LGA) package.

Synchronous Step-Down LED Driver Delivers Over 20A of Continuous LED Current

Tue, 20 Oct 2009 11:22:38 -0400

MILPITAS, CA - October 20, 2009 - Linear Technology announces the LT3743, a synchronous step-down DC/DC converter designed to deliver constant current to drive high current LEDs. The device's 5.5V to 36V input voltage range makes it ideal for a wide variety of applications, including industrial, DLP projection and architectural lighting. The LT3743 provides up to 20A of continuous LED current from a nominal 12V input, delivering in excess of 80 Watts. In pulsed LED applications, it can deliver up to 40A of LED current or 160 Watts from a 12V input. Efficiencies as high as 95% eliminate any need for external heat sinking and significantly simplify the thermal design. A frequency adjust pin enables the user to program the frequency between 100kHz and 1MHz so designers can optimize efficiency while minimizing external component size. Combined with a 4mm x 5mm QFN or thermally enhanced TSSOP-28 package, the LT3743 offers a very compact high-power LED driver solution.

C-MAC MicroTechnology Announces Partnership with Linear Technology

Tue, 29 Sep 2009 13:33:59 -0400

GREAT YARMOUTH, UK - September 29, 2009 - C-MAC MicroTechnology and Linear Technology Corporation (Nasdaq: LLTC) today announced a strategic partnership to provide the European, Canadian and Asian space markets with space qualified radiation hardened (rad-hard) monolithic devices and hybrid modules. This important partnership forms part of C-MAC's strategy for growth within the space market following C-MAC's accreditation to MIL-PRF-38534 Class K in 2007. C-MAC will assemble, test and qualify Linear Technology's rad-hard (RH) die in a new range of package outlines at its plant in Great Yarmouth, United Kingdom. This relationship will combine C-MAC's vast range of microelectronic packaging and test services with Linear's state-of-the-art portfolio of high performance analogue integrated circuits (ICs).

58V(IN), 2A with I(OUT), 2.4MHz Step-Down DC/DC Converter Draws Only 85µA of Quiescent Current & Withstands 80V Transients

Mon, 28 Sep 2009 13:24:08 -0400

MILPITAS, CA - September 28, 2009 - Linear Technology Corporation announces the LT3980, a 2A, 58V(IN) step-down switching regulator with Burst Mode® operation to maintain quiescent current under 85µA. The LT3980 operates within a V(IN) range of 3.6V to 58V, with overvoltage lockout protection against transients as high as 80V, making the device ideal for load dump and cold-crank conditions commonly found in automotive applications. Its internal 3.4A switch can deliver up to 2A of continuous output current at voltages as low as 0.79V. The LT3980's Burst Mode operation provides ultralow quiescent current, well suited for applications such as automotive or telecom systems, which have always-on circuits and demand optimal battery life. Switching frequency is user programmable from 100kHz to 2.4MHz, enabling the designer to maximize efficiency while avoiding critical noise-sensitive frequency bands. The combination of a 3mm x 4mm DFN-16 package (or thermally enhanced MSOP-16E) and high switching frequency keeps the LT3980's external inductor and capacitors small, providing a compact, thermally efficient footprint.

Dual 2.25MHz Synchronous Step-Down DC/DC Converter with Programmable Input Current Limit Delivers 400mA & 800mA Independently

Wed, 23 Sep 2009 11:16:38 -0400

MILPITAS, CA - September 23, 2009 - Linear Technology announces the LTC3619, a dual output, high efficiency, 2.25 MHz, synchronous buck regulator with programmable average input current limit. It can deliver up to 800mA of continuous output current from one channel and 400mA from the other with efficiencies as high as 96%. Using a constant frequency and current mode architecture, the LTC3619 operates from an input voltage range of 2.5V to 5.5V, making it ideal for single-cell Li-Ion and USB applications. It can generate two independent output voltages as low as 0.6V, enabling it to power the latest generation of low voltage DSPs and microcontrollers. The LTC3619 uses a switching frequency of 2.25 MHz, which allows for the utilization of tiny, low cost ceramic capacitors and inductors less than 1 mm in height. The combination of dual architecture, tiny externals and a 3mm x 3mm DFN (or thermally enhanced MSOP-10) package make the LTC3619 a highly compact synchronous step-down solution for dual output voltage rails.

USB Power Manager, Buck & LDO PMIC Consumes only 12µA IQ with All Outputs On

Tue, 22 Sep 2009 16:10:03 -0400

MILPITAS, CA - September 22, 2009 - Linear Technology Corporation announces the LTC3553, a micropower multifunction power management integrated circuit (PMIC) solution for portable Li-Ion/Polymer battery-based applications. The LTC3553 integrates a USB-compatible linear PowerPath™ manager, a stand-alone battery charger, a high efficiency synchronous buck regulator, a low dropout linear regulator and pushbutton controller in an ultrathin (0.55mm) 3mm x 3mm QFN package. A pin-selectable standby mode reduces battery drain current to just 12µA while keeping all outputs in regulation, extending battery run time. The LTC3553 is well suited for low power portable device applications, including personal navigation devices (PNDs), media players and handheld medical and industrial devices.

Industry’s Lowest Noise 2.5V Voltage Reference Features 2ppm/ºC Max Drift

Mon, 21 Sep 2009 14:21:25 -0400

MILPITAS, CA - September 21, 2009 - Linear Technology announces the LTC6655, an ultra-stable voltage reference with an unequaled noise level of only 625nVp-p (0.25ppmp-p) from 0.1Hz to 10Hz.

45V, 750mA LED Driver for Boost, Buck or Buck-Boost High Current LED Applications

Wed, 16 Sep 2009 11:06:01 -0400

MILPITAS, CA - September 16, 2009 - Linear Technology announces the LT3519, a 45V, high side current sense DC/DC converter designed to drive high current LEDs. The LT3519's 3V to 40V input voltage range makes it ideal for applications such as automotive and industrial lighting. The combination of an internal 45V, 750mA switch, Schottky diode and internal compensation provides a highly compact LED driver solution.

Quiescent Current 2.5µA, 40V, 350mA(IOUT), 2.2MHz Step-Down DC/DC Converter

Tue, 15 Sep 2009 11:22:40 -0400

MILPITAS, CA - September 15, 2009 - Linear Technology Corporation announces the LT3970, a 350mA, 40V step-down switching regulator with integrated boost and catch diodes. Its Burst Mode® operation keeps quiescent current under 2.5µA in no load standby conditions. The LT3970's 4.2V to 40V input voltage range makes it ideal for automotive and industrial applications. Its internal 550mA switch can deliver up to 350mA of continuous output current to voltages as low as 1.21V. The LT3970's Burst Mode operation offers ultralow quiescent current, making it well suited for applications such as automotive or industrial systems, which demand always-on operation and optimum battery life. Switching frequency is user programmable from 200kHz to 2.2MHz, enabling the designer to optimize efficiency while avoiding critical noise-sensitive frequency bands. The combination of its 10-lead 3mm x 2mm DFN-10 (or MSOP) package and high switching frequency keeps external inductors and capacitors small, providing a very compact, thermally efficient footprint.

45V 100mA LDO Offers 30µVRMS Noise, Programmable Current Limit & Diagnostic Information

Mon, 14 Sep 2009 11:34:36 -0400

MILPITAS, CA - September 14, 2009 - Linear Technology Corporation announces the LT3050, a high voltage, low noise, low dropout voltage linear regulator offering precision, programmable current limit and diagnostic capability. The device delivers up to 100mA output current with a 340mV dropout voltage at full load. The LT3050 features a wide 2V to 45V input voltage range, delivering adjustable output voltages from 0.6V to 44.5V. A single capacitor at the REF/BYP pin provides programmable low noise operation--only 30µVRMS across a wide bandwidth of 10Hz to 100kHz--and reference soft start functionality, preventing output voltage overshoot at turn-on. Output voltage tolerance is highly accurate at ±2% over line, load and temperature.

Drive up to 16 Channels of Ten 50mA LEDs with 3,000:1 True Color PWM Dimming

Thu, 10 Sep 2009 12:17:51 -0400

MILPITAS, CA - September 10, 2009 - Linear Technology announces the LT3754, a 16-channel LED driver, utilizing a step-up DC/DC controller capable of driving up to 45V of 50mA LEDs per channel. Its internal 60V, 1MHz DC/DC boost mode controller is designed to operate as a constant current LED driver for up to 160 white LEDs. From a 12V input, the LT3754 can drive 16 channels, each with up to ten 50mA white LEDs in series while delivering efficiencies exceeding 92%. Its multi-channel capability makes it ideal for medium and large-sized TFT-LCD backlighting applications. Its input voltage range of 6V to 40V makes it ideal for automotive, avionic, HDTV and industrial display applications.

36V, 3.5A, 2.4MHz Step-Down DC/DC Converter Requires Only 75µA of Quiescent Current & Operates with 150ºC Maximum Junction Temperature

Wed, 09 Sep 2009 11:43:51 -0400

MILPITAS, CA - September 9, 2009 - Linear Technology announces the "H-grade" version of the LT3680, a 3.5A, 36V step-down switching regulator with Burst Mode® operation to keep quiescent current under 75µA. The LT3680 operates within a VIN range of 3.6V to 36V, making it ideal for load dump and cold-crank conditions found in automotive applications. The H-grade version operates up to a junction temperature of 150ºC, compared to the "E" and "I" versions' 125ºC maximum junction temperature. All electrical specifications are identical for the E, I and H-grade versions. The H-grade devices are tested and guaranteed to the maximum junction temperature of 150ºC, making them are ideal for automotive and industrial applications which are subjected to high ambient temperatures.

33V (62V Transient), 3.5A(IOUT), 2.4MHz Step-Down DC/DC Converter with TJ(MAX)=150ºC

Tue, 08 Sep 2009 12:20:53 -0400

MILPITAS, CA - September 8, 2009 - Linear Technology announces the H-grade version of the LT3972. The LT3972 is a 3.5A, 33V step-down switching regulator with Burst Mode® operation to keep quiescent current under 75µA. The LT3972 operates within a VIN range of 3.6V to 33V, with overvoltage lockout protection against transients as high as 62V, making it ideal for load dump and cold-crank conditions found in automotive applications. Its internal 4.6A switch can deliver up to 3.5A of continuous output current to voltages as low as 0.79V. The LT3972’s Burst Mode operation offers ultralow quiescent current, well suited for applications such as automotive or telecom systems, which demand always-on operation and optimum battery life. Switching frequency is user programmable from 200kHz to 2.4MHz, enabling the designer to optimize efficiency while avoiding critical noise-sensitive frequency bands. The combination of its thermally enhanced MSOP-10E package and high switching frequency, which keeps external inductors and capacitors small, provides a compact, thermally efficient footprint.

36V Input (60V Transient), 1A Fault Tolerant Step-Down Regulator Requires Only 75uA of Quiescent Current

Thu, 03 Sep 2009 13:43:18 -0400

MILPITAS, CA - September 3, 2009 - Linear Technology Corporation announces the LT3695, a fault tolerant 1A, 36V input step-down switching regulator. Its Burst Mode® operation keeps quiescent current under 75µA in no load standby conditions. The LT3695 operates from a 3.6V to 36V input voltage range and can safely sustain transient voltages up to 60V, making it ideal for load dump and cold-crank conditions commonly found in automotive applications. Its 1.45A internal switch can deliver up to 1A of continuous output current at voltages as low as 0.8V. The LT3695’s Burst Mode operation provides ultralow quiescent current, well suited for applications such as automotive, industrial or telecom systems, which demand always-on operation and optimum battery life. Switching frequency is user programmable from 250kHz to 2.2MHz, enabling the designer to optimize efficiency while avoiding critical noise-sensitive frequency bands. The combination of its thermally enhanced MSOP-16 package and high switching frequency, which keeps external inductors and capacitors small, provides a very compact, thermally efficient footprint.

Ultralow Power 15mA Synchronous Low Noise Step-Down Switching Regulator

Wed, 02 Sep 2009 11:52:22 -0400

MILPITAS, CA - September 2, 2009 - Linear Technology announces the LTC3620, a high efficiency, synchronous buck regulator which can deliver up to 15mA from a very small footprint for single Li-Ion-powered applications. The internal synchronous switches deliver efficiencies as high as 95% while Burst Mode® operation requires only 18uA of quiescent current, maximizing battery run time. The LTC3620 can take a 2.9V-5.5V input, and is adjustable to outputs as low as the 0.6V, whereas the LTC3620-1 option is internally programmed to provide a 1.1V output, eliminating the need for external feedback resistors. The LTC3620’s 2mm x 2mm DFN package with only four tiny externals, ensures a very compact solution footprint for a wide array of ultralow power applications.

3A, 4MHz, Synchronous Step-Down Regulator in 3mm x 4mm QFN

Tue, 01 Sep 2009 15:52:22 -0400

MILPITAS, CA - September 1, 2009 - The LTC3612 is a high efficiency, 4MHz synchronous buck regulator from Linear Technology that incorporates a constant frequency, current mode architecture. It can deliver up to 3A of continuous output current at output voltages as low as 0.6V from a 3mm x 4mm QFN or a thermally enhanced TSSOP-20 package. The LTC3612 operates from an input voltage of 2.25V to 5.5V, making it ideal for single cell Li-Ion applications as well as 3.3V or 5V intermediate bus systems. Its switching frequency is user programmable from 300kHz to 4MHz, enabling the use of tiny, low cost capacitors and inductors.

Isolated RS485 µModule® Transceiver Integrates Isolated Power

Mon, 31 Aug 2009 15:50:40 -0400

MILPITAS, CA - August 31, 2009 - Linear Technology Corporation introduces the LTM2881, an isolated RS485 µModule® transceiver that guards against large ground-to-ground differentials and common mode transients. In practical RS485 systems, ground potentials vary widely from node to node, often exceeding the tolerable range, which can result in an interruption of communications or destruction of a transceiver. The LTM2881 breaks ground loops by isolating the logic level interface and line transceiver using internal inductive signal isolation that allows for a much larger common mode voltage range plus superior common mode rejection of >30kV/µS. A low EMI DC-DC converter powers the transceiver and provides an isolated 5V supply output for powering any supporting external components. With 2,500VRMS of galvanic isolation, onboard secondary power and a fully compliant RS485 transmitter and receiver, the LTM2881 requires no external components, ensuring a complete, small µModule solution for isolated serial data communications.

36V Input with 60V Transient 700mA, Micropower Step-Down Regulator Has On-Chip Power-On Reset & Watchdog Timer

Thu, 27 Aug 2009 12:21:15 -0400

MILPITAS, CA - August 27, 2009 - Linear Technology Corporation announces the LT3689, a 700mA, 36V input step-down switching regulator with a power-on reset and watchdog timer. Its Burst Mode® operation keeps quiescent current under 85uA in no load standby conditions. The LT3689’s 3.6V to 36V input voltage range, with 60V transient ride through, makes it ideal for load dump and cold crank conditions commonly found in automotive applications. Its 1.2A internal switch can deliver up to 700mA of continuous output current at voltages as low as 0.8V. The LT3689’s Burst Mode® operation provides ultralow quiescent current, well suited for applications such as automotive or telecom systems, which demand always-on operation and optimum battery life. Switching frequency is user programmable from 350kHz to 2.2MHz, enabling the designer to optimize efficiency while avoiding critical noise-sensitive frequency bands. The LT3689’s 3mm x 3mm QFN-14 (or thermally enhanced MSOP-16) package and high switching frequency keeps external inductors and capacitors small, providing a very compact, thermally efficient footprint.

Dual 4A or Single 8A DC/DC µModule Regulator in 15mm x 15mm Surface Mount Package

Wed, 26 Aug 2009 11:08:47 -0400

MILPITAS, CA - August 26, 2009 - Linear Technology Corporation introduces the LTM4614, a complete dual DC/DC µModule® regulator system including inductors in a tiny surface mount package. The LTM4614 can regulate either two voltages from 0.8V to 5V at up to 4A each or one output voltage at up to 8A by sharing current from both outputs. The LTM4614’s versatility is enhanced by its ability to operate from two different supply rails ranging from 2.375V to 5.5V (6V max) or from one input supply by tying the input pins together. This complete DC/DC system solution includes all the elements needed for a dual point-of-load regulator: inductors, capacitors, DC/DC controller, compensation circuitry and power switches. All are encapsulated and protected within a plastic surface mount LGA (land grid array) package. The package dimensions are 15mm x 15mm with only 2.8mm of height, providing a low profile point-of-load regulator that allows smooth air flow for cooling in densely populated circuit boards, providing a simple solution for powering FPGA and ASIC cores and I/O.

Dual, 26VIN, 4A DC/DC µModule Regulator in 15mm x 15mm Surface Mount Package

Tue, 25 Aug 2009 11:14:56 -0400

MILPITAS, CA - August 25, 2009 - Linear Technology Corporation introduces the LTM4619, a complete dual step-down DC/DC µModule® regulator system, including inductors and MOSFETs in a tiny surface mount package. The LTM4619 regulates two output voltages ranging from 0.8V to 5V at up to 4A each from an input supply of 4.5V to 26.5V (28V abs max). The outputs are regulated with 180º out-of-phase operation to minimize input ripple current, thus requiring fewer input capacitors. This complete dual DC/DC system solution includes all the necessary components for two point-of-load regulator circuits: inductors, bypass capacitors, DC/DC controllers, compensation circuitry and power switches. All components are encapsulated and protected within a plastic surface mount LGA (land grid array) package. Package dimensions are 15mm x 15mm with only 2.8mm of thickness, providing a low profile point-of-load regulator for more efficient air cooling in densely populated circuit boards. The LTM4619 is a simple single part dual DC/DC solution in an IC form factor, designed for systems requiring localized multirail regulation from input supplies such as 5V, 12V or 24V. Applications range from avionics and medical systems to datacom and enterprise equipment.

Configurable Supply Monitor Integrates Adjustable Watchdog & Reset Timers for Multi-Rail Systems

Mon, 24 Aug 2009 13:24:19 -0400

MILPITAS, CA - August 24, 2009 - Linear Technology Corporation introduces the LTC2939, a 6-channel supply monitor with processor supervisory functions that can be configured for low voltage applications down to 1.2V. One of sixteen preset or adjustable voltage threshold combinations can be selected, all of which maintain an accuracy of ±1.5% from -40ºC to 125ºC. These preset set points are selected via an external resistive pair on a single pin, while the actual thresholds are set by integrated precision dividers for 5V, 3.3V, 2.5V and 1.5V supply monitoring. Built-in power supply glitch immunity allows the LTC2939 to practically eliminate false detections, while only using 80uA of supply current. Set points, reset timeout period and watchdog timeout period are all at the discretion of the designer when using the LTC2939 to monitor multiple positive and negative power rails.

Breakthrough 2A Solar Battery Charger Matches Peak Power Tracking with Simple Control Loop

Thu, 20 Aug 2009 16:06:30 -0400

MILPITAS, CA - August 20, 2009 - Linear Technology Corporation introduces the LT3652, an innovative, solar power directed monolithic buck battery charger IC for modern battery chemistries. The LT3652 features an innovative input voltage regulation loop, which controls charge current to hold the input voltage at a programmed level. When the LT3652 is connected to a solar panel, the input regulation loop maintains the panel at peak output power. According to Steve Pietkiewicz, Vice President and General Manager of Power Products, "The LT3652’s simple but unique input voltage regulation loop circuitry delivers virtually the same charging efficiency as more complex and expensive Maximum Peak Power Tracking (MPPT) techniques."

Programmable 200mA Linear Regulator Features 0V Output Operation, Bulletproof Protection & Is Easily Paralleled

Wed, 19 Aug 2009 15:16:32 -0400

MILPITAS, CA - August 19, 2009 - The latest member of a next-generation family of linear regulators, adjustable down to 0 volts with a single resistor and easily paralleled for higher current, is now available from Linear Technology Corporation. The LT3082 200mA PNP low dropout regulator (LDO) features a new architecture using a current reference and voltage follower. This architecture permits the paralleling of multiple regulators and sharing of output current using small amounts of PCB trace as ballast resistors. Current sharing spreads the heat in an all-surface-mount system. Extensive protection features include current limiting and thermal limiting as well as reverse input protection for the regulator and the load.

Triple-Output DC/DC µModule Regulator in 15mm x 15mm Surface Mount Package Features Two 4A Switch-Mode Regulators Plus One 1.5A Linear Regulator

Tue, 18 Aug 2009 13:07:44 -0400

MILPITAS, CA - August 18, 2009 - Linear Technology Corporation introduces the LTM4615, a complete triple-output DC/DC µModule® regulator system containing two 4A switch mode regulators and one 1.5A very low dropout (VLDO™) linear regulator in a compact 15mm x 15mm x 2.8mm surface mount package. The output voltage for each of the two switching regulators is adjustable from 0.8V to 5V, and the third output is adjustable from 0.4V to 2.6V, making it suitable for powering the new generation of lower voltage multiple-rail 65nm and 45nm digital ICs.

Dual Output Synchronous DC/DC Controller Draws Only 170uA in Battery-Powered Systems

Mon, 17 Aug 2009 11:40:55 -0400

MILPITAS, CA - August 17, 2009 - Linear Technology Corporation introduces the LTC3868/-1, a low quiescent current, 2-phase dual output synchronous step-down DC/DC controller. The LTC3868/-1 draws only 170uA with one output active and only 300uA when both outputs are active, making it ideal for battery-powered applications. With both outputs shut down, the LTC3868/-1 draws only 8uA. The LTC3868/-1 has an input supply range of 4V to 24V and each output can be set from 0.8V to 14V at output currents up to 20 amps. With efficiency as high as 95%, a LTC3868/-1 based DC/DC converter is well suited for powering industrial and medical devices, along with portable instruments, notebook and netbook computers.

Dual Output High Efficiency Synchronous DC/DC Controller Draws Only 50uA in Battery-Powered Systems

Thu, 13 Aug 2009 12:20:54 -0400

MILPITAS, CA - August 13, 2009 - Linear Technology Corporation introduces the LTC3857/-1, an ultralow quiescent current, 2-phase dual output synchronous step-down DC/DC controller that draws only 50uA when one output is active and only 80uA when both outputs are enabled. With both outputs shut down, the LTC3857/-1 draws a mere 8uA. This part is ideal for automotive applications where one or both supplies remain active in standby mode. The LTC3857/-1’s input supply range of 4V to 38V is wide enough to protect against automotive high voltage transients, continue operation during cold crank and cover a broad range of battery chemistries. Each output can be set from 0.8V to 24V at output currents up to 20 amps, with efficiencies as high as 95%. The LTC3857/-1 is suitable for powering GPS systems, audio systems, CD/DVD players and disk drives.

15V, 4MHz, Synchronous Step-Down Regulator Delivers 1.5A from a 3mm x 3mm QFN

Wed, 12 Aug 2009 12:24:12 -0400

MILPITAS, CA - August 12, 2009 - The LTC3601 is a high efficiency, 4MHz synchronous buck regulator from Linear Technology that incorporates a controlled frequency, current mode architecture. It can deliver up to 1.5A of continuous output current at output voltages as low as 0.6V from a 3mm x 3mm QFN or a thermally enhanced MSOP-16 package. The LTC3601 operates from an input voltage of 4V to 15V, making it ideal for dual-cell Li-Ion applications as well as 12V intermediate bus systems. Its switching frequency is user programmable from 800kHz to 4MHz, enabling the use of tiny, low cost capacitors and inductors.

36VIN, 3A DC/DC µModule Converter Regulates 0.8V to 24VOUT

Tue, 11 Aug 2009 11:42:23 -0400

MILPITAS, CA - August 11, 2009 - Linear Technology Corporation introduces the LTM8025, a 3A high voltage DC/DC µModule® regulator system with up to 36V input voltage and 24V output voltage. The 24V output voltage range is ideal for 12V to 20V intermediate bus systems and the 36V input provides sufficient input protection in 24V and 28V systems. The LTM8025 is a complete DC/DC solution that includes a DC/DC controller IC, power switches, inductor, compensation circuitry and input and output bypass capacitors. The module is a molded plastic 9mm x 15mm x 4.32mm LGA (Land Grid Array) surface mount package that weighs less than 1.8g. Because of high input and output voltage ratings, the LTM8025 is well suited for applications such as 24V industrial, 28V medical and avionics, as well as 12V communication systems.

100V Input DC/DC Controller Generates Positive or Negative Regulated Output

Tue, 04 Aug 2009 11:36:47 -0400

MILPITAS, CA - August 4, 2009 - Linear Technology Corporation announces the LT3758, a high input voltage DC/DC controller for boost, flyback, SEPIC and inverting power supply applications, capable of generating either positive or negative regulated output voltages. The LT3758 has two voltage feedback error amplifiers and reference voltages. One set is for positive output voltages, the other is for negative output voltages, both off a single feedback pin, making the LT3758 a highly versatile DC/DC controller for many types of power supply designs.

Octal PMBus Power Supply Monitor Manages DC/DC Converters Digitally

Mon, 03 Aug 2009 14:16:15 -0400

MILPITAS, CA - August 3, 2009 - Linear Technology Corporation introduces the LTC2978 Power Supply Monitor and Controller for digital management of up to eight 0V to 6V power supplies. Configuring multiple DC/DC converters in an already complex system can be a complicated design task when using passive components. Values defined by external trim resistors and capacitors such as startup time, setpoint value or switching frequency make a system inflexible. To help alleviate these issues, digital control over analog power supplies has allowed for quick adjustment of output voltages and precise protection, monitoring and diagnostic mechanisms. The LTC2978's PMBus compliant interface provides easy access to an on-board EEPROM, giving users supply configuration, fault response and logging capabilities. In addition, an array of supervising, margining and sequencing functions make the LTC2978 a convenient, all-in-one digital power management solution, drastically simplifying the design challenges and reducing the component count typical of traditional analog control.

1.2A(IOUT), 1.5MHz High Input Voltage Switching Regulator with Programmable Output Current Limit

Thu, 30 Jul 2009 11:07:08 -0400

MILPITAS, CA - July 30, 2009 - Linear Technology Corporation announces the LT3663, a 1.2A, 1.5MHz monolithic current mode step-down switching regulator with a programmable output current limit. Its wide operating input voltage of 7.5V to 36V makes the LT3663 ideal for a variety of input sources, including unregulated 12V wall adapters, 24V industrial supplies, Fire Wire, as well as automotive applications. Onboard input overvoltage lockout protects the device through input transients as high as 60V, such as those commonly found in automotive applications.

4mm x 7mm PMIC Integrates Linear Power Manager & Charger, Three Buck Regulators, LED Driver, OVP & Pushbutton Control

Wed, 29 Jul 2009 11:20:03 -0400

MILPITAS, CA - July 29, 2009 - Linear Technology Corporation announces the LTC3577, LTC3577-1, LTC3577-3 and LTC3577-4, highly integrated multi-function power management integrated circuit (PMIC) solutions for portable Li-Ion/Polymer battery applications. The LTC3577/-X integrates a USB-compatible linear PowerPath™ manager, a standalone battery charger, overvoltage protection, 10-LED driver, pushbutton on/off control, three high efficiency synchronous buck regulators and two LDOs in a low-profile 4mm x 7mm QFN package. The LTC3577-1 and LTC3577-4 feature a 4.1V battery float voltage for improved battery cycle life and additional high temperature safety margin, while the LTC3577 and LTC3577-3 include a standard 4.2V battery float voltage for maximum run time. The LTC3577-3 and LTC3577-4 are tailored for SiRF Atlas IV chipsets. These ICs are highly suited for portable device applications including personal navigation devices (PNDs), digital media/video broadcasting (DMB/DVBs), digital/satellite radio, media players, universal remotes, photo viewers and portable medical and industrial devices.

Quad/Dual 14-Bit, 125Msps ADCs Dissipate One-Third the Power

Tue, 28 Jul 2009 15:46:21 -0400

MILPITAS, CA - July 28, 2009 - Linear Technology Corporation announces a family of 24 ultralow power 14-bit/12-bit, 125Msps to 25Msps, quad and dual ADCs that dissipate as little as one-third the power of competing ADCs. The flagship ADC is the LTC2175-14, a quad 14-bit, 125Msps ADC that dissipates only 558mW (140mW per channel). The LTC2175 significantly reduces system power without sacrificing AC performance, offering signal to noise ratio (SNR) performance of 73.4dB and spurious free dynamic range (SFDR) of 88dB at baseband. Operating from 1.8V analog and digital supplies, the LTC2175 includes a sleep mode that reduces power dissipation to just 1mW.

UltraFast™ Digitally Programmable 5A LDO Features 85mV Dropout & 25uVRMS Noise

Mon, 27 Jul 2009 11:17:45 -0400

MILPITAS, CA - July 27, 2009 - Linear Technology Corporation announces the LT3070, a digitally programmable linear regulator with the lowest dropout voltage, lowest noise and fastest transient response of any monolithic 5A LDO currently available. Dropout voltage at 5A is an ultralow 85mV. Output voltage noise at 5A is only 25uVRMS over a 10Hz to 100kHz bandwidth. The LT3070’s 1MHz unity gain bandwidth, coupled with its minimum 15uF ceramic output capacitance, provides a mere 30mV of overshoot/undershoot in response to a fast 4.5A output load step, saving significant bulk capacitance, space and cost. The LT3070 is ideal for efficiently powering low voltage, high current devices such as FPGAs, DSPs, ASICs, microprocessors, sensitive communication supplies, server/storage devices, and post-buck regulation applications.

Dual Output Synchronous DC/DC Controller Draws Only 170uA in Battery-Powered Systems

Tue, 21 Jul 2009 11:42:57 -0400

MILPITAS, CA - July 21, 2009 - Linear Technology Corporation introduces the LTC3858/-1, a low quiescent current, 2-phase dual output synchronous step-down DC/DC controller that draws only 170uA with one output active and only 300uA when both outputs are active. With both outputs shut down, the LTC3858/-1 draws a mere 8uA, which is ideal for automotive and notebook PC applications. The LTC3858/-1’s wide input supply range of 4V to 38V protects against automotive wide input voltage transients commonly found during load dump and cold crank conditions and to cover a broad range of battery chemistries. Each output can be set from 0.8V to 24V at output currents up to 20 amps with efficiency as high as 95%. The LTC3858/-1 is suitable for powering high performance systems including navigation, audio, communications, CD/DVD players and disk drives.

High Dynamic Range Active Upconverting Mixer Supports All LTE/ Cellular Bands from 400MHz to 2.7GHz

Mon, 20 Jul 2009 14:49:55 -0400

MILPITAS, CA - July 20, 2009 - A new wide bandwidth active upconverting mixer, the LT5578 from Linear Technology, delivers high dynamic range performance from 400MHz to 2.7GHz, supporting all of the allocated LTE (Long-Term Evolution) broadband wireless services. At 900MHz, the mixer offers 27dBm Output IP3 linearity and best-in-class noise floor of -160.5dBm/Hz at an output level of -5dBm, enabling outstanding transmitter dynamic range. In addition, the mixer has 1.4dB conversion gain with integrated RF balun transformers that provide a single-ended RF output and LO (Local Oscillator) input to simplify designs while reducing external component count. Moreover, the device’s LO input is internally buffered, requiring a drive level of only -1dBm. This results in an outstanding LO-to-RF leakage of -43dBm.

800MHz VGA with 31dB Analog Control Range Has 35dBm OIP3 from 3.3V Supply

Tue, 14 Jul 2009 12:52:19 -0400

MILPITAS, CA - July 14, 2009 - Linear Technology introduces the LTC6412, an 800MHz analog-controlled variable gain amplifier (VGA) with outstanding noise and distortion performance, gain conformance, and gain flatness. The device’s gain control is highly linear. With a guaranteed maximum conformance error of only 0.45dB, the LTC6412 offers a significant improvement over competing solutions.

Digital Predistortion µModule Receiver Simplifies Basestation Design

Tue, 21 Jul 2009 09:45:28 -0400

MILPITAS, CA - July 13 - Linear Technology introduces the LTM9003, a wideband RF-to-digital receiver subsystem that includes a high performance 12-bit, 250Msps analog-to-digital converter (ADC), a bandpass filter, intermediate frequency (IF) amplifier and a high linearity RF downconverting mixer. The integrated µModule® receiver significantly reduces board space and development time for wireless basestations implementing PA linearization with digital predistortion (DPD). The LTM9003 harnesses years of signal chain design experience and offers it in an easy-to-use 11.25mm × 15mm µModule package.

4MHz, 3A Synchronous Step-Down Regulator Now Offered in High Reliability, MP-Grade Temperature Range

Thu, 02 Jul 2009 11:50:43 -0400

MILPITAS, CA - July 2, 2009 - Linear Technology announces the high reliability, MP-grade version of the LTC3412A. The LTC3412A is a high efficiency, 4MHz synchronous buck regulator that uses a constant frequency, current mode architecture. It can deliver up to 3A of continuous output current at voltages as low as 0.8V from a thermally enhanced TSSOP-16 package. It operates from an input voltage range of 2.25V to 5.5V, making it ideal for both single-cell Li-Ion, or NiMH applications, as well as more general purpose fixed rail systems. The MP-grade version is guaranteed to operate over a -55°C to 125°C junction temperature range. The LTC3412AMP is ideal for high reliability applications that can experience a very wide ambient temperature range.

High Power PD Controllers with Built-In Switchers Address IEEE 802.3at PoE+ Standard

Tue, 30 Jun 2009 12:01:12 -0400

MILPITAS, CA - June 30, 2009 - Linear Technology Corporation introduces the LTC4269-1, LTC4269-2 and LTC4278, IEEE 802.3at compliant Power over Ethernet (PoE+) interface controllers with integrated switching regulators for high-power Powered Device (PD) applications up to 25.5W and beyond. The new IEEE 802.3at definition, also known as the PoE+ standard, simultaneously expands the power budget and improves the classification mechanism used by Power Sourcing Equipment (PSE) and PDs to identify each other. The LTC4269 and LTC4278 support 2-event classification, are backward compatible with IEEE 802.3af devices, and open up the next level of PoE applications.

16-Bit Octal SPI DAC Achieves ±4LSB INL (Max)

Mon, 29 Jun 2009 12:54:38 -0400

MILPITAS, CA - June 29, 2009 - Linear Technology Corporation introduces the LTC2656, a 16-bit octal digital-to-analog converter (DAC) that offers ±4LSB INL maximum over temperature, a factor of three times better than the nearest octal competitor. The combination of low 0.1% (max) gain error and low ±2mV (max) offset error ensure that LTC2656 remains accurate near the supply rails and provides the user with a wider effective output range. The LTC2656’s precision specifications makes it ideal for multichannel open loop and closed loop systems typically found in communication systems, industrial process control, automated test equipment (ATE) and programmable logic controllers.

16-Bit I2C ADC Integrates 2ppm/°C Reference in 3mm x 3mm Package

Wed, 24 Jun 2009 12:58:54 -0400

MILPITAS, CA - June 24, 2009 - Linear Technology Corporation introduces the LTC2463, a 16-bit delta sigma ADC that integrates a precision reference in tiny 12-lead 3mm x 3mm DFN and 4mm x 5mm MSOP packages. With the device’s integrated reference (2ppm/°C typical, 10ppm/°C maximum), the LTC2463 allows precise measurements with no need for an external reference. The LTC2463 communicates via a 2-wire I2C interface and is a complete analog solution for portable sensors, compact systems or power supply monitoring.

16-Bit Quad SPI DAC Achieves ±1LSB INL & DNL with Software-Programmable Unipolar & Bipolar Outputs

Mon, 22 Jun 2009 11:07:28 -0400

MILPITAS, CA - June 22, 2009 - Linear Technology Corporation introduces the LTC2754-16, a quad 16-bit current output digital-to-analog converter (DAC) that achieves ±1LSB integral nonlinearity (INL) and differential nonlinearity (DNL). All four DACs can be software programmed or pin-strapped for one of six unipolar or bipolar output ranges via a simple 4-wire serial interface. Software programmability eliminates the need for expensive precision resistors, gain stages and manual jumpers. The LTC2754-16’s precision DC specifications and flexible SoftSpan output configurability make it ideal for multichannel data acquisition modules and automated test equipment. A pin- and software-compatible 12-bit option is also available, making it easy to transition between different resolutions in the end-product.

Flyback Controller Operates at 150°C Junction Temperature

Thu, 18 Jun 2009 14:04:50 -0400

MILPITAS, CA - June 18, 2009 - Linear Technology Corporation announces the H-grade version of the LTC3803-3, a current mode flyback DC/DC controller in a tiny 6-pin ThinSOT™ package. This H-grade device is guaranteed up to +150°C operating junction temperature and is ideal for automotive and industrial applications subjected to high ambient temperatures. The LTC3803H-3 can be powered from an input voltage ranging from 9V to 75V through a series resistor clamped with the device’s internal shunt regulator. The controller is well suited for 4:1 input voltage range isolated applications commonly found in 12V and 42V automotive requirements.

32V Monolithic Li-Ion/Polymer Battery Chargers Deliver up to 2A in Compact 9mm2 Package

Wed, 17 Jun 2009 09:07:11 -0400

MILPITAS, CA - June 17, 2009 - Linear Technology Corporation introduces the LT3650-4.1 and LT3650-4.2, compact, monolithic high-voltage battery chargers for single-cell Li-Ion/Polymer batteries. The device’s switchmode architecture minimizes power dissipation without compromising board space. The LT3650-4.1/4.2 operates from 4.75V to 32V and has a 40V absolute maximum rating for added system margin. User selectable timer or C/10 termination requires no external microcontroller and simplifies the design. Charge current is programmable and dynamically adjustable up to 2A; the power device is integrated on chip to save board space. The LT3650-4.1/4.2 does not require external high-precision resistors to set the float voltage, further saving cost and space. Applications include industrial handheld instruments, 12V to 24V automotive and heavy equipment, desktop cradle chargers and small notebook or tablet computers. The LT3650-4.1 offers a 4.1V battery float voltage, allowing high temperature safety margin, while the LT3650-4.2 features a 4.2V final charge voltage for optimized battery run time.

Dual-Channel uModule Receiver Subsystem Combines High-Speed ADCs & Drivers in Compact Package

Tue, 09 Jun 2009 14:36:22 -0400

MILPITAS, CA - June 9, 2009 - Linear Technology introduces the LTM9002, a dual IF/baseband receiver subsystem that includes a high performance dual 14-bit Analog-to-Digital converter (ADC) sampling up to 125Msps, anti-aliasing filters, fixed gain differential ADC drivers and 12-bit, trim Digital-to-Analog converters (DACs). The integrated receiver significantly reduces the board space and development time for wireless base stations implementing I/Q receivers, direct conversion receivers or multi-channel configurations including diversity receivers. The LTM9002 harnesses years of applications experience and wraps it into an easy-to-use 11.25mm × 15mm uModule® package.

4A Multicell/Chemistry Battery Charger Controllers in Compact 16mm2 Package Require No Blocking Diode

Mon, 08 Jun 2009 12:57:28 -0400

MILPITAS, CA - June 8, 2009 - Linear Technology Corporation introduces the LTC4012, LTC4012-1 and LTC4012-2, fast-charge 4A capable high efficiency switchmode battery charger controllers for multiple battery chemistries. The LTC4012 supports Li-Ion/Polymer, NiMH, NiCd and sealed lead acid battery chemistries in single and multicell configurations. The LTC4012 offers an adjustable battery termination voltage, while the LTC4012-1 and LTC4012-2 utilize a programmable internal resistor divider to charge from 1 to 4 series Lithium cells at multiples of 4.1V and 4.2V, respectively. All devices feature a wide output voltage range of 2V to 28V. The devices’ analog INFET control means there is no need for an external blocking diode at the power input, thereby increasing efficiency and reducing the solution footprint. Also, AC adapter current limiting maximizes the charge rate for a given fixed input power level, allowing the end-product to operate at the same time the battery is charging without complex load management algorithms. The ICs operate at input voltages from 5V to 28V and are intended for applications including portable computers, portable instruments, and battery backup systems.

USB Power Manager & Dual Buck PMIC Optimized for Ultralow IQ

Thu, 04 Jun 2009 12:33:31 -0400

MILPITAS, CA - June 4, 2009 - Linear Technology Corporation announces the LTC3554, a micropower multifunction power management integrated circuit (PMIC) solution for portable Li-Ion/Polymer battery-based applications. The LTC3554 integrates a USB-compatible linear PowerPath™ manager, a stand-alone battery charger, two high efficiency synchronous buck regulators and pushbutton control in an ultra-thin (0.55mm) 3mm x 3mm QFN package. A pin-selectable standby mode reduces battery drain current to just 10uA with all outputs on. The LTC3554 is well suited for low power portable device applications, including personal navigation devices (PNDs), media players and handheld medical and industrial devices.

High Efficiency Quad PSE Controller Addresses IEEE 802.3at PoE+ Standard

Mon, 01 Jun 2009 12:32:17 -0400

MILPITAS, CA - June 1, 2009 - Linear Technology Corporation introduces the LTC4266, a 4-port Power over Ethernet (PoE) controller for Power Sourcing Equipment (PSE) required to provide IEEE 802.3at (25.5W) or proprietary higher power levels. Next-generation PoE applications call for more power to support demanding features, while increasing power efficiency in an effort to be more "green" and reduce costs. The LTC4266 provides up to 100W over 4-pair Ethernet cabling and is fully compliant with the new IEEE 802.3at PoE+ standard and backward compatible with the prior IEEE 802.3af PoE standard. To help conserve power, the LTC4266 delivers the lowest-in-industry heat dissipation by using low RDS(ON) MOSFETs and 0.25Ohm sense resistors, eliminating the need for expensive heat sinks and providing a more robust PSE solution.

Boost & Inverting DC/DC Converter for Active Matrix OLED & CCD Bias

Wed, 27 May 2009 13:05:05 -0400

MILPITAS, CA - May 27, 2009 - Linear Technology announces the LT3582, LT3582-5 and LT3582-12 dual channel DC/DC converters which deliver both positive and negative outputs required in many biasing applications such as active matrix OLED (organic light-emitting diode) displays as well as CCD (charge coupled device) applications. The LT3582/-5/-12 offer an I2C interface that can dynamically program output voltages, power sequencing and output voltage ramps as the application requires. Alternatively, these parameters can be set in manufacturing and made permanent via the built in non-volatile OTP (one time programmable) memory. The LT3582’s positive output voltage can be set between 3.2V and 12.775 in 25mV steps, whereas the negative output can be set between -1.2V and -13.95V in 50mV steps. The LT3582-5 and LT3582-12 are preconfigured with ±5V and ±12V outputs respectively, useful in many signal conditioning applications.

Ultralow Power Boost Converter with Dual Half-Bridge Switches

Thu, 21 May 2009 11:31:57 -0400

MILPITAS, CA - May 21, 2009 - Linear Technology announces the LT8415, a low noise micropower boost converter with integrated dual half-bridge switches. The LT8415’s unique design scheme requires only 10.5uA of quiescent current, which is further reduced to 0uA in shutdown. Integrated high value (12.4M/0.4M) output feedback divider resistors enable the LT8415 to regulate a 16V output with less than 70uA of total input current. Its very small 25mA switch current limit enables it to operate very efficiently from high impedance sources, such as coin cell batteries without any inrush current limitation.

Small Footprint 4V-38V Input Voltage Range Synchronous Step-Down DC/DC Controller

Wed, 20 May 2009 16:56:01 -0400

MILPITAS, CA - May 20, 2009 - Linear Technology Corporation announces the LTC3854, a tiny 2mm x 3mm DFN-12 packaged, wide input voltage range synchronous step-down switching DC/DC controller that drives all N-channel power MOSFET stages. The 4V to 38V input range addresses a wide variety of applications, including most intermediate bus voltages and battery chemistries. The strong on-board MOSFET gate drivers enable high power external MOSFETs to produce output currents up to 20A with output voltages ranging from 0.8V to 5.5V. This makes the LTC3854 ideal for point-of-load regulation requirements in datacom, telecom, industrial, automotive, medical and multi-function printer applications.

50V, 20mA Synchronous Buck Converter Delivers 93% Efficiency & Requires Only 12uA Quiescent Current

Tue, 19 May 2009 14:05:53 -0400

MILPITAS, CA - May 19, 2009 - Linear Technology announces the LTC3632, a 50V input-capable synchronous buck converter that delivers up to 20mA of continuous output current from a 3mm x 3mm (or MSOP8-E) package. It operates from an input voltage range of 4.5V to 50V with protection up to 60V, making it ideal for automotive and industrial 4mA to 20mA control loop applications. The LTC3632 utilizes internal synchronous rectification and a programmable peak current mode design to optimize efficiency in lower current applications. It delivers efficiencies as high as 93% and requires only 12uA of quiescent current. The combination of its 3mm x 3mm DFN package (or MSOP-8E) and only three tiny externals provides compact solution footprint for a wide array of applications.

DC/DC Controller Makes Positive or Negative Regulated Voltages

Mon, 18 May 2009 12:01:33 -0400

MILPITAS, CA - May 18, 2009 - Linear Technology Corporation announces the LT3757, a wide input range DC/DC controller for boost, flyback, SEPIC and inverting power supply applications, capable of generating either positive or negative regulated output voltages. The LT3757 has two voltage feedback error amplifiers and reference voltages. One set is for positive output voltages, with a 1.60V reference voltage, the other is for negative output voltages, with a -0.80V reference voltage, both off a single feedback pin, making the LT3757 a highly versatile DC/DC controller for many types of power supply designs.

Tiny 16-Bit ADC Integrates 2ppm/ºC Reference for Space-Constrained Sensor Applications

Wed, 13 May 2009 15:47:06 -0400

MILPITAS, CA - May 13, 2009 - Linear Technology introduces the LTC2460 and the LTC2462, a pair of 16-bit delta sigma ADCs that integrate a precision reference in a tiny 3mm x 3mm DFN package. The integrated reference (2ppm/°C Typ, 10ppm/°C Max) allows precise measurements and alleviates the need for an external reference, a key benefit for space-constrained applications. Both ADCs guarantee 16-bit no missing code resolution. This makes the LTC2460 and LTC2462 a complete solution for remote sensor battery-powered applications and industrial sensors monitoring temperature or pressure.

45V, 100mA Synchronous Buck Converter with Only 12uA Quiescent Current

Tue, 12 May 2009 12:01:24 -0400

MILPITAS, CA - May 12, 2009 - Linear Technology announces the LTC3631, a 45V input-capable synchronous buck converter that can deliver up to 100mA of continuous output current. It operates from an input voltage range of 4.5V to 45V with transient protection up to 60V, making it ideal for automotive and industrial control loop applications. The LTC3631 utilizes internal synchronous rectification and a programmable peak current mode design to optimize efficiency in lower current applications. It delivers efficiencies as high as 92% and requires only 12uA of quiescent current, maximizing battery run time. Its 3mm x 3mm DFN package (or MSOP-8E) and only three tiny externals provides a highly compact solution footprint for a wide array of general purpose applications.

Switching Power Manager with USB On-The-Go & Overvoltage Protection in a Compact 12mm2 Footprint

Wed, 06 May 2009 13:18:35 -0400

MILPITAS, CA - May 6, 2009 - Linear Technology Corporation announces the LTC4160 and LTC4160-1, the latest members in a family of power manager ICs for single-cell Li-Ion/Polymer battery-based applications, including media players, personal navigation devices, digital cameras, PDAs and smart phones. The LTC4160/-1 features a bidirectional switching power manager which can power an application and charge the battery from USB. Operating in reverse, the same switching regulator can take power from the battery to generate 5V and deliver up to 500mA for USB On-The- Go (OTG) applications without any additional components.

Overvoltage Protection Regulator & Inrush Current Limiter Provides Protection Barrier for Intrinsic Safety Applications

Tue, 05 May 2009 11:30:37 -0400

MILPITAS, CA - May 5, 2009 - Linear Technology Corporation introduces the LT4356-3, an overvoltage protection regulator with overcurrent protection and inrush current limiting for high availability systems. The LT4356-3 is a new option offering latchoff operation under fault conditions, and is the latest member of a family of products designed to suppress high voltage surges and currents to protect downstream electronics from damage. The LT4356-3 provides an energy-efficient barrier to limit the amount of electrical and thermal energy available to electrical equipment, an important requirement in Intrinsic Safety applications.

5MHz to 1.6GHz High Linearity Direct Quadrature Modulator Extends Dynamic Range Performance of Wireless Transmitters

Mon, 04 May 2009 12:34:16 -0400

MILPITAS, CA - May 4, 2009 - A new low frequency direct conversion quadrature modulator from Linear Technology Corporation offers superior linearity performance and low noise to enhance the dynamic range performance of basestation transmitters. The LTC5598 offers best-in-class +27.7 dBm OIP3 (Output 3rd Order Intercept) and +74 dBm OIP2 (Output 2nd Order Intercept) performance. In addition, the device has an exceptionally low noise floor of -160 dBm/Hz at a +5 dBm output level. Moreover, the LTC5598 provides -50.4 dBc image rejection and a carrier leakage of -55 dBm. It consumes 20% less power compared to its closest competitor. The combination of function and performance enables design of compact, high performance transmitters for wireless infrastructure equipment.