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60V Battery Charging Controller & Power Manager

MILPITAS, CA – April 18, 2011 – Linear Technology Corporation introduces the LTC4000, a high voltage controller and power manager that converts virtually any externally compensated DC/DC power supply into a full-featured battery charger. The LTC4000 is capable of driving typical DC/DC converter topologies, including buck, boost,
buck-boost, SEPIC and flyback. The device offers precision input and charge current regulation and operates across a wide 3V to 60V input and output voltage range, compatible with a variety of different input voltage sources, battery stacks and chemistries. Typical applications include high power battery charger systems, high performance portable instruments, battery back-up systems, industrial battery-equipped devices and notebook/subnotebook computers.

The LTC4000 features an intelligent PowerPath™ topology that preferentially provides power to the system load when input power is limited. The LTC4000 controls external PFETs to provide low loss reverse current protection, efficient charging and discharging of the battery and instant-on operation to ensure that system power is available at plug-in even with a dead or deeply discharged battery. External sense resistors and precision sensing enable accurate currents at high efficiency, allowing the LTC4000 to work with converters that span the power range from milliwatts to kilowatts.

LTC4000 Hot Shot

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The LTC4000’s full-featured controller charges a variety of battery chemistries including lithium-ion/polymer/phosphate, sealed lead acid (SLA), and nickel-based. The device also provides charge status indicators through its FLT and CHRG pins. Other features of the battery charger include: ±0.2% programmable float voltage, selectable timer or C/X current termination, temperature-qualified charging using an NTC thermistor, automatic recharge, C/10 trickle charge for deeply discharged cells and bad battery detection.

The LTC4000 is housed in a low profile (0.75mm) 28-pin 4mm x 5mm QFN package and a 28-lead SSOP package. The device is guaranteed for operation from -40°C to 125°C. 1,000-piece pricing starts at $3.95 each. For more information, visit

Summary of Features: LTC4000

  • Implements a Complete High Performance Battery Charger when Paired with a DC/DC Converter (Buck, Buck-Boost, Boost, SEPIC & Flyback)
  • Wide Input & Output Voltage Range:
    3V to 60V
  • Input Ideal Diode for Low Loss Reverse Blocking & Load Sharing
  • Output Ideal Diode for Low Loss PowerPath™ & Load Sharing with the Battery
  • Instant-On Operation with Heavily Discharged Battery
  • Programmable Input & Charge Current:
    ±1% Accuracy
  • Accurate Programmable Float Voltage:
    ±0.2% at Room &
    ±1% over Temperature
  • Programmable C/X or Timer-Based Charge Termination
  • NTC Input for Temperature Qualified Charging
  • 28-Lead 4mm x 5mm QFN or
    SSOP Packages

High Power Charge Controller Interfaces with
Any Switching Regulator


Click Photo for High-Res Image

About Linear Technology

Linear Technology Corporation, a member of the S&P 500, has been designing, manufacturing and marketing a broad line of high performance analog integrated circuits for major companies worldwide for three decades. The Company's products provide an essential bridge between our analog world and the digital electronics in communications, networking, industrial, automotive, computer, medical, instrumentation, consumer, and military and aerospace systems. Linear Technology produces power management, data conversion, signal conditioning, RF and interface ICs, and µModule® subsystems.

LT, LTC, LTM, µModule and are registered trademarks and PowerPath is a trademark of Linear Technology Corp. All other trademarks are the property of their respective owners.

Worldwide Contacts

North America and General Information
John Hamburger
Tel: (408) 432-1900 ext. 2419

Doug Dickinson
Tel: (408) 432 1900 ext. 2233
  China (PRC)
Fanny Lau
Tel: 852-2428-0303

Angela Ao
Tel: (8610)6522 8081
Yoshikazu Funasaki
Tel: 81-3-5226-7291

Hitoshi Kasai
Tel: +0422-47-5319

Ralf Stegmann
Tel: +49 (0) 7131 9234-11
Clotilde Zeller
Tel: +33 1 4614 87 09

Desiree Park
Tel: +82-2-565-6625

UK & Nordic
Alan Timmins
Tel: +44-1252-629937

Simona Labianca
Tel: +39 340 0571697
Alice Wang
Tel: + 886-2-28974705

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