Alternative Parts


Features and Benefits

  • High Efficiency Charger Capable of 3.5A Charge Current
  • Monolithic Switching Regulator Makes Optimal Use of Limited Power and Thermal Budget
  • Dual Input Overvoltage Protection Controller
  • Priority Multiplexing for Multiple Inputs
  • I2C/SMBus Control and Status Feedback
  • NTC Thermistor ADC for Temperature Dependent Charge Algorithms (JEITA)
  • Instant-On Operation with Low Battery
  • Battery Ideal Diode Controller for Power Management
  • USB On-The-Go Power Delivery to the USB Port
  • Full Featured Li-Ion/Polymer Battery Charger with Four Float Voltage Settings
  • 28-Lead 4mm × 5mm QFN Package

Product Details

The LTC4155 is a 15 watt I2C controlled power manager with PowerPath instant-on operation, high efficiency switching battery charging and USB compatibility. The LTC4155 seamlessly manages power distribution from two 5V sources, such as a USB port and a wall adapter, to a single-cell rechargeable Lithium-Ion/Polymer battery and a system load.

The LTC4155’s switching battery charger automatically limits its input current for USB compatibility, or may draw up to 3A from a high power wall adapter. The high efficiency step-down switching charger is designed to provide maximum power to the application and reduced heat in high power density applications.

I2C adjustability of input current, charge current, battery float voltage, charge termination, and many other parameters allows maximum flexibility. I2C status reporting of key system and charge parameters facilitates intelligent control decisions. USB On-The-Go support provides 5V power back to the USB port without any additional components. A dual-input, priority multiplexing, overvoltage protection circuit guards the LTC4155 from high voltage damage on the VBUS pin.

The LTC4155 is available in the low profile 28-lead 4mm × 5mm × 0.75mm QFN surface mount package.


  • Tablet PCs
  • Ultra Mobile PCs
  • Video Media Players
  • Digital Cameras, GPS, PDAs
  • Smart Phones
  • Portable Medical Devices

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Software & Systems Requirements

Evaluation Software

Tools & Simulations


Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.

Linduino code repository on GitHub and instructions on how to use the code.

Purchase Linduino


Product Recommendations

LTC4155 Companion Parts

Recommended µModule Isolator

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

Sample & Buy

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Buy Now Pricing

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List Pricing

(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Lead Times

Please see the latest communication from our CCO regarding lead times.



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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.