1. Products
  2. Power Management
  3. Battery Management
  4. USB Power Manager (PowerPath, Battery Charger)
  5. LTC4156

Alternative Parts


Features and Benefits

  • High Efficiency Charger Capable of 3.5A Charge Current
  • Charge Control Algorithm Specifically Designed for LiFePO4 Batteries (Lithium Iron Phosphate)
  • 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
  • Four Float Voltage Settings (3.45V, 3.55V, 3.6V, 3.8V)
  • 28-Lead 4mm × 5mm QFN Package

Product Details

The LTC4156 is a 15 watt I2C controlled power manager with PowerPath instant-on operation, high efficiency switching battery charging and USB compatibility. The LTC4156 seamlessly manages power distribution from two 5V sources, such as a USB port and a wall adapter, to a single-cell rechargeable lithium iron phosphate battery and a system load.

The LTC4156’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 LTC4156 from high voltage damage on the VBUS pin.

The LTC4156 is available in the low profile (0.75mm) 28-lead 4mm × 5mm QFN surface mount package.


  • Portable Medical Devices
  • Portable Industrial Devices
  • Backup 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)

Product Recommendations

LTC4156 Companion Parts

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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.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
LTC4156EUFD#PBF Material Declaration Reliability Data 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)
LTC4156EUFD#TRPBF Material Declaration Reliability Data 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)
LTC4156IUFD#PBF Material Declaration Reliability Data 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)
LTC4156IUFD#TRPBF Material Declaration Reliability Data 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)
Wafer Fabrication Data R540 Reliability Data

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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

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. 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.