1. Products
  2. Power Management
  3. Battery Management
  4. USB Power Manager (PowerPath, Battery Charger)
  5. LTC4099

New Content (1)


Features and Benefits

  • Switching Regulator with Bat-Track Adaptive Output Control Makes Optimal Use of Limited Input Power
  • I2C Port for Optimal System Performance and Status Information
  • Input Overvoltage Protection
  • Bat-Track Control of External Step-Down Switching Regulator Maximizes Efficiency from Automotive and Other High Voltage Sources
  • Instant-On Operation with Low Battery
  • Optional Overtemperature Battery Conditioner Improves High Temperature Battery Safety Margin
  • Ideal Diode Seamlessly Connects Battery When Input Power is Limited or Unavailable
  • Full-Featured Li-Ion/Polymer Battery Charger
  • 1.5A Maximum Charge Current with Thermal Limiting
  • Slew Control Reduces Switching EMI
  • 20-Lead 3mm × 4mm × 0.75mm QFN Package

Product Details

The LTC4099 is an I2C controlled high efficiency USB PowerPath controller and full-featured Li-Ion/Polymer battery charger. It seamlessly manages power distribution from multiple sources including USB, a wall adapter and a Li-Ion/Polymer battery.

The LTC4099 automatically limits its input current for USB compatibility. For automotive and other high voltage applications, the LTC4099 interfaces with an external switching regulator. Both the USB input and the auxiliary input controller feature Bat-Track optimized charging to provide maximum power to the application and reduced heat in high power density applications.

The I2C port allows digital control of important application parameters including input current limit, charge current and float voltage. Several status bits can also be read back via I2C.

An overvoltage protection circuit guards the LTC4099from high voltage damage on the low voltage VBUS pin.TheLTC4099 is available in a 20-Lead 3mm × 4mm × 0.75mmQFN Package.


  • Media Players
  • Portable Navigation Devices
  • Smart Phones
  • Industrial Handhelds
  • Portable Medical Instruments

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Product Recommendations

LTC4099 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
LTC4099EUDC#PBF Material Declaration Reliability Data 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)
LTC4099EUDC#TRPBF Material Declaration Reliability Data 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)
Wafer Fabrication Data R540 Reliability Data

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

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Price Table Help


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.