1. Products
  2. Power Management
  3. Battery Management
  4. Battery Charger Plus DC/DC
  5. LTC4080X


Features and Benefits

  • Complete Linear Battery Charger with Integrated  Buck Converter
  • Available in 10-lead, low profile (0.75 mm) 3mm × 3mm DFN and 10-lead MSE packages
Battery Charger:
  • Constant-Current/Constant-Voltage Operation  with Thermal Feedback to Maximize Charge Rate  Without Risk of Overheating 
  • Internal 4.5 Hour Safety Timer for Termination 
  • Charge Current Programmable Up to 500mA with  5% Accuracy
  • C/10 Charge Current Detection Output
  • 5µA Supply Current in Shutdown Mode
Switching Regulator:
  • High Efficiency Synchronous Buck Converter300mA Output Current (Constant-Frequency Mode)
  • 2.7V to 4.5V Input Range (Powered from BAT Pin)
  • 0.8V to VBAT Output Range
  • MODE Pin Selects Fixed (2.25MHz) Constant
  • Frequency PWM Mode or Low ICC (23µA) Burst Mode®  Operation
  • 2µA BAT Current in Shutdown Mode

Product Details

The LTC4080X is a complete constant-current/constant-voltage linear battery charger for a single-cell 4.2V lithium-ion/polymer battery with an integrated 300mA synchronous buck converter. A 3mm × 3mm DFN package and low external component count make the LTC4080X especially suitable for portable applications. Furthermore, the LTC4080X is specifically designed to work within USB power specifications.

The CHRG pin indicates when charge current has dropped to ten percent of its programmed value (C/10). An internal 4.5 hour timer terminates the charge cycle. The full-featured LTC4080X battery charger also includes automatic recharge and soft-start to limit inrush current. If trickle charging is desired, refer to the LTC4080 datasheet.

The LTC4080X integrates a synchronous buck converter that is powered from the BAT pin. It has an adjustable output voltage and can deliver up to 300mA of load current. The buck converter also features low-current high-efficiency Burst Mode operation that can be selected by the MODE pin.

The LTC4080X is available in 10-lead, low profile (0.75 mm) 3mm × 3mm DFN and 10-lead MSE packages.

Trickle Charge Package
LTC4080 Yes DFN-10
LTC4080X No DFN-10, MS-10


  • Wireless Headsets
  • Bluetooth Applications
  • Portable MP3 Players
  • Multifunction Wristwatches

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.

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
LTC4080XEDD#PBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
LTC4080XEDD#TRPBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
LTC4080XEMSE#PBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
LTC4080XEMSE#TRPBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
Wafer Fabrication Data R540 Reliability Data

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Buy Now Pricing

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List Pricing

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Lead Times

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



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