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  6. LTC4056-4.2

Data Sheet
PDF
User Guide
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Overview

Features and Benefits

  • Standalone Li-Ion Charger with Termination
  • Programmable Termination Timer
  • No Sense Resistor or Blocking Diode Required
  • Suitable for USB-Powered Charging
  • Undervoltage Charge Current Limiting
  • Preset Charge Voltage with ±0.6% Accuracy
  • Programmable Charge Current: 200mA to 700mA
  • Automatic Recharge with Shortened Charge Cycle
  • Self-Protection for Overcurrent/Overtemperature
  • 40µA Supply Current in Shutdown Mode
  • Negligible Battery Drain Current in Shutdown
  • Low Battery Charge Conditioning (Trickle Charging)
  • CHRG Status Output including AC Present
  • PCB Total Solution Area only 75mm² (700mA)
  • Low Profile (1mm) SOT-23 Package

Product Details

The LTC4056 is a low cost, single-cell, constant-current/ constant-voltage Li-Ion battery charger controller with a programmable termination timer. When combined with a few external components, the LTC4056 forms a very small standalone charger for single cell lithium-ion batteries.

Charge current and charge time are set externally with a single resistor and capacitor, respectively. The LTC4056 charges to a final float voltage accurate to ±0.6%. Manual shutdown is accomplished by grounding the TIMER/ SHDN pin, while removing input power automatically puts the LTC4056 into a sleep mode. Both the shutdown and sleep modes drain near zero current from the battery; the shutdown mode reduces supply current to 40µA.

The output driver is both current limited and thermally protected to prevent operating outside of safe limits. No external blocking diode or sense resistor is required. The LTC4056 also includes low battery charge conditioning (trickle charging), undervoltage charge current limiting, automatic recharge and a charge status output.

The LTC4056 is available in a low profile (1mm) 8-lead SOT-23 (ThinSOT™) package.

Applications

  • Cellular Telephones
  • Handheld Computers
  • Digital Cameras
  • Charging Docks and Cradles
  • Low Cost and Small Size Chargers

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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)

Documentation & Resources

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  • Data Sheet (1)
  • Reliability Data (1)
  • User Guide (1)
  • Application Note (1)
  • Technical Article (1)
    • Document Type

    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
    LTC4056ETS8-4.2#TRMPBF Material Declaration Reliability Data 8-Lead SOT-23
    LTC4056ETS8-4.2#TRPBF Material Declaration Reliability Data 8-Lead SOT-23
    Wafer Fabrication Data R421 Reliability Data

    Support & Discussions

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    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.

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