1. Products
  2. Power Management
  3. Battery Management
  4. Battery Charger IC
  5. Linear Battery Chargers
  6. LTC4075

Data Sheet
PDF
CN | JP
User Guides
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Overview

Features and Benefits

  • Charges Single-Cell Li-Ion Batteries from Wall Adapter and USB Inputs
  • Automatic Input Power Detection and Selection
  • Charge Current Programmable up to 950mA from Wall Adapter Input
  • No External MOSFET, Sense Resistor or Blocking Diode Needed
  • Thermal Regulation Maximizes Charging Rate Without Risk of Overheating*
  • Preset Charge Voltage with ±0.6% Accuracy
  • Programmable Charge Current Termination
  • 18µA USB Suspend Current in Shutdown
  • Independent "Power Present" Status Outputs
  • Charge Status Output
  • Automatic Recharge
  • Available Without Trickle Charge (LTC4075X)
  • Available in a Thermally Enhanced, Low Profile (0.75mm) 10-Lead (3mm × 3mm) DFN Package

Product Details

The LTC4075/LTC4075X are standalone linear chargers that are capable of charging a single-cell Li-Ion battery from both wall adapter and USB inputs. The chargers can detect power at the inputs and automatically select the appropriate power source for charging.

No external sense resistor or blocking diode is required for charging due to the internal MOSFET architecture. Internal thermal feedback regulates the battery charge current to maintain a constant die temperature during high power operation or high ambient temperature conditions. The float voltage is fixed at 4.2V and the charge current is programmed with an external resistor. The LTC4075 terminates the charge cycle when the charge current drops below the programmed termination threshold after the final  float voltage is reached. With power applied to both inputs, the LTC4075/LTC4075X can be put into shutdown mode reducing the DCIN supply current to 20µA, the USBIN supply current to 10µA, and the battery drain current to less than 2µA.

Other features include automatic recharge, undervoltage lockout, charge status outputs, and "power present" status outputs to indicate the presence of wall adapter or USB power.

Trickle Charge Vin Abs Max
LTC4075 Yes 10V
LTC4075X No 10V
LTC4075HVX No 22V

Applications

  • Cellular Telephones
  • Handheld Computers
  • Portable MP3 Players
  • Digital Cameras

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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 Sheets (1)
  • Reliability Data (1)
  • User Guides (1)
  • Application Notes (1)
    • Document Type

    Product Recommendations

    LTC4075 Companion Parts

    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.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
    LTC4075EDD#PBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
    LTC4075EDD#TRPBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
    LTC4075XEDD#PBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
    LTC4075XEDD#TRPBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
    Wafer Fabrication Data R540 Reliability Data

    Support & Discussions

    LTC4075 Contact ADI Technical Support »
    LTC4075 Ask your question »
    LTC4075 Contact ADI Technical Support » LTC4075 Ask your question »

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