DESCRIPTION

The LTC® 4065L is a complete constant-current/constant voltage linear charger for single-cell lithium-ion batteries. Its small size and ability to accurately regulate low charge currents make the LTC4065L especially well-suited for portable applications using low capacity rechargeable lithium-ion cells. Furthermore, LTC4065L is specifically designed to work within USB power specifications.

FEATURES

Charge Current Programmable up to 250mA with  5% Accuracy

Complete Linear Charger in 2mm ×2mm DFN Package

C/10 Charge Current Detection Output

Timer Termination

No External MOSFET, Sense Resistor or Blocking Diode Required

Preset Float Voltage with 0.6% Accuracy:

    4.2V for LTC4065L/LTC4065LX

    4.1V for LTC4065L-4.1

Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charging Rate  Without Risk of Overheating

Charge Current Monitor Output for Gas Gauging

Automatic Recharge

Charges Single Cell Li-Ion Batteries Directly from USB Port

20μA Supply Current in Shutdown Mode

Available Without Trickle Charge (LTC4065LX)

Tiny 6-Lead (2mm ×2mm) DFN Package

APPLICATIONS

Charger for Li-Ion Coin Cell Batteries

Portable MP3 Players, Wireless Headsets

Bluetooth Applications

nMultifunction Wristwatches