FEATURES
s Programmable Charge Current Up to 800mA s No MOSFET, Sense Resistor or Blocking Diode Required s Complete Linear Charger in ThinSOTTM Package for Single Cell Lithium-Ion Batteries s Constant-Current/Constant-Voltage Operation with Thermal Regulation* to Maximize Charge Rate Without Risk of Overheating s Charges Single Cell Li-Ion Batteries Directly from USB Port s Preset 4.2V Charge Voltage with ±1% Accuracy s Charge Current Monitor Output for Gas Gauging* s Automatic Recharge s Charge Status Output Pin s C/10 Charge Termination s 25µA Supply Current in Shutdown s 2.9V Trickle Charge Threshold (LTC4054) s Available Without Trickle Charge (LTC4054X) s Soft-Start Limits Inrush Current s Available in 5-Lead SOT-23 Package U APPLICATIO S s Cellular Telephones, PDAs, MP3 Players s Charging Docks and Cradles s Bluetooth APPLICATIONS
DESCRIPTIO The LTC®4054 is a complete constant-current/constantvoltage linear charger for single cell lithium-ion batteries. Its ThinSOT package and low external component count make Furthermore, the LTC4054 is specifically designed to work within USB power specifications.
Linear Technology
