Datasheet Linear Technology LTC4080EDD#TRPBF — 数据表

LTC4080
500mA Standalone Li-Ion
Charger with Integrated
300mA Synchronous Buck
DESCRIPTION FEATURES
nn Complete Linear Battery Charger with Integrated
Buck Converter The LTCВ®4080 is a complete constant-current/constantvoltage linear battery charger for a single-cell 4.2V
lithium-ion battery with an integrated 300mA synchronous
buck converter. The small packages and low external
component count make the LTC4080 especially suitable
for portable applications. Furthermore, LTC4080 is specifically designed to work within USB power specifications. Battery Charger:
nn Constant-Current/Constant-Voltage Operation
withВ Thermal Feedback to Maximize Charge Rate
without Risk of Overheating
nn Internal 4.5-Hour Safety Timer for Termination
nn Charge Current Programmable Up to 500mA with
5% Accuracy
nn C/10 Charge Current Detection Output
nn 5ВµA Supply Current in Shutdown Mode 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 LTC4080 battery charger also includes
trickle charge, automatic recharge and soft-start (to limit …