Datasheet Linear Technology LTC4081EDD#TRPBF — Ficha de datos

LTC4081
500mA Li-Ion Charger
with NTC Input and
300mA Synchronous Buck
DESCRIPTION FEATURES
Battery Charger:
nn Constant-Current/Constant-Voltage Operation
with Thermal Feedback to Maximize Charge Rate
withoutВ Risk of Overheating
nn Internal 4.5-Hour Safety Timer for Termination
nn Charge Current Programmable Up to 500mA with
5% Accuracy
nn NTC Thermistor Input for Temperature Qualified
Charging
nn C/10 Charge Current Detection Output
nn 5ВµA Supply Current in Shutdown Mode
Switching Regulator:
nn High Efficiency Synchronous Buck Converter
nn 300mA Output Current (Constant-Frequency Mode)
nn 2.7V to 4.5V Input Range (Powered from BAT Pin)
nn 0.8V to V
BAT Output Range
nn MODE Pin Selects Fixed (2.25MHz) Constant-Frequency …