FEATURES
DESCRIPTION
Included are a full featured standalone Li-Ion battery charger with a programmable low-battery monitor, a low noise LDO regulator, and a DCDC buck converter. Battery charging features include programmable precharge, fast-charge, and termination current settings. Charge termination is controlled by a programmable timer and by a resistor that sets the termination current. The battery voltage Kelvin sense input eliminates errors due to high charging currents. A battery thermistor interface disables charging when the battery temperature exceeds safe-to-charge limits. The step-down switching regulator (buck converter) improves system efficiency and extends battery life. The LDO regulator can be powered directly from the battery or from the buck converter output when efficiency is critical. The fast-starting low noise LDO regulator is suitable for audio, RF, or general purpose regulation required by peripheral devices, such as a vibrating alert motor.
Semtech Corporation
