SC908

SC908 Power Management IC for www.DataSheet4U.com Single-Cell Li-Ion Devices POWER MANAGEMENT Features „ „ „ „ „ „ „ „ „ „ „ „ „ „ Description The SC908 is a complete power management system designed for use in Bluetooth wireless headsets, portable media players, and other battery-powered electronics where size is critical. 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 28V max input voltage protects against hotplug overshoot and faulty adapters without additional protection circuitry. 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. The low battery detector warns when the battery level is below 3.3V, and when the battery h...