SC198

Dual DC-DC Buck Converter with High Current Capability www.DataSheet4U.com POWER MANAGEMENT Description The SC198 is a high-efficiency, dual synchronous buck converter designed for use in low power applications. Each converter is capable of supplying up to 600mA of average current at one of eight programmable output voltages commonly used as microprocessor supply voltages. The SC198 uses a single control logic block for the two converters, but their controls can be set independently. The SC198 employs a flexible clocking scheme that allows the user to use the fixed internal 1MHz oscillator or synchronize the clock to an external source. The device also has an optional power-save mode that optimizes efficiency for light loads. The SC198 provides output voltage flexibility while conserving board space by using control pins to select the output voltage instead of external resistor voltage divider circuits. This eliminates at least four parts from the traditional dual buck converter bill of materials. SC198 Features Dual buck converters with independent control High efficiency - over 90% peak 8 programmable output voltages Input voltage range between 2.7V to 5.5V Fixed-frequency operation - 1MHz Optional SYNC clock input Optional power-save under light-load conditions Shutdown current <1μA Soft-start to limit in-rush current 4mm x 4mm MLPQ package Applications Mobile phones Cordless phones MP3 players Digital cameras PDAs Single li-ion cell or (3) NiMH/NiCd cell devices Digital mult...