DESCRIPTION

The SC1402 is pin compatible with the MAX1632 with improved load regulation performance. The SC1402 is a multiple-output power supply controller designed to power logic supply components in battery operated systems. The SC1402 utilizes synchronous rectified buck topologies to generate two voltages, (3.3V and 5V) with up to 95 efficiency. It also provides two linear regulators for system housekeeping functions. The 12V linear regulator output is generated from a coupled inductor of the 5V switching regulator.

FEATURES

• 6V to 30V Input range

• 3.3V and 5V dual synchronous rectified outputs

• Fixed frequency or PSAVE for maximum efficiency over wide load current range

• 5V/50mA linear regulator

• 12V/120mA linear regulator

• Precision 2.5V reference output

• Programmable power-up sequence

• Power good output (RESET)

• Output over current protection

• Output over voltage protection

• Output under voltage shut down

• 4µA typical shut down current

• 7mW typical quiescent power

APPLICATIONS

• Notebook and subnotebook computers

• PDAs and Mobile communicators

• Desktop DC-DC converters