HIGH PERFORMANCE SYNCHRONOUS BUCK CONTROLLER WITH LDO FOR PORTABLE POWER
November 21, 2000
SC1401
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.
semtech.
com
DESCRIPTION
The SC1401 is a synchronous buck
regulator designed to power the latest generation microprocessors in battery operated systems.
The SC1401 may be used to provide both the I/O and core voltages utilizing synchronous rectification for the core supply voltage and an LDO N-Channel MOSFET controller for the I/O supply voltage.
A 1.
25 volt reference allows lower output voltages required by today’s portable microprocessors.
The synchronous buck
regulator is capable of achieving efficiencies up to 95%.
The gate drive circuitry c...