PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER, DUAL LOW DROPOUT
REGULATOR CONTROLLER
August 25, 1998
SC1182/3
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.
semtech.
com
DESCRIPTION
The SC1182/3 combines a synchronous voltage mode controller with two low-dropout linear
regulators providing most of the circuitry necessary to implement three DC/DC converters for powering advanced ® microprocessors such as Pentium II (Klamath) or Deschutes.
The SC1182/3 switching section features an integrated 5 bit D/A converter, pulse by pulse current limiting, integrated power good signaling, and logic compatible shutdown.
The SC1182/3 switching section operates at a fixed frequency of 200kHz, providing an op...