SC1165 Datasheet | SEMTECH

PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER, DUAL LOW DROPOUT REGULATOR CONTROLLER October 25, 1999 SC1164/5 TEL:805-498-2111 FAX:805-498-3804 WEB:http://.semtech. DESCRIPTION The SC1164/5 bines 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. The SC1164/5 switching section Features an integrated 5 bit D/A converter, pulse by pulse current limiting, integrated power good signaling, and logic patible shutdown. The SC1164/5 switching section operates at a fixed frequency of 200k Hz, providing an optimum promise between size, efficiency and cost in the intended application areas. The integrated D/A converter provides programmability of output voltage from 2.0V to 3.5V in 100m V increments and 1.30V to 2.05V in 50m V increments with no external ponents. The SC1164/5 linear sections are low dropout regulators. The SC1164 supplies 1.5V for GTL bus and 2.5V for non-GTL I/O. For the SC1165 both LDO’s are adjustable. Features - Synchronous design, enables no heatsink solution - 95% efficiency (switching section) - 5 bit DAC for output programmability - On chip power good function - Designed for Intel Pentium® ll requirements - 1.5V, 2.5V or Adj. @ 1% for linear section APPLICATIONS - Pentium® ll or Deschutes microprocessor supplies - Flexible motherboards - 1.3V to 3.5V microprocessor supplies - Programmable triple power supplies ORDERING INFORMATION Part Number (1) Package Linear Voltage Temp. Range (TJ) SC1164CSW SC1165CSW SO-24 SO-24 1.5V/2.5V 0° to 125°C Adj. 0° to 125°C Note: (1) Add suffix ‘TR’ for tape and reel. PIN CONFIGURATION BLOCK...