SC1151 Datasheet | SEMTECH

DESCRIPTION The SC1151 voltage mode controller contains most of the circuitry necessary to implement a DC/DC converter for powering advanced microprocessors such as Klamath, both in single and multiple processor configurations. The SC1151 Features an integrated 5 bit D/A converter, pulse by pulse current limiting, integrated power good signaling, logic patible shutdown and on-board over voltage protection (OVP). The SC1151 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 1.80V to 2.05V in 50m V increments with no external ponents. The SC1151 provides an OVP output which can be used to trigger a crowbar circuit for true over voltage protection. Features - - - - 85% efficiency 5 bit DAC for output programmability On chip power good and OVP functions Designed for Intel Klamath VRM8.1 requirements APPLICATIONS - - - - Klamath microprocessor supplies Klamath VRM modules 1.8V to 3.5V microprocessor supplies Programmable power supplies ORDERING INFORMATION DEVICE (1) PACKAGE SO-16 TEMP RANGE (TJ) 0° to 125°C SC1151CS Note: (1) Add suffix ‘TR’ for tape and reel. BLOCK DIAGRAM VCC CSm CSp SHUTDOWN ABSOLUTE MAXIMUM RATINGS Parameter Symbol VIN Maximum -0.3 to 7 ±1 -0.3 to 15 TA TSTG TLEAD 0 to 70 -65 to +150 300 Units V V V °C °C °C 1.25V REF VCC 70m V CURRENT LIMIT BST + VCC to GND PGND to GND BST to GND VID4 VID3 VID2 VID1 VID0 D/A AND SHUTDOWN LOGIC DECODED SHUTDOWN SIGNAL LEVEL SHIFT AND DRIVE R OSCILLATOR S Q PGND DH VOSENSE + + + PWRGOOD + VCC + ERROR...