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SC1153CSW Datasheet(PDF) 1 Page - Semtech Corporation |
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SC1153CSW Datasheet(HTML) 1 Page - Semtech Corporation |
1 / 7 page SC1153 PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 PRELIMINARY - October 3, 2000 1 Pentium is a registered trademark of Intel Corporation BLOCK DIAGRAM PIN CONFIGURATION Top View (20-Pin SOIC) DESCRIPTION The SC1153 is a low-cost, full featured, synchronous voltage-mode controller designed for use in single ended power supply applications where efficiency is of primary concern. Synchronous operation allows for the elimination of heat sinks in many applications. The SC1153 is ideal for implementing DC/DC converters needed to power advanced microprocessors, such as Pentium ® lll, in both single and multiple processor con- figurations. Internal level-shift, high-side drive circuitry, and preset shoot-thru control, allows for use of inex- pensive n-channel power switches. SC1153 features include an integrated 5-bit VID DAC, temperature compensated voltage reference, triangle wave oscillator, current limit comparator, frequency shift over-current protection, and an accessible, inter- nally compensated error amplifier. Power good signal- ing, logic compatible shutdown, and over voltage pro- tection are also provided. The SC1153 operates at a fixed 200KHz, providing an optimum compromise between efficiency, external component size, and cost. FEATURES •= Low cost / full featured •= Synchronous operation •= 5 Bit VID programmable output •= On-chip power good and OVP functions •= Designed to meet Intel VRM 8.4 (Pentium® IlI) •= 1.3V to 3.5V Range, 1% tolerance APPLICATIONS •= Pentium® IlI Core Supply •= Multiple Microprocessor Supplies •= Voltage Regulator Modules (VRM) •= Programmable Power Supplies •= High Efficiency DC/DC Conversion TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com DEVICE (1) PACKAGE TEMP. RANGE (T J) SC1153CSW.TR SO-20 0 - 125°C ORDERING INFORMATION Note: (1) Only available in tape and reel packaging. A reel contains 1000 devices. 1.25V REF D/A CURRENT LIMIT OSCILLATOR 200kHz ERROR AMP S Q R 70mV OPEN COLLECTORS UPPER FET LEVEL SHIFT AND DRIVE SHOOT-THRU CONTROL SYNCHRONOUS FET DRIVE VCC OVP PWRGOOD VOSENSE VID4 VID3 VID2 VID1 VID0 VCC CS- CS+ SHUTDOWN BSTH DH PGNDH BSTL DL PGNDL GND |
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