DESCRIPTION
The SC1157 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 SC1157 is ideal for implementing DC/DC converters needed to power advanced microprocessors such as Pentium® ll (Klamath), in both single and multiple processor configurations. Internal level-shift, high-side drive circuitry, and preset shoot-thru control, allows for use of inexpensive n-channel power switches.

FEATURES
 • Low cost / full featured
 • Synchronous operation
 • 4 Bit VID DAC programmable output (1% tolerance)
 • Designed to meet Intel VRM8.2 (Pentium® II)
 • 1.5% Reference

APPLICATIONS
 • Pentium® II Core Supply
 • Multiple Microprocessor Supplies
 • Voltage Regulator Modules (VRM)
 • Programmable Power Supplies
 • High Efficiency DC/DC Conversion