DESCRIPTION

The SC1155 is a synchronous-buck switch-mode controller designed for use in single ended power supply applications where efficiency is the primary concern. The controller is a hysteretic type, with a user selectable hysteresis. The SC1155 is ideal for implementing DC/DC converters needed to power advanced microprocessors such as Pentium® llI and Athlon®, in both single and multiple processor configurations. Inhibit, under-voltage lockout and soft-start functions are included for controlled power-up.

FEATURES

◆ Programmable hysteresis

◆ 5 bit DAC programmable output (1.1V-1.85V)

◆ On-chip power good and OVP functions

◆ Designed to meet latest Intel specifications

◆ Up to 95 efficiency

◆ ±1 voltage tolerance over temperature

APPLICATIONS

◆ Server Systems and Workstations

◆ Intel Pentium® III Core Supplies

◆ AMD Athlon® Core Supplies

◆ Multiple Microprocessor Supplies

◆ Voltage Regulator Modules