Description
The SC1159 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 SC1159 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 (1.050V-1.825V)
◆ On-chip power good and OVP functions
◆ Designed to meet latest Intel specifications
◆ Up to 95% efficiency
◆ +1% tolerance over temperature

Applications
◆ Server Systems and Workstations
◆ Pentium® III Core Supplies
◆ AMD Athlon® Core Supplies
◆ Multiple Microprocessor Supplies
◆ Voltage Regulator Modules