SC1159

www.DataSheet4U.com Programmable Synchronous DC/DC Hysteretic Controller with VRM 8.5 VID Range POWER MANAGEMENT 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. SC1159 features include an integrated 5 bit D/A converter, temperature compensated voltage reference, current limit comparator, over-current protection, and an adaptive deadtime circuit to prevent shoot-through of the power MOSFET during switching transitions. Power good signaling, logic compatible shutdown, and over-voltage protection are also provided. The integrated D/A converter provides programmability of output voltage from 1.050V to 1.825V in 25mV increments. The SC1159 high side driver can be configured as either a ground-referenced or as a floating bootstrap driver. The high and low side MOSFET drivers have a peak current rating of 2 amps. SC1159 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% toler...