Description

The FAN5031 device is a multi-phase buck switching regulator controller, that is optimized to convert a 12V input supply to the processor core voltage required by high performance Intel processors. It has an internal 8-bit DAC that converts a digital voltage identification (VID) code, that is sent from the processor, to set the output voltage between 0.5V and 1.6V in 6.25 mV steps.

Features

■ Selectable 2, 3, or 4 phase operation at up to 1MHz per phase

■ ±7.7mV worst-case differential sensing error over temperature

■ Active current balancing between the output phases

■ Power good and Crowbar blanking supports on-the-fly VID code changes

■ 0.5V to 1.6V output

■ Fully compliant to both Intel’s VR10 and VR11 specifications

■ Selectable VR10 extended (7 bit) and VR11 (8 bit) VID tables

■ Programmable soft start ramp

■ Programmable short circuit protection and latch-off delay

Applications

■ Desktop PC/Server processor power supplies for existing and next generation Intel processors

■ VRM modules