FAN5031

The FAN5031 device is a multi-phase buck switchingregulator controller, that is optimized to convert a 12Vinput supply to the processor core voltage required byhigh performance Intel processors. It has an internal 8-bitDAC that converts a digital voltage identification (VID)code, that is sent from the processor, to set the outputvoltage between 0.5V and 1.6V in 6.25 mV steps. It outputsa PWM signals to external MOSFET drivers that, inturn, drive the switching power MOSFETs. The switchingfrequency of the design is easily programmable by asingle resistor value and the number of phases can beprogrammed to support 2, 3, or 4 phase applications.The FAN5031 also includes programmable no-load offsetand droop functions to adjust the output voltage as afunction of the load current, as required by the Intel specifications.The FAN5031 also provides an accurate andreliable short circuit protection function with an adjustableover current set-point.The FAN5031 is specified over the commercial temperaturerange of 0?C to +85?C and is available in a 40-leadMLP package.