FAN5029

The FAN5029 is a multi-phase buck switchingregulator controller optimized to convert a 12V inputsupply to the processor core voltage required by highperformanceIntel? 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. It outputs a PWM toexternal MOSFET drivers that, in turn, drive theswitching power MOSFETs. The switching frequencyof the design is programmable by a single resistorvalue and the number of phases can be programmedto support 2-, 3-, 4-, or 5-phase applications.

The FAN5029 also includes programmable no-loadoffset and droop functions to adjust the output voltageas a function of the load current, as required by theIntel specifications. The FAN5029 also provides anaccurate and reliable short-circuit protection functionwith an adjustable over-current set point.

The FAN5029 is specified over the extendedcommercial temperature range of 0?C to +85?C and isavailable in a 40-lead MLP package.