Patent ID: 8258770

Claim:
A multi-phase voltage regulator module connected to a central processing unit and operated in one of a high-load mode and a low-load mode, comprising: a pulse-width-modulation controller generating a plurality of phase-width-modulation signals and a phase-control signal; and a plurality of phase circuits, each of which receives a corresponding one of the phase-width-modulation signals and generates a corresponding core voltage to the central processing unit; wherein a first portion of the phase circuits are activated when the multi-phase voltage regulator module is operated in the low-load mode at a first time, and, a second portion of the phase circuits are activated when the multi-phase voltage regulator module is operated in the low-load mode at a second time, wherein first portion and the second portion of the phase circuits are activated by the phase-control signal randomly, the first portion being non-identical to the second portion.