Patent ID: 7919955

Claim:
A multiphase power regulator, comprising: a multiphase pulse width modulator; an output stage, comprising a high side FET, a low side FET, and an inductor coupled to the multiphase pulse width modulator; an active transient response circuit coupled between the output stage and the multiphase pulse width modulator and configured to detect the voltage level at the output stage and provide a signal to the multiphase pulse width modulator that is a function of the amplitude of the deviation of the detected voltage level from a target voltage; and an adaptive voltage positioning circuit (AVP) for determining the target voltage, wherein the adaptive voltage positioning circuit comprises: a first circuit for receiving a signal indicative of an active transient response event; a second circuit for sensing a current at the output stage; and a filter circuit coupled to an output of the first and second circuits, a bandwidth of the filter circuit being changed in response to a signal from the first circuit when a signal indicative of an active transient response event is received.