Patent ID: 8049482

Claim:
In a multiphase pulse-width modulated voltage regulator system providing synchronous pulse width modulated pulses for regulating voltage at a load, a method of detecting deviations from a pre-determined output voltage level comprising the steps of: setting a threshold at which a deviation from the pre-determined voltage level in a first direction is detected; setting multiple thresholds at which deviations from the desired voltage in a second direction are detected; detecting when one or more of the multiple thresholds has been exceeded; and providing an output that is adjusted in accordance with the number of multiple thresholds that have been exceeded wherein providing the adjusted output comprises: detecting a current at an output stage of the pulse-width modulated voltage regulator system; providing the detected current to a filter; and adjusting, a bandwidth of the filter when detecting that one or more of the multiple thresholds has been exceeded.