Patent ID: 7777461

Claim:
A power supply system comprising: a multiphase switching power converter for delivering power from an input source to a load, the multiphase switching power converter comprising two or more switching power conversion phases, each power conversion phase comprising a respective first switch, and a controller configured to: monitor an output voltage from the multiphase power converter; based on the monitoring, detect: i) a magnitude of an error signal representing a difference between the output voltage and a predetermined setpoint value, and ii) a rate-of-change associated with the output voltage; turn on the phase switches in a sequence, the time between the turning-on of successive switches under steady-state load conditions defining a phase period, and in response to detecting that the rate-of-change associated with the output voltage exceeds a slope threshold, determine a duration of a modified phase period, the length of the modified phase period depending on the magnitude of the error signal.