Patent ID: 7023672

Claim:
A digitally controlled voltage regulator comprising: a plurality of power integrated circuits adapted for coupling to a load having variable power requirements and for providing regulated power to said load, at least one of said plurality of power integrated circuits also sensing voltages at said load; wherein at least one of said power integrated circuits comprises a window comparator sensing voltage variations at said load and providing an output that initiates an active transient response to voltage variations sensed at said load, said window comparator comprising a first digital to analog converter providing a signal to a first comparator enabling it to provide a high active transient response signal and a second digital to analog converter providing a signal to a second comparator enabling it to provide a low active transient response signal; a control integrated circuit coupled to said plurality of power integrated circuits for providing digital control signals to said plurality of power integrated circuits and for receiving digital signals from said power integrated circuits; said control integrated circuit adjusting the digital control signals in response to the signals received from said power integrated circuits.