Patent ID: 7550956

Claim:
An apparatus comprising: a first supply node to receive an input voltage; a switch node to provide a switch voltage to an output circuit; a sense node to provide a sense voltage based on an output voltage at an output node of the output circuit; a control circuit to couple the switch node to the first supply node through a first circuit path based on a feedback voltage, and to decouple the switch node from the first supply node based on the feedback voltage, wherein the control circuit is configured to couple the switch node to the first supply node in a first time interval of a switching cycle, and configured to decouple the switch node from the first supply node in a second time interval of the switching cycle, and wherein the compensation circuit is configured to modify the feedback voltage for a time interval less than a time interval of the switching cycle; a feedback circuit including a feedback node to provide the feedback voltage based on the sense voltage; and a compensation circuit to modify the feedback voltage based on the sense voltage, wherein compensation circuit includes a circuit path coupled between the feedback node and a second supply node, and wherein the circuit path is configured to be opened and closed to modify the feedback voltage.