Patent ID: 7821244

Claim:
A circuit for voltage regulation, comprising: a voltage regulator that is arranged to provide a regulated DC voltage at an output node, wherein the voltage regulator is arranged to provide the regulated DC voltage at a first value if voltage value signal corresponds to a first level, and to provide the regulated DC voltage at a second value if the voltage value signal corresponds to a second level, wherein the first value is greater than the second value; and an output capacitor circuit that is coupled to the output node, wherein the output capacitor circuit includes a first capacitor, a second capacitor, and a first switch circuit, and wherein the output capacitor circuit is arranged such that: if the voltage value signal corresponds to the first level the second capacitor provides at least a portion of the regulated DC voltage, else if the voltage value signal corresponds to the second level the first capacitor is coupled to the output voltage node, and at least one terminal of the second capacitor is left floating.