Patent ID: 8843180

Claim:
A switching voltage regulator, comprising: a series switch element; a shunt switch element; a switching controller configured to generate a switching voltage through controlled closing and opening of the series switch element and the shunt switch element; a switched output filter for filtering the switching voltage and generating a regulated output voltage, wherein the switched output filter comprises a plurality of capacitors that are selectively included within the switched output filter; and a controllable current source connectable in series with a capacitor of the plurality of capacitors of the switched output filter; and wherein the switching controller is operative to: disconnect the capacitor of the plurality of capacitors of the switched output filter when the regulated output voltage is to be changed from the first value to the second value; change the regulated output voltage from the first value to the second value; controllably connect the controllable current source in series with the capacitor, wherein substantially all of a current provided by the controllable current source flows through the capacitor to charge the capacitor after the regulated output voltage has changed to the second value; and reconnect the capacitor to the switched output filter.