Patent ID: 8786270

Claim:
A synthetic ripple regulator which converts an input voltage to a regulated output voltage and which includes frequency control based on a fixed frequency reference clock, said synthetic ripple regulator comprising: an error network providing an error signal indicative of relative error of the output voltage; a ripple detector which provides a ramp control signal based on the input and output voltages and a pulse control signal; a combiner which adjusts said ramp control signal based on a frequency compensation signal to provide an adjusted ramp control signal; a ripple generator which develops a ripple control signal based on said adjusted ramp control signal; a comparator network which develops said pulse control signal to control switching based on said error signal and said ripple control signal at a frequency that varies in response to load transients; and a phase comparator which compares said pulse control signal with the reference clock and which provides said frequency compensation signal indicative thereof to control steady-state operating frequency of the synthetic ripple regulator by adjusting said ramp control signal to adjust said frequency of said pulse control signal towards the fixed frequency of the reference clock.