Patent ID: 6906502

Claim:
A method for regulating an output voltage applied to a load at an output terminal of a power converter, the power converter including an output capacitor coupled between the output terminal and a ground reference, an inductor that is selectably coupled by a switch between a power supply and the ground reference, the method comprising: storing a power event and a corresponding open loop response in a memory device; sensing the output voltage and a current in the inductor during a plurality of time intervals; for each time interval: storing the sensed output voltage and the sensed current in the memory device; and comparing if the sensed output voltages and the sensed currents of one or more previous time intervals stored in the memory device matches the stored power event; wherein, when a match is not found, a close loop response is provided, comprising: calculating a next current based on the sensed output voltage and the sensed current in the immediate cycle; and varying a duty cycle of the switch to modify the current in the inductor during the immediately following time interval, according to the calculated next current, the duty cycle being the portion of the second time interval during which the switch couples the inductor to the power supply, when a match is not found; and wherein, when a match is found: retrieving from the memory device and applying the corresponding open loop response.