Patent ID: 7852058

Claim:
A power supply integrated circuit comprising: a first module operable to control electrical power provided to a load, the electrical power characterized by a load voltage level; a second module operable to receive a power supply reference signal and a signal indicative of the load voltage level and output a power supply error signal, where the power supply error signal is based, at least in part, on the difference between the power supply reference signal and the signal indicative of the load voltage level; and a third module operable to receive the power supply error signal, digitally process the power supply error signal, and output a power supply control signal that is based, at least in part, on the digitally processed power supply error signal; where the first module is operable to receive the power supply control signal and control the load voltage level based, at least in part, on the power supply control signal; and where the third module comprises: a digital filter operable to output a first signal; and a sigma delta module, communicatively coupled to the digital filter, that receives the first signal and outputs a second signal representative of the first signal.