Patent ID: 7565559

Claim:
A point-of-load regulator comprising: a power conversion circuit for converting an intermediate voltage to an output voltage, said power conversion circuit comprising at least one power switch for conveying power to a load and a digital controller for controlling operation of said at least one power switch responsive to a feedback measurement, said digital controller further comprising: a digital filter having a transfer function defined by plural filter coefficients; an analog-to-digital converter providing a digital error signal representing a difference between said output measurement and a reference value, said digital filter providing a digital control output based on a sum of current and previous error signals and previous control outputs; an error controller for modifying operation of said digital filter upon an error condition; and a digital pulse width modulator providing a control signal to said at least one power switch, said control signal having a pulse width corresponding to said digital control output; a serial data bus interface for communicating programming information from an external serial data bus connected thereto; and a controller connected to said serial data bus interface and said power conversion circuit, said controller being used to determine said plural filter coefficients from programming data received via said serial data bus interface.