1. A voltage controller comprising: a compensator including a lookup table for determining a digital control signal based on a digital error signal; a modulator operative to provide a power control signal in response to said determined digital control signal; and a delay line analog to digital converter operative to compare a converter voltage to a reference voltage and generate said digital error signal indicative of a difference between said compared voltages; wherein said compensator, said modulator, and said delay line of said controller include no passive electronic components.