Patent ID: 7952337

Claim:
A switching voltage regulator circuit adapted to supply N regulated output voltages, the voltage regulator circuit comprising: a digital control block operative to receive a first reference voltage and selectively receive one of N feedback voltages, said digital control block adapted to generate a first intermediate voltage signal operative to cause the difference between a selected one of N feedback voltages and the reference voltage to be less than a predefined value, said digital control block comprising: an analog-to-digital converter; a digital control engine responsive to said analog-to-digital converter and adapted to cause the difference between the feedback voltage signal and the first reference voltage to be less than a predefined value; and a digital-to-analog converter responsive to said digital control block; N voltage regulation channels, each voltage regulation channel comprising: a latch; first and second associated switches responsive to an output of the latch; said first and second switches disposed between first and second supply voltages and having a common node; an associated sensing circuit responsive to a current flow through the associated first or second switches; an associated amplifier responsive to a reference voltage signal and an associated voltage feedback signal to generate an associated second intermediate voltage signal; a comparator adapted to receive the output of the associated sensing circuit and further to receive a threshold value defined by the first intermediate voltage signal and the associated second intermediate voltage signal to change a state of the latch in response.