Patent ID: 8294441

Claim:
A voltage regulator circuit comprising: a first amplifier operative to receive a first reference voltage and a feedback voltage, said first amplifier being biased by a first biasing voltage; a second amplifier having a first input terminal receiving an output voltage of said first amplifier, and a second input terminal receiving a regulated output voltage of the circuit; said second amplifier being biased by the first biasing voltage; an N-type transistor having a first terminal responsive to an output of the second amplifier, a second terminal receiving an input voltage being regulated, and a third terminal supplying the regulated output voltage, wherein said feedback voltage is generating by dividing the regulated output voltage; a comparator responsive to the output of the first amplifier and to the regulated output voltage; and a controlled discharge circuit responsive to the output of the comparator and adapted to provide a discharge path from the third terminal of the first N-type transistor to ground.