Patent ID: 9720428
Date: 2017-08-01
CPC Classifications: G05F

Claim:
1. A voltage regulator, comprising: a differential amplifier configured to amplify a difference between a reference voltage and a feedback voltage, to thereby output the amplified difference; an output transistor having a gate connected to an output terminal of the differential amplifier; a phase compensation capacitor connected between the gate and a drain of the output transistor; a first switch connected between the gate of the output transistor and the phase compensation capacitor; a voltage follower having an input terminal connected to the output terminal of the differential amplifier; a second switch connected between an output terminal of the voltage follower and the phase compensation capacitor, wherein the voltage follower has the output terminal connected to the second switch such that the phase compensation capacitor is precharged to have the same potential as the output voltage of the differential amplifier; and a comparator configured to compare the reference voltage and the feedback voltage, the comparator coupled to both the first switch and the second switch, the first switch and the second switch being controlled with an output signal of the comparator.