Patent ID: 8710815

Claim:
A voltage regulator, comprising: a power stage including at least one power transistor operating to convert an input voltage to an output voltage; a feedback control loop feedback controlling the operation of the power transistor according to the output voltage or a feedback signal related to the output voltage; and a compensation signal generator receiving a dynamic voltage identification (DVID) signal, and when the DVID signal requests the output voltage to change to a target voltage, the compensation signal generator generating a compensation signal to shorten an interval for the output voltage to reach the target voltage, wherein the feedback control loop includes: an error amplifier generating an error amplification signal according to (a) the output voltage or the feedback signal related to the output voltage and (b) a voltage signal determined by the DVID signal; and a pulse width modulation (PWM) comparator generating an output signal according to the error amplification signal and a ramp signal so as to directly or indirectly control the power transistor the power stage; wherein the compensation signal is inputted to the feedback control loop in one of the following manners: (1) the compensation signal being added to the error amplification signal as an input to an input terminal of the PWM comparator; or (2) the compensation signal being added to the ramp signal as an input to another input terminal of the PWM comparator.