Switching pulse-width modulated voltage regulator and method of controlling a switching pulse-width modulated voltage regulator

摘要

A switching voltage regulator includes a comparison module configured to receive a reference voltage and a feedback voltage and to generate a comparison signal based on a difference between the reference voltage and the feedback voltage, and a control module configured to generate a gain control threshold signal based on at least one of the reference voltage and the feedback voltage. The control module may be configured to control a duration of a PWM pulse based on the at least one of the reference voltage and the feedback voltage. The feedback voltage may a regulated output voltage of the switching voltage regulator. The switching voltage regulator may be implemented in an analog or a digital manner.

主权项

1. A switching voltage regulator, comprising:
a comparison module configured to receive a reference voltage and a feedback voltage and to generate a comparison signal based on a difference between the reference voltage and the feedback voltage; at least one pulse-width modulated (PWM) power stage; and a control module configured to:
generate a gain control threshold signal based on at least one of the reference voltage and the feedback voltage; andcontrol a switching frequency of the at least one PWM power stage based at least in part on the comparison signal and on the gain control threshold signal, wherein a change in the switching frequency in response to a transient in a regulated output voltage is proportional to the comparison signal.