Patent ID: 9529374
Filing Date: 2016-12-27
CPC Classification: G05F

Claim Text:
1. A low drop-out voltage regulator for providing a regulated voltage, the low drop-out voltage regulator comprises a supply voltage terminal for receiving a supply voltage; a regulated voltage terminal for providing the regulated voltage; a regulated voltage driver for providing the regulated voltage to the regulated voltage terminal in response to a control voltage; a feedback-loop circuit for generating the control voltage on basis of a feedback voltage such that the regulated voltage driver provides the regulated voltage wherein, in the feedback-loop circuit, a first feedback voltage is generated which relates to the value of the regulated voltage on basis of a first ratio between the first feedback voltage and the regulated voltage; a pull-up circuit for pulling the regulated voltage up to the supply voltage when a difference between the supply voltage and the control voltage is smaller than a predefined voltage difference, wherein the pull-up circuit is configured to provide a pull-up signal to the feedback-loop circuit when the regulated voltage is pulled up to the supply voltage, and the feedback-loop circuit is configured to generate a second feedback voltage instead of the first feedback voltage when it receives the pull-up signal the second feedback voltage is generated on basis of a second ratio between the second feedback voltage and the regulated voltage, the second ratio is different from the first ratio and the second ratio is for preventing oscillations in the low drop-out voltage regulator.