Patent ID: 9223329
Filing Date: 2015-12-29
Classification: G05F

Abstract:
1. A low drop out voltage regulator comprising: an operational transconductance amplifier configured to be supplied with a supply voltage of the regulator, receive as inputs a reference voltage and a feedback voltage, and generate an intermediate current based upon a difference between the reference voltage and the feedback voltage; a current-to-voltage amplification stage configured to be supplied with a boosted voltage greater than the supply voltage from a high voltage line, receive as an input the intermediate current, and generate a driving voltage that is changed by an amount based upon a value and a sign of the intermediate current; a pass transistor comprising first and second conduction terminals, with the first conduction terminal configured to receive the supply voltage, and with said pass transistor configured to be controlled with the driving voltage to keep constant on the second conduction terminal a regulated output voltage of the regulator; and a feedback network coupled to the second conduction terminal and configured to generate the feedback voltage based on the regulated output voltage of the regulator; an overall gain of a loop of the low drop out voltage regulator being based on a gain of the operational transconductance amplifier multiplied by a gain of the current-to-voltage amplification stage.