Patent ID: 8471538
Filing Date: 2013-06-25
Classification: G05F

Abstract:
1. A voltage regulation circuit, comprising: a power transistor connected between an input supply voltage and an output supply node; an error amplifier having a first input connected to receive a reference voltage and a second input connected to a feedback node, the error amplifier providing an output derived from the inputs; a buffer circuit connected between the input supply voltage and ground, the buffer circuit connected to receive the output of the error amplifier and having an output derived therefrom connected to control the gate of the power transistor; a voltage divider circuit connected between the output supply node and ground, the feedback node taken from a node of the voltage divider; a first diode, connected between the input supply voltage and the output of the buffer circuit; and a current sinking circuit connected between the output supply node and ground, wherein the amount of current being sunk is a decreasing function of the current being supplied at the output supply node.