Patent ID: 6828763
Filing Date: 2004-12-07
Classification: G05F

Abstract:
A voltage regulator comprising:a reference voltage circuit connected between a power supply and a ground; a voltage dividing circuit for dividing an output voltage supplied to an external load, which is composed of a bleeder resistor; a differential amplifier for comparing an output of the reference voltage circuit with an output of the voltage dividing circuit and outputting a first signal; a phase compensating circuit in which a resistor and a capacitor are connected in series; a MOS transistor in which an output of the differential amplifier is inputted to a gate electrode, which is connected between the power supply and the phase compensating circuit, and in which a source is grounded; a constant current circuit connected between the MOS transistor and the ground; and an output transistor in which a second signal output from a connection point between the MOS transistor and the phase compensating circuit is inputted to a gate electrode, and which is connected between the power supply and the voltage dividing circuit, wherein the output voltage is outputted from a connection point between the output transistor and the voltage dividing circuit.