Patent ID: 6114843
Filing Date: 2000-09-05
Classification: G05F

Abstract:
A voltage regulator circuit for converting an external supply voltage from an external voltage source to an internal supply voltage, the voltage regulator circuit comprising:a reference voltage generator for converting the external supply voltage to a stable reference voltage;a tuning circuit for converting the stable reference voltage to the internal supply voltage; andan output driver circuit for stabilizing the internal supply voltage, wherein the output driver circuit comprises:a first op-amp having an inverting input terminal connected to an output terminal of the tuning circuit;a first resistive element connected between a non-inverting input terminal of the first op-amp and a first voltage source; anda plurality of PMOS power transistors, the drain terminal of each of the plurality of PMOS power transistors being coupled to receive the external supply voltage, the source terminal of each of the plurality of PMOS power transistors being connected to the non-inverting input terminal of the first op-amp, and the gate terminal of each of the plurality of PMOS power transistors being connected to an output terminal of the first op-amp.