A SERIES VOLTAGE REGULATOR INTEGRATED IN CMOS TECHNOLOGY

Abstract

Since the regulation of voltage supply is one of the most critical requirement of the electronic system design, the monolithic voltage regulator has become one of the most important building block of both analog and digital systems. This importance has been recently increased with the emergent low voltage technologies, encouraging industrials and researchers to work on new regulator structures. The voltage regulator presented here, has been first calculated and simulated through PSpice. The paper deals with the conception of a series voltage regulator integrated in 0.6µm CMOS technology. This type of regulators has become one of the most important building block of both analog and digital systems. It is constituted by a bandgap voltage reference and an error amplifier associated with a ballast element. The circuit obtained is unconditionally stable with good performances: a power-supply-rejection-ratio < 2%, an output resistance < 0.3 W and a temperature coefficient < 10 ppm. It is integrated on an ASIC for on board applications where low volume and low power consumption are key elements.