A Fast Fully-Integrated LDO with Compact-Size and LOW-IQ for SoC Applications

Abstract

Fully integrated LDOs are analyzed in this paper. Focused on SoC applications, a 20-mA 1.2-V full-on-chip NMOS LDO with fast transient response is designed. Compact size and low quiescent current are obtained owning the proposed adaptive biasing circuits. With only 7$-\mu$A quiescent current, the response time to 100X positive load current step in 1-ns is only 60-ns.