Fully On-Chip LDO Regulator With Robust Frequency Compensation Scheme

Abstract

A Fully On-Chip low-dropout regulator with Mixing Q-Reduction and Source Follower (MQRSF) circuit to minimize the required on-chip compensation capacitance and enhance the whole system’s transient response simultaneously, is introduced in this paper. The idea has been modeled and experimentally verified in 1µm CMOS process. The required on-chip capacitance is reduced to 2 pF, compared with 6pF for the technology of Q-Reduction. According to experimental results, the presented low-dropout regulator can operate at 100mA maximum output current with 200mv of dropout voltage.