A Fast Settling On-Chip Low-Dropout Regulator with a Robust Frequency Compensation Scheme

An on-chip low-dropout (LDO) voltage regulator with a novel technique to improve the settling time and a robust frequency compensation scheme is presented in this paper. Thetotal capacitance required for the utilized compensation topology is only 2.8 pF. The proposed LDO regulator was implemented in astandard 0.35 μm CMOS technology and the simulation results show that the implemented LDO regulator operates from a supply voltage of 2 V to 4 V with a dropout voltage of 200 mV and themaximum load current of 120 mA, consuming 45 μA quiescent (ground) current.

Keywords:

Low-dropout regulators , voltage regulators , onchip regulators , fast settling , frequency compensation