A 300mA BGR-Recursive Low-Dropout Regulator Achieving 102-to-80dB PSR at Frequencies from 100Hz to 0.1MHz with Current Efficiency of 99.98%

Abstract

This paper presents a low-dropout (LDO) regulators that can supply up to 0.3A output current with high power supply rejection (PSR). The proposed BGR-recursive LDO design with PSR-boosting feedforward improves the PSR while consuming a low quiescent current of $\le 50 \mu \mathrm {A}$. Among the state-of-the-art LDOs, the proposed chip fabricated in $0.5 \mu \mathrm {m}$ CMOS achieves the highest PSR of 102-to-80dB in the frequency range from 100Hz to 0.1MHz with a current efficiency of 99.98% and shows the best FoM of 11ps in the transient response performance.