A 0.087 fs FOM Current-mirror-based Analog-assisted Digital LDO with Vo Ripple Optimization

초록

This paper proposes a current-mirror based analog-assisted (CBAA) digital low-dropout regulator (DLDO) that achieves a fast transient response and output voltage (V<inf>O</inf>) ripple optimization. It features less than 1 mVV<inf>O</inf> ripple at 200 mA load current (I<inf>L</inf>) and 106 mV undershoot in load transition. Fabricated using 28 nm CMOS process, the CBAA DLDO shows a superior figure-of-merit (FOM) of 0.087 fs among low input voltage (V<inf>IN</inf>) DLDOs. © 2025 JSAP.