653 / 2019-04-03 10:25:05

A Low-Quiescent Current Off-Chip Capacitor-less LDO Regulator with UGCC Compensation

CL-LDO, UGCC, low-quiescent-current, high stability, large current load

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A low quiescent current off-chip capacitor-less
low-dropout regulator (CL-LDO) for system on a chip
applications is proposed in this study. An error amplifier with
embedded unity gain compensation cell (UGCC) circuit is
designed to improve both circuit stability and load transient
performance. The proposed CL-LDO with a total quiescent
current of 1.9 µA and a power supply range from 1.2 to 1.8 V
achieves a stable 1 V output. The maximum overshoot voltage
is less than 53.1 mV when a maximum current load is 100 mA.
The proposed CL-LDO is fabricated in a 0.18 µm standard
CMOS process. It occupies an active area of 0.094 mm2.