부산대학교 도서관

This paper presents a fully integrated low-power 0.18 μm CMOS Low-Dropout (LDO) voltage regulator for battery-operated portable devices. A single stage high-gain folded cascode-compensated amplifier is used to attain good static performances, while thanks to a very simple dynamic bias circuit, transient performances are significantly enhanced. Results validate a 1.2 V output voltage from a 3.3 V to 1.3 V battery input voltage, delivering a load current of 50 mA over a 50 pF load. The quiescent current is only 5.9 μA, including an all-MOS 0.4 V reference voltage. Settling times are lower than 5.4 μs at full load transient.