A Robust Low-Voltage On-Chip LDO Voltage Regulator in 180 nm

Figure 9

(a) Load regulation (zoomed) of LDO for a variation of load current from 0 mA to 50 mA for TT process corner

(b) Line regulation (zoomed) of LDO for a variation supply voltage from 1.4 V to 1.8 V for TT process corner

(c) Transient response of LDO for a variation of load current from 0 mA to 50 mA for TT process corner. Maximum overshoot is 1293−1.2=93mV, while maximum undershoot is 1.2−1.114=86mV

(d) Settling time demonstration of the proposed LDO for variation of load current from 0 mA to 50 mA at 1 microsecond rise and fall times