A FVF LDO Regulator With Dual-Summed Miller Frequency Compensation for Wide Load Capacitance Range Applications

This paper presents a proposed Flipped Voltage Follower (FVF) based output capacitorless low-dropout (OCL-LDO) regulator using Dual-Summed Miller Frequency Compensation (DSMFC) technique. Validated by UMC 65-nm CMOS process, the simulation results have shown that the proposed LDO regulator can be stabilized by a total compensation capacitance
$({\rm C}_{\rm C})$
of 8 pF for a load capacitance
$({\rm C}_{\rm L})$
ranging from 10 pF to 10 nF. It consumes 23.7
$\mu$
A quiescent current with a 1.2 V supply voltage. With a dropout voltage of 200 mV, the LDO regulator can support a maximum 50 mA load current. It can settle in less than 1.7
$\mu$
s with a 1% accuracy for the whole
${\rm C}_{\rm L}$
range. The proposed LDO regulator is comparable to other reported works in terms of figure-of-merit (FOM). Most significantly, it can drive the widest range of
${\rm C}_{\rm L}$
and achieve the highest
${\rm C}_{\rm L(max)}/{\rm C}_{\rm C}$
ratio with respect to the counterparts.