Abstract

An output-capacitorless low-dropout regulator (OCL-LDO), which is based on flipped-voltage-follower (FVF) using damping-factor-control (DFC) frequency compensation for SOC application, is presented in this paper. The proposed LDO with 1.2V supply, 100mA load current was designed by SMIC 0.13um standard CMOS process. Simulation results have shown that the LDO can be stable for a load capacitance ranging from 0 to 80pF. The line regulation and load regulation are 3.3mV/V and 62uV/mA, respectively, and the quiescent current consumption is only 27uA. Under maximum load current changes, the overshoots and undershoots are less than 90mV and 140mV, and the recovery time is about 2.5us.

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