This work presents a comparative study between basic Flipped Voltage Follower (FVF), Cascoded FVF (CAFVF) and Buffered FVF (BFVF) Low Dropout Regulators (LDO) along with simulation results in tsmcN40 PDK.The designs support a load current of 5u-10mA with a on-chip capacitive load of 100fF, for a dropout of 700 mV (From 1.8V to 1.1V). This work also employs both miller conmpensation and non-dominant pole cancellation techniques in BFVF to get better phase margin and PSRR. Line regulation of 3.3 mV/V and load regulation of 20.4 uV/mA was obtained for 10mA load current, with less than 0.5 uS response time in BFVF.
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Chinmay Hegde (2024) studied this question.
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