On-chip low-voltage capacitor-less low dropout regulator capable of modulating the Q factor

摘要

A system and method for a capacitor less low dropout (LDO) voltage regulator, and an error amplifier is configured to amplify the difference between the reference voltage and the regulated LDO voltage. The Miller amplifier is coupled to the output of the error amplifier without including an external capacitor in the LDO voltage regulator, and the Miller amplifier is configured to amplify the miller capacitance formed at its input node. The capacitor coupled to the output of the error amplifier reduces the Q value (q) and thereby generates a positive feedback loop to improve the stability of the system.