Low Power On-Chip Load Tracking-Zero Compensation Method For Low Dropout Regulator

This paper describes a novel frequency compensation method for a low dropout regulator (LDO). The proposed load tracking-zero compensation circuit not only eliminates the need for a bulky external off-chip capacitor that is typically employed in conventional compensation techniques, but also consumes very low additional quiescent current of 7.5 mu A that makes this method highly suitable for integrated SoC power management applications. It is demonstrated that this compensation technique, designed for the LDO in 130-nm CMOS technology, improves the stability and enhances the load regulation of the low dropout regulator.