A full on-chip low-dropout linear regulator with enhanced line, load regulation

A novel full on-chip (capacitor-less) low-dropout linear regulator is introduced in this paper. The main feature of the proposed LDO is its ability to be stable in the full-output-current range while still has good line and load regulations as well as improved transient response. This is achieved by using an advanced compensation network along with an adaptive-gain PMOS pass device. The post-layout simulations have revealed the advantageous performances of the LDO in all process corners. These include 3 uV/mA load regulation, 200 uV/V line regulation as well as 200 mV output voltage variation during load transient (the worst case). They are achieved in the condition of 0-100 mA output current capability, 200 mV dropout voltage and 54 uA no-load current consumption under a 2V supply.