An output-capacitor-less low-dropout regulator with transient-improved technique

A transient-improved output-capacitor-less low-dropout (LDO) regulator based on single Miller capacitor feedforward compensation (SMFFC) is presented in this paper. With the SMFFC, the slew-rate at the gate of power transistor is enhanced, which results in an improved transient response during a fast load current transient. The die area of the LDO implemented in 130nm CMOS process is only 0.0113mm
²
. Experimental results show that the developed LDO is stable for C
_L
=0pF within 0-50mA full load range. Besides, the output voltage of LDO can recover within 190ns with less than 75mV voltage spike when the load current changes from 1mA to 50mA.