This letter suggests to the LDO regulator with the high reliability ESD protection circuit that achieves low peak voltage through analog switch structure. The proposed LDO regulator has the function of detecting the output voltage fluctuations depending on the load via an analog switch structure and effectively controlling the peak voltage. 

The capacitor-less low dropout voltage regulator applied to mobile devices increases the power consumption due to the continuously exposed peak voltage. The dynamic feedback loop for the LDO regulator proposed in this study can provide a function to stably control the peak voltage regardless of the change in the load current.