Patent ID: 8710813
Filing Date: 2014-04-29
Classification: G05F

Abstract:
1. A low drop-out regulator comprising: an unregulated DC input terminal, for receiving an input voltage; a regulated DC output terminal; an output pass element, for supplying a power to said regulated DC output terminal, a source of said output pass element coupled to said unregulated DC input terminal, a drain of said output pass element connected to said regulated DC output terminal; a mirror pass element, for generating a mirror signal, a source and a gate of said mirror pass element being respectively coupled to said source and a gate of said output pass element, a drain of said mirror pass element generating said mirror signal correlated to an output current of said output pass element; a first amplifier, having an output terminal coupled to control said gate of said output pass element, a first input terminal of said first amplifier having a first reference signal, a second input terminal of said first amplifier coupled to said regulated DC output terminal; and a second amplifier, having an output terminal coupled to program said first reference signal, a first input terminal of said second amplifier having a second reference signal, a second input terminal of said second amplifier coupled to receive said minor signal.