Patent ID: 8570013
Filing Date: 2013-10-29
Classification: G05F

Abstract:
1. A power regulator comprising: an error amplifier, powered by an output voltage, that receives a reference signal and a feedback signal indicative of said output voltage, and that provides a control current according to a difference between said reference signal and said feedback signal; a start-up circuit, powered by an input voltage, that provides a start-up current; and a pass device, coupled to said error amplifier and said start-up circuit, that receives said input voltage, provides said output voltage at an output terminal of said power regulator, generates an output current flowing through said output terminal according to said start-up current during a start-up duration of said power regulator, and generates said output current through said output terminal according to said control current during normal operation of said power regulator subsequent to said start-up duration, wherein during said normal operation, said output current increases if said control current increases, and said output current decreases if said control current decreases, wherein said pass device comprises a current mirror that mirrors said start-up current to said output current at a first predetermined ratio during said start-up duration, and wherein said first predetermined ratio is determined by a first mirroring ratio of said current mirror.