Patent ID: 8018214
Filing Date: 2011-09-13
Classification: G05F,Y10S

Abstract:
1. A regulator with soft-start using a current source, the regulator comprising: a power switch unit including first and second power switches connected in series between a power supply terminal and an output terminal; a load capacitor connected between the output terminal and a ground, and charging a voltage by a current through the power switch unit; a voltage detection unit detecting a voltage of the output terminal; a comparison unit comparing a detection voltage of the voltage detection unit and a predetermined reference voltage, and outputting first and second switching signals having different phases according to a result of the comparison; a current source unit connected to the power terminal, and generating a predetermined constant current; a current control unit switching a connection between a control terminal of the first power switch and the current source unit according to the first switching signal of the comparison unit, and switching a connection between the control terminal of the first power switch and the ground according to the second switching signal of the comparison unit; and an error amplification unit amplifying an error voltage between the detection voltage of the voltage detection unit and the predetermined reference voltage.