Semiconductor Integrated Circuit and Method for Operating the Same

摘要

A semiconductor integrated circuit that is used for a stabilizing power supply circuit which supplies an output power supply voltage to a parallel connection of a smoothing capacitor and a load, from an input power supply voltage, includes an error amplifier that detects an error of the output power supply voltage, an output control circuit that is connected between the input terminal and the output terminal, a phase compensation circuit that is connected to the error amplifier, and a detection control circuit that is connected to the phase compensation circuit.

主权项

1. A semiconductor integrated circuit that is used for a stabilizing power supply circuit which supplies an output power supply voltage to a parallel connection of a smoothing capacitor and a load which are connected to an output terminal from an input power supply voltage which is supplied to an input terminal, comprising:
an error amplifier that detects an error of the output power supply voltage; an output control circuit that is connected between the input terminal and the output terminal; a phase compensation circuit that is connected to the error amplifier; and a detection control circuit that is connected to the phase compensation circuit, wherein the output control circuit is controlled by the error amplifier responding to the error of the output power supply voltage, thereby generating the output power supply voltage, and the detection control circuit detects temperature variation of an equivalent series resistance of the smoothing capacitor and resistance variation due to the temperature variation, and variably controls the phase compensation circuit according to the detected result.