Patent ID: 6351179
Filing Date: 2002-02-26
Classification: G05F

Abstract:
A semiconductor integrated circuit comprising:a stand-by mode down converter configured to receive an external power supply voltage and generate an internal power supply voltage, which is output to an internal power supply line in a stand-by mode; an active mode down converter configured to generate an internal power supply voltage, which is output to the internal power supply line in an active mode; a voltage switching circuit for switching a set value of the internal power supply voltage between the internal power supply voltage in the stand-by mode and the internal power supply voltage in the active mode; an enable signal generating circuit configured to enable the active mode down converter; and a stabilization capacitor which stabilizes the internal power supply voltage, the stabilization capacitor being connected to the internal power supply line; wherein an output terminal of the enable signal generating circuit is connected to the active mode down converter and the voltage switching circuit, and wherein the internal power supply voltage in the stand-by mode is set higher than the internal power supply voltage in the active mode.