Patent ID: 8258859

Claim:
A voltage reducing circuit comprising: an internal power supply section configured to reduce an external power supply voltage supplied from an external power supply to an internal power supply voltage which is lower than said external power supply voltage based on a reference voltage; a first current control section configured to control a current flowing through said internal power supply section when said internal power supply voltage is lower than a setting voltage; and a second current control section configured to control the current flowing through said internal power supply section when said internal power supply voltage exceeds the setting voltage; wherein said internal power supply section comprises: a differential circuit section configured to output an output voltage based on said reference voltage; and a voltage supplying section configured to generate said internal power supply voltage from said external power supply voltage based on said output voltage, wherein said first current control section controls the current flowing through said differential circuit section when said internal power supply voltage is lower than said setting voltage, and stops the control of the current flowing through said differential circuit section when said internal power supply voltage exceeds said setting voltage, and wherein said second current control section uses said internal power supply voltage as a power supply voltage, and controls the current flowing through said differential circuit section when said internal power supply voltage exceeds said setting voltage.