Patent ID: 6885235

Claim:
A semiconductor integrated circuit device comprising: a load circuit effecting an operation in response to a control signal activated; an internal power supply node connected to said load circuit; an external power supply node supplying an external power supply potential; an internal power supply generation circuit converting said external power supply potential to an internal power supply potential for supply to said internal power supply node; and an overcharge prevention circuit preventing said internal power supply node from being overcharged; wherein said internal power supply generation circuit includes: a first differential amplification circuit amplifying a potential difference between said internal power supply potential input to a first differential input node and a reference potential input to a second differential input node, for output to an output node; a current supply circuit supplying said internal power supply node with a current depending on a potential of said output node; and a compulsory current supply circuit passing a current from said external power supply node to said input power supply node regardless of said potential difference.