Patent ID: 6259612
Filing Date: 2001-07-10
Classification: G11C,H02M

Abstract:
A semiconductor device comprising:an internal voltage generator for generating an internal voltage that is obtained by up-converting or down-converting an external power supply voltage;a first resistor-voltage divider, having a plurality of first resistors, to output a first divided voltage that is obtained by dividing said internal voltage according to a resistance ratio of said first resistors;a capacitor-voltage divider, having a plurality of capacitors connected in series between an output terminal of said internal voltage generator and a ground level, to output a second divided voltage from a node of said capacitors; anda comparator to compare a reference voltage and said first divided voltage for controlling said internal voltage generator according to a result of comparison, said comparator judging whether to halt operation of said internal voltage generator or not based on the result of comparison between said reference voltage and first divided voltage while said internal voltage generator is operating, on the other hand, controlling said internal voltage generator based on the result of comparison between said reference voltage and second divided voltage while said internal voltage generator is not operating, and controlling said first resistor-voltage divider so that a current flows therethrough only while said internal voltage generator is operating.