Patent Number: 6,297,624

Title: Semiconductor device having an internal voltage generating circuit

Abstract: An internal power supply circuit produces an internal power supply voltage from an external power supply voltage. A voltage level control circuit controls a voltage level and a temperature characteristic of the internal power supply voltage generated by the internal power supply circuit. The internal power supply circuit produces the internal power supply voltage having a negative or zero temperature characteristic in a low temperature region and a positive temperature characteristic in a high temperature region. The voltage level control circuit includes a structure optimizing a capacitance value of a sense power supply line stabilizing capacitance for driving a sense amplifier circuit, a level converting circuit determining the lowest operable region of the external power supply voltage of the internal power supply circuit, or a structure forcedly operating the internal voltage down converter upon power-on. The internal power supply voltage at a desired level is stably produced with a small occupied area and a low current consumption.

Inventors: Mitsui; Katsuyoshi (Hyogo, JP), Furutani; Kiyohiro (Hyogo, JP), Kono; Takashi (Hyogo, JP)

Assignee: Mitsubishi Denki Kabushiki Kaisha

International Classification: G05F 1/46 (20060101); G05F 1/10 (20060101); G05F 003/16 ()

Expiration Date: 10/02/2018