Serial control type voltage regulator

Details Serial control type voltage regulator Serial control type voltage regulator

1996-03-15

1998-10-27

Nguyen, Matthew V.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323282, G05F 156

Patent

active

058282068

ABSTRACT:
The disclosed serial control type voltage regulator can prevent current from flowing from a backup capacitor (C1) to the side of the voltage regulator, when the control transistor (Q1) stops operating, reducing the power consumption of the backup voltage supply. In the serial control type voltage regulator having a control transistor (Q1) connected in series between an input terminal (1) and where an output terminal (2), an output voltage detector (6) and an error amplifier (4) are used for comparing an output voltage detected by the output voltage detector with a reference voltage (E3) to control the control transistor, there are provided a first switching element (Q3) for cutting off the output voltage detector (4) when the control transistor (Q1) stops operating and a second switching element (Q4) for cutting off the error amplifier (4) also when the control transistor (Q1) stops operating. When the error amplifier is constructed by field effect transistors, the second switching element can be eliminated since the input impedance of the field effect transistor is high.

REFERENCES:
patent: 5309082 (1994-05-01), Payne
patent: 5563500 (1996-10-01), Muterspaugh
patent: 5563501 (1996-10-01), Chan

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