Low-drop voltage regulator

Details Low-drop voltage regulator Low-drop voltage regulator

1992-02-26

1994-01-18

Sterrett, Jeffrey

Electricity: power supply or regulation systems

Output level responsive

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

323274, 323280, 323281, 307 48, 307 66, G05F 159

Patent

active

052802337

ABSTRACT:
A voltage regulator comprising a first power switch connected between the input terminal and output terminal; a storage condenser connected to the input terminal via a one-way switch; a second power switch connected between the condenser and the input terminal; and a regulating element connected to the output terminal and driving the power switches in such a manner as to maintain the output voltage constant. For better distributing electric and thermal stress and improving the reliability and working life of the regulator by reducing the interference caused by switching of the two power switches, a drive device is provided between the regulating element and the switches for detecting the input voltage and the voltage of the condenser, and keeping both switches on as long as the input voltage is above two given thresholds, turning off the second switch when the input voltage is higher than the condenser voltage and below the first threshold, and turning off the first switch when the input voltage is lower than the condenser voltage and below the second threshold.

REFERENCES:
patent: 4543522 (1985-09-01), Moreau
patent: 4779037 (1988-10-01), LoCascio
patent: 5025203 (1991-06-01), Edwards

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