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Dual Voltage Regulator

IP.com Disclosure Number: IPCOM000058440D
Original Publication Date: 1988-Oct-01
Included in the Prior Art Database: 2005-Feb-15

Publishing Venue

IBM

Related People

Authors:
Carceller, S Rogoyski, J [+details]

Abstract

A dual output regulator circuit has been proposed with current limiting and under voltage shutdown features. It may be used to address overcurrent failure on programmable read-only memory cards installed in distributed sensor subsystems. Its output current is limited to a maximum value, and as the output voltage falls below a reference value, the output is switched off by a voltage sensing transistor. The output voltage and shutdown reference voltage are dynamically controlled between two different values, respectively. Previous circuitry dissipates maximum power in a current limiting situation which implies selecting output transistors and heat sinking techniques to satisfy failure operation [*]. The proposed circuitry (see the figure) avoids the problem by shutting down in a failing situation.