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FOLDBACK SHUTDOWN FOR VOLTAGE REGULATORS

IP.com Disclosure Number: IPCOM000008146D
Original Publication Date: 1997-Jun-01
Included in the Prior Art Database: 2002-May-22

Publishing Venue

Motorola

Related People

Authors:
Petr Kadanka Antonin Rozsypal

Abstract

The circuit described below and illustrated in the accompanying schematic (Figure 1) provides very effective foldback shutdown protection against accidental short circuits on the output of a voltage regulator or other circuit. It is described for the example of a voltage regulator. Foldback shutdown means that a short circuit on the output causes the output current to drop to a level below the satura- tion level of the regulator, i.e., it automatically turns itself off.