| 摘要 |
An overcurrent protection circuit for a voltage regulator constituted by a depletion mode output transistor includes a foldback overcurrent protection circuit 9, an output voltage detection resistor 5, a first logic generating circuit 6 which receives an overcurrent detection signal 11 from the foldback overcurrent protection circuit 8 as its input, a second logic generating circuit 7 which receives a detection signal 13 from the output voltage detection resistor 5 representing decrease of the output voltage as its input, a negative voltage generating circuit 9, and an AND circuit 10.
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