Overcurrent protection circuit and voltage regulator incorporating same
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United States of America Patent
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Jun 28, 2011
Grant Date -
Jul 16, 2009
app pub date -
Jan 9, 2009
filing date -
Jan 11, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
An overcurrent protection circuit includes a current limiter and a status detector, and a voltage regulator includes an output transistor. The output transistor is configured to regulate a voltage input to an input terminal to output a given constant voltage from an output terminal, while passing a current from the input terminal to the output terminal according to a control signal applied thereto. The current limiter reduces the current passed through the output transistor when the passed current exceeds a given current limit. The status detector is configured to generate a status signal indicating operation of the current limiter. A constant voltage regulator incorporating the overcurrent protection circuit is also disclosed.
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