Transient current and voltage protection of a voltage regulator
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United States of America Patent
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Jun 12, 2001
Grant Date -
N/A
app pub date -
Sep 6, 2000
filing date -
Sep 6, 2000
priority date (Note) -
Expired
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Abstract
During transient operation of a voltage regulator, the gate of p-channel MOS pass transistor may be pulled down during the transient period to cause excessive surge current. The surge current is limited by using the pass transistor as a current mirror during the transient period. After the transient period, the pass transistor resumes its role as an element together with a differential amplifier and a reference voltage in a feedback loop to regulate the output voltage.
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