LOW DROPOUT VOLTAGE REGULATOR WITH LOW QUIESCENT CURRENT
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United States of America Patent
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Issued Date -
Nov 18, 2010
app pub date -
May 14, 2010
filing date -
May 15, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The disclosure relates to a low dropout voltage regulator comprising a regulation transistor to supply an output voltage from an input voltage, a gate control stage to supply a gate voltage to the regulation transistor, and an error amplifier to supply a control voltage to a control terminal of a control transistor. The low dropout voltage regulator also comprises a quiescent current control circuit to limit a quiescent current flowing through the gate control stage when the input voltage approaches the output voltage and causes the regulation transistor to enter into an ohmic conduction mode. The quiescent current control circuit comprises a current source providing a reference current and is configured to control the quiescent current by current-mirror effect based upon the reference current.
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