Voltage regulator providing quick response to load change
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United States of America Patent
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Apr 11, 2023
Grant Date -
Sep 8, 2022
app pub date -
Mar 4, 2021
filing date -
Mar 4, 2021
priority date (Note) -
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Abstract
A voltage regulator includes an operational amplifier, a first transistor, a second transistor, a capacitor and a current sink circuit. The operational amplifier outputs a control voltage according to an amplified differential voltage between a first input terminal and a second input terminal of the operational amplifier. The first transistor includes a control terminal receiving the control voltage, a first terminal coupled to a supply terminal, a second terminal providing an output voltage, and a bulk terminal. The second transistor includes a second terminal coupled to the bulk terminal of the first transistor, and a bulk terminal coupled to the supply terminal. The capacitor includes a first terminal coupled to the bulk terminal of the first transistor, and a second terminal receiving the output voltage. The current sink circuit generates a feedback voltage according to the output voltage and output the feedback voltage to the operational amplifier.
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