Voltage regulator
AssigneeAblic Inc.
InventorKaoru Sakaguchi
Life of this patent
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Abstract
A voltage regulator includes an error amplifier which receives a feedback voltage and a reference voltage, an amplifier circuit which receives an output voltage of the error amplifier and controls a gate of an output transistor by a first output voltage, and a non-regulation detection circuit which detects a non-regulation state of the voltage regulator based on a second output voltage of the amplifier circuit. The amplifier circuit includes a first transistor receiving the output voltage of the error amplifier at a gate of the first transistor, and a second transistor connected to a drain of the first transistor, and provides the second output voltage based on a gate-source voltage of the second transistor.
Claims10
A voltage regulator, comprising:
- a feedback circuit configured to provide a feedback voltage based on an output voltage provided from an output transistor;
- an error amplifier configured to receive the feedback voltage and a reference voltage;
- an amplifier circuit configured to receive an output voltage from the error amplifier, amplify the output voltage from the error amplifier to generate a first output voltage, and control a gate of the output transistor with the first output voltage;
- and a non-regulation detection circuit configured to detect a non-regulation state of the voltage regulator based on a second output voltage provided from the amplifier circuit, the amplifier circuit comprising a first transistor receiving the output voltage of the error amplifier at a gate of the first transistor, and a second transistor connected to a drain of the first transistor, and providing the second output voltage based on a gate-source voltage of the second transistor, wherein the first output voltage is the voltage at a drain of the second transistor, wherein the amplifier circuit comprises a reference voltage circuit configured to supply a voltage to a gate of the second transistor.
Dependencies are inferred from the claim text.