Importance

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Abstract

The present disclosure discloses a low dropout regulator apparatus having noise-suppression mechanism. An operational amplifier circuit includes a differential input circuit, an amplifying output circuit and a first and a second resistive components. The differential input circuit is coupled between first connection nodes and a ground terminal to receive a reference voltage and a feedback voltage. The amplifying output circuit includes a first and a second transistor pair circuits. The first transistor pair circuit is coupled between a power supply and second connection nodes. The second transistor pair is coupled between the second connection nodes and the ground terminal and has an amplifying output terminal generating an amplified voltage. The first and the second resistive components are coupled between the first and the second connection nodes. A voltage stabilizing output circuit receives the amplified voltage to generate an output voltage and generates the feedback voltage according to a division thereof.

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First Claim