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Semiconductor integrated circuit with a regulator circuit provided between an input terminal and an output terminal thereof

  • US 10,108,209 B2
  • Filed: 09/09/2015
  • Issued: 10/23/2018
  • Est. Priority Date: 02/13/2015
  • Status: Active Grant
First Claim
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1. A semiconductor integrated circuit comprising:

  • an output transistor connected between a first node on an input terminal side and a second node on an output terminal side;

    an error amplifier that has a non-inverting input terminal, an inverting input terminal, and an output terminal, the non-inverting input terminal being connected to a third node between the second node and a standard potential, the inverting input terminal being connected to a reference voltage, the output terminal being connected to a gate of the output transistor; and

    a control circuit that makes responsiveness of the error amplifier at startup slower than responsiveness of the error amplifier at steady operation,wherein the control circuit compares the voltage on the output terminal and a threshold and controls the responsiveness of the error amplifier according to a comparison result, andwherein if the voltage on the output terminal is less than or equal to the threshold, the control circuit controls the responsiveness of the error amplifier to be at first responsiveness and, if the voltage on the output terminal exceeds the threshold, controls the responsiveness of the error amplifier to be at second responsiveness faster than the first responsiveness.

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