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VOLTAGE REGULATOR

  • US 20120194947A1
  • Filed: 01/23/2012
  • Published: 08/02/2012
  • Est. Priority Date: 01/28/2011
  • Status: Abandoned Application
First Claim
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1. A voltage regulator, comprising:

  • an error amplifier circuit for amplifying and outputting a difference between a reference voltage and a divided voltage obtained by dividing a voltage output by an output transistor, to thereby control a gate of the output transistor; and

    an overcurrent protection circuit for monitoring an output current of the output transistor to protect the voltage regulator from an overcurrent,wherein the overcurrent protection circuit comprises;

    a sense resistor provided to a drain of the output transistor, for sensing the output current;

    an offset comparator including an input terminal provided with an offset voltage, for comparing voltages at both terminals of the sense resistor; and

    a first transistor including a gate connected to an output terminal of the offset comparator, and a drain connected to the gate of the output transistor.

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