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DC-DC converter, semiconductor device and display device

  • US 8,816,662 B2
  • Filed: 05/17/2011
  • Issued: 08/26/2014
  • Est. Priority Date: 05/21/2010
  • Status: Active Grant
First Claim
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1. A semiconductor device comprising a DC-DC converter circuit, the DC-DC converter circuit comprising:

  • a wiring;

    a conversion circuit comprising;

    an inductor; and

    a transistor comprising a drain terminal and a source terminal, one of which is connected to the inductor;

    a hysteresis comparator comprising a first input terminal for a first reference potential, a second input terminal for a second reference potential, and a third input terminal electrically connected to an output terminal of the conversion circuit; and

    a logic circuit comprising a first input terminal electrically connected to an output terminal of the hysteresis comparator, a second input terminal electrically connected to the wiring, and an output terminal electrically connected to a gate of the transistor.

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