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DC-DC CONVERTER AND MANUFACTURING METHOD THEREOF

  • US 20120140523A1
  • Filed: 11/30/2011
  • Published: 06/07/2012
  • Est. Priority Date: 12/03/2010
  • Status: Active Grant
First Claim
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1. A DC-DC converter comprising:

  • an input terminal to which input voltage is applied;

    a voltage converter circuit that is connected to the input terminal and includes a first transistor;

    a control circuit that is configured to control the voltage converter circuit and includes a second transistor including a silicon material in a channel formation region; and

    a third transistor that is provided between the input terminal and the control circuit and configured to convert the input voltage into power supply voltage that is lower than the input voltage,wherein the first transistor and the third transistor are transistors including an oxide semiconductor material in channel formation regions, andwherein the first transistor and the third transistor are stacked over the second transistor with an insulating film provided between the first and third transistors and the second transistor.

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