Integrated circuit driver having stable bootstrap power supply

  • US 6,897,643 B2
  • Filed: 10/11/2002
  • Issued: 05/24/2005
  • Est. Priority Date: 10/11/2002
  • Status: Active Grant
First Claim
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1. An integrated circuit driver comprising:

  • a high side transistor;

    a low side transistor connected in series to said high side transistor such that the source of said high side transistor is connected to the drain of said low side transistor, the source of the high side transistor and the drain of the low side transistor forming an output node;

    a bootstrap contact pad connected to the output node;

    a bootstrap capacitor having a first terminal connected to said bootstrap contact pad, wherein the bootstrap capacitor couples to the gate and the source of the high side transistor;

    a high side gate drive for selectively controlling the high side transistor, said high side gate drive having as an input a signal from a second terminal of said bootstrap capacitor;

    a low side gate drive for selectively controlling the low side transistor; and

    an output contact pad connected to the output node, said output contact pad providing an output signal to a load.

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