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Switching regulator with hysteretic mode control using zero-ESR output capacitors

  • US 20070114983A1
  • Filed: 11/21/2005
  • Published: 05/24/2007
  • Est. Priority Date: 11/21/2005
  • Status: Abandoned Application
First Claim
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1. A switching regulator integrated circuit for controlling a first switch and a second switch in a hysteretic mode to drive a switch output node for generating a switching output voltage, the switch output node to be coupled to an LC filter circuit to generate a regulated output voltage having a substantially constant magnitude, the switching regulator integrated circuit comprising:

  • an integrated circuit package housing a switching regulator semiconductor chip comprising control circuitry formed thereon;

    a first package lead on the integrated circuit package receiving the regulated output voltage;

    a second package lead on the integrated circuit package to be coupled to a capacitor of the LC filter, the capacitor having zero or very low equivalent series resistance (ESR);

    a first bond wire connecting the first package lead to a first bond pad on the switching regulator semiconductor chip; and

    a second bond wire connecting the second package lead to one of the first package lead, the first bond pad, or a second bond pad electrically shorted to the first bond pad, wherein the capacitor is coupled to the second package lead to be electrically coupled to the regulated output voltage and the second bond wire provides series resistance to the capacitor.

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