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Methods and apparatus for DC-DC converter having independent outputs

  • US 7,851,940 B2
  • Filed: 10/31/2006
  • Issued: 12/14/2010
  • Est. Priority Date: 11/01/2005
  • Status: Active Grant
First Claim
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1. A DC-DC converter circuit, comprising:

  • a boost circuit to boost an input voltage;

    a first output for coupling to a first load and a second output for coupling to a second load, the first and second outputs being coupled to and driven by the boost circuit, wherein the first and second outputs are independently enabled;

    a boost loop control module directly coupled to the boost circuit to control voltage supplied to the first and second outputs based upon which of the first or second output requires a higher boost voltage;

    a first feedback path for a first feedback signal from the first output and a second feedback path for a second feedback signal from the second output;

    a switch matrix to provide the first and second feedback paths; and

    a minimum select circuit to receive the first and second feedback signals for determining which of the first and second outputs requires a higher output voltage.

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