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Holdup capacitor energy harvesting

  • US 9,443,601 B2
  • Filed: 09/08/2014
  • Issued: 09/13/2016
  • Est. Priority Date: 09/08/2014
  • Status: Active Grant
First Claim
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1. A circuit to protect data in a storage device, the circuit comprising:

  • an energy storage device;

    a boost regulator for boosting an input voltage;

    a load switch for selectively coupling a power source to the input of the boost regulator, wherein the load switch is configured to de-couple the power source from the input of the boost regulator in response to receiving a power fail signal;

    a selector for selectively coupling the energy storage device to either an input or an output of the boost regulator;

    wherein the selector is configured to couple the energy storage device to the output of the boost regulator during normal operation of the storage device; and

    wherein the selector is further configured to couple the energy storage device to the input of the boost regulator in response to receiving a first signal; and

    a plurality of regulators coupled to the output of the boost regulator for supplying power to a first portion of the storage device.

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