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Data storage device employing cascaded voltage regulators during power failure

  • US 8,767,354 B1
  • Filed: 12/08/2011
  • Issued: 07/01/2014
  • Est. Priority Date: 12/08/2011
  • Status: Active Grant
First Claim
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1. A data storage device comprising:

  • a non-volatile memory; and

    control circuitry comprising an interface operable to receive a supply voltage, anda capacitor, wherein the control circuitry is operable to;

    use an operating voltage regulator to convert the supply voltage into an operating voltage used to operate the non-volatile memory;

    use the supply voltage to charge the capacitor to a capacitor voltage higher than the supply voltage; and

    during a power failure;

    use a backup voltage regulator to convert the capacitor voltage into a backup voltage substantially equal to the supply voltage; and

    use the operating voltage regulator to convert the backup voltage into the operating voltage used to operate the non-volatile memory.

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