Voltage regulator with bypass for multi-voltage storage system
First Claim
1. A memory system including a control path to a host device, the host device supplying a host voltage having a level suitable for operation of the memory system and a power up complete signal indicating that the host voltage has reached the level, comprising:
- a voltage regulator including a host voltage input, an output and a bypass shorting the host voltage at the input to the output;
a controller;
a voltage detector communicating with the regulator and the controller;
a bypass enable signal output by the controller subsequent to the power up complete signal being generated by the host device indicating that the host voltage has reached the level.
3 Assignments
0 Petitions
Accused Products
Abstract
A system and method for supplying power to a peripheral device where the voltage supplied by a host device may be the voltage required for operation of the peripheral, or a higher voltage. A memory system includes a voltage regulator including an input, and output and a bypass shorting the input to the output. A voltage detector communicates with the regulator. A Bypass enable signal operable responsive to a signal generated by the host device indicating that the power up of the host is complete is coupled to the bypass element. A method for operating a voltage regulator in a memory system includes the steps of: providing a voltage regulator having an input and an output, and including a bypass shorting the input to the output; setting the bypass to off prior to power up of a host device; responsive to a power up completion signal from a host device, determining the power supplied by the host; and if the power supplied by the host is below a threshold operating voltage, enabling the bypass.
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Citations
36 Claims
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1. A memory system including a control path to a host device, the host device supplying a host voltage having a level suitable for operation of the memory system and a power up complete signal indicating that the host voltage has reached the level, comprising:
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a voltage regulator including a host voltage input, an output and a bypass shorting the host voltage at the input to the output; a controller; a voltage detector communicating with the regulator and the controller; a bypass enable signal output by the controller subsequent to the power up complete signal being generated by the host device indicating that the host voltage has reached the level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for operating a voltage regulator in a memory system including a controller, comprising:
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providing a voltage regulator having a host voltage input and an output, and including a regulator bypass responsive to the controller shorting the host voltage at the input to the output responsive to an enable signal; setting the bypass to off prior to power up of a host device; responsive to a power up completion signal from a host device to the controller, the power up completion signal indicating that the host voltage is at a level suitable for operation of the memory system, determining the power supplied by the host; and if the power is below a threshold operating voltage, enabling the bypass using the controller. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. A peripheral device for a host system supplying a host voltage, the peripheral device including a voltage regulator circuit and a controller, comprising:
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a voltage regulator having a host voltage input and an output; a bypass element coupled to selectively short the host voltage at the input to the output; a bypass control signal output from the controller coupled to the bypass element and responsive to a host system power up completed signal indicating that the host voltage is at a level suitable for operation of the memory system and which enables the bypass element when the host voltage is below a threshold level subsequent to host power-up completion. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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32. A method for operating a voltage regulator in a multimedia card memory device, comprising:
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providing a voltage regulator having a host voltage input and an output, a controller, and including a regulator bypass shorting a host voltage at the input to the output; setting the bypass to off prior to power up of a host device; responsive to a command signal from the host device indicating that the host voltage is at a level suitable for operation of the memory system, determining the power supplied by the host; and if the power is below a threshold operating voltage subsequent to the command signal, enabling the bypass using the controller. - View Dependent Claims (33)
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34. A memory system, comprising:
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a controller; a memory array; and a voltage regulator having a shorting element between a host voltage input and an output, the shorting element being responsive to a bypass control signal, the bypass control signal provided by the controller responsive to a host system power up complete signal indicating that the host voltage is at a level suitable for operation of the memory system which enables the shorting element when the host supply voltage provided by the host is below a threshold level subsequent to power-up completion. - View Dependent Claims (35, 36)
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Specification