Memory system and method of controlling power therein
AssigneeKioxia Corporation
InventorHajime Matsumoto
Life of this patent
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Abstract
A memory system in an embodiment includes: a nonvolatile memory; a memory controller configured to control the memory; and a power supply circuit configured to supply a voltage of power of at least one of the memory and the memory controller, wherein the power supply circuit is configured to: store first information having a value of the voltage to be supplied; output an output voltage based on the value of the voltage specified by the stored first information; detect an output current at an output end of the output voltage; compare a value of the detected output current with a threshold value; and update the stored first information to second information based on a result of the comparison, the second information having an updated value of the voltage to be supplied.
Claims18
A power supply circuit comprising:
- a controller including a storage, and the controller being configured to:
- store first information specifying a value of a voltage;
- output an output voltage at an output node based on the value of the voltage specified by the stored first information;
- detect an output current at the output node;
- compare a value of the detected output current with a threshold value, wherein the threshold value includes a first threshold value indicating an upper limit and a second threshold value indicating a lower limit;
- update the stored first information to second information based on a result of the comparison, the second information specifying an updated value of the voltage;
- increase the value of the voltage when the value of the output current exceeds the first threshold value as a result of the comparison;
- and
- decrease the value of the voltage when the value of the output current is below the second threshold value as a result of the comparison.
A method of controlling power, comprising:
- outputting an output voltage at an output node based on a value of a voltage specified by first information stored in a storage;
- detecting an output current at the output node;
- comparing a value of the detected output current with a threshold value, wherein the threshold value includes a first threshold value indicating an upper limit and a second threshold value indicating a lower limit;
- updating the stored first information to second information based on a result of the comparison, the second information specifying an updated value of the voltage;
- determining the value of the output current exceeds the first threshold value as a result of the comparison;
- in response to the determining that the value of the output current exceeds the first threshold value as the result of the comparison, increasing the value of the voltage;
- determining the value of the output current is below the second threshold value as a result of the comparison;
- and
- in response determining that the value of the output current is below the second threshold value as the result of the comparison, decreasing the value of the voltage.
Dependencies are inferred from the claim text.