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US 12,748,445 B2Granted
Voltage regulator
AssigneeKioxia Corporation
InventorMasayuki Usuda
Life of this patent
Estimating the term…
Abstract
A voltage regulator includes an operational amplifier that compares a feedback voltage that is proportional to an output voltage and a predetermined reference voltage that corresponds to a desired output voltage. The operational amplifier controls the conduction state of an output transistor according to the comparison. A detecting circuit monitors the operating state of the operational amplifier, and in the case that the operational amplifier is not operating, outputs a signal which causes the output transistor to be placed in a non-conductive state.
Claims20
A semiconductor device comprising:
- a first circuit;
- and
- a voltage regulator electrically connected to the first circuit and including:
- a first terminal;
- a second terminal;
- a third terminal;
- a first wiring connected to the first terminal;
- a second wiring connected to the second terminal;
- a second circuit electrically connected to the first and second wirings, including a first transistor, and configured to operate on a basis of a first voltage and a second voltage both provided to the second circuit, the first voltage being proportional to a third voltage on the third terminal;
- a second transistor electrically connected to the first wiring and the third terminal;
- and
- a third circuit including a third transistor electrically connected to the first wiring, the third circuit being configured to control the second transistor to turn on or turn off on a basis of current flowing through the third transistor, the current flowing through the third transistor corresponding to current flowing through the first transistor, the current flowing through the first transistor varying on a basis of a difference between the first and second voltages.
9 more elements
Dependencies are inferred from the claim text.