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US 2019/0171240 A1Published application
Voltage regulator
AssigneeToshiba Memory Corporation
InventorMasayuki USUDA
Life of this patent
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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.
Claims15
A voltage regulator, comprising:
- a first terminal at which a first voltage can be applied;
- a second terminal at which a second voltage can be applied, the second voltage being lower than the first voltage;
- a third terminal from which a third voltage can be output, the third voltage corresponding to the first voltage;
- a first circuit electrically connected to the first and second terminals and including a first transistor;
- a second transistor electrically connected between the first and third terminals;
- and
- a second circuit including a third transistor and configured to switch a state of the second transistor between a conductive state and a non-conductive state in accordance with current flowing through the third transistor, the current flowing through the third transistor corresponding to current flowing through the first transistor of the first circuit.
4 more elements
Dependencies are inferred from the claim text.