Voltage regulator using a multi-power and gain-boosting technique and mobile devices including the same
First Claim
1. A voltage regulator, comprising:
- an error amplifier configured to receive a first voltage through a first node as an operating voltage, to amplify a difference between a reference voltage and a feedback voltage, and to output an amplified voltage;
a power transistor connected between a second node through which a second voltage is supplied and an output node; and
a switch circuit configured to select a level of a gate voltage supplied to a gate of the power transistor and a level of a body voltage supplied to a body of the power transistor in response to a first power sequence of the first voltage, a second power sequence of the second voltage, and an operation control signal.
1 Assignment
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Accused Products
Abstract
A voltage regulator includes an error amplifier configured to receive a first voltage through a first node as an operating voltage, to amplify a difference between a reference voltage and a feedback voltage, and to output an amplified voltage; a power transistor connected between a second node through which a second voltage is supplied and an output node of the voltage regulator; and a switch circuit configured to select a level of a gate voltage supplied to a gate of the power transistor and level of a body voltage supplied to a body of the power transistor in response to a first power sequence of the first voltage, a second power sequence of the second voltage, and an operation control signal.
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Citations
20 Claims
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1. A voltage regulator, comprising:
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an error amplifier configured to receive a first voltage through a first node as an operating voltage, to amplify a difference between a reference voltage and a feedback voltage, and to output an amplified voltage; a power transistor connected between a second node through which a second voltage is supplied and an output node; and a switch circuit configured to select a level of a gate voltage supplied to a gate of the power transistor and a level of a body voltage supplied to a body of the power transistor in response to a first power sequence of the first voltage, a second power sequence of the second voltage, and an operation control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A mobile device, comprising:
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a voltage regulator; and a power management integrated circuit configured to supply a first voltage to the voltage regulator through a first transmission line and to supply a second voltage to the voltage regulator through a second transmission line, wherein the voltage regulator comprises; an error amplifier configured to receive the first voltage through a first node connected to the first transmission line as an operating voltage, to amplify a difference between a reference voltage and a feedback voltage, and to output an amplified voltage; a power transistor connected between a second node connected to the second transmission line and an output node of the voltage regulator; and a switch circuit configured to select a level of a gate voltage supplied to a gate of the power transistor and a level of a body voltage supplied to a body of the power transistor in response to a first power sequence of the first voltage, a second power sequence of the second voltage, and an operation control signal. - View Dependent Claims (14, 15, 16, 17)
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18. A mobile device, comprising:
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a memory; a memory controller comprising a voltage regulator; and a power management integrated circuit configured to supply a first voltage and a second voltage to the voltage regulator and to supply a third voltage to the memory, wherein the voltage regulator comprises; an error amplifier configured to receive the first voltage through a first node as an operating voltage, to amplify a difference between a reference voltage and a feedback voltage, and to output an amplified voltage; a power transistor connected between a second node receiving the second voltage and an output node of the voltage regulator; and a switch circuit configured to select a level of a gate voltage supplied to a gate of the power transistor and a level of a body voltage supplied to a body of the power transistor in response to a first power sequence of the first voltage, a second power sequence of the second voltage, and an operation control signal, and the first voltage is higher than the second voltage. - View Dependent Claims (19, 20)
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Specification