POWER SUPPLY CIRCUIT AND SEMICONDUCTOR DEVICE
First Claim
1. A power supply circuit, comprising:
- a first transistor coupled between an input terminal where an input voltage is input and an output terminal where an output voltage is output;
an error amplifier configured to generate a first error signal and a second error signal based on a difference voltage between a voltage in accordance with the output voltage and a reference voltage, and to output the first error signal to a gate terminal of the first transistor;
a control circuit configured to add a control signal based on a first current in accordance with an AC component of the output voltage to the first error signal; and
an adjustment circuit configured to decrease the first current based on the second error signal when the output voltage is higher than a certain voltage.
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Accused Products
Abstract
An output transistor coupled between an input terminal where an input voltage is input and an output terminal where an output voltage is output; an error amplifier configured to generate a first error signal and a second error signal based on a voltage in accordance with the output voltage and a reference voltage, and to output the first error signal to a gate terminal of the output transistor; an anti-overshoot circuit coupled to the output terminal and controlled by the second error signal; an output transistor control part configured to add a control signal based on a first current in accordance with an AC component of the output voltage to the first error signal; and a sensitivity adjustment part configured to decrease the first current based on the second error signal when the output voltage is higher than a certain voltage.
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Citations
9 Claims
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1. A power supply circuit, comprising:
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a first transistor coupled between an input terminal where an input voltage is input and an output terminal where an output voltage is output; an error amplifier configured to generate a first error signal and a second error signal based on a difference voltage between a voltage in accordance with the output voltage and a reference voltage, and to output the first error signal to a gate terminal of the first transistor; a control circuit configured to add a control signal based on a first current in accordance with an AC component of the output voltage to the first error signal; and an adjustment circuit configured to decrease the first current based on the second error signal when the output voltage is higher than a certain voltage. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A semiconductor device, comprising:
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a load; and a power supply circuit configured to supply electric power to the load, wherein the power supply circuit including; a first transistor coupled between an input terminal where an input voltage is input and an output terminal where an output voltage is output; an error amplifier configured to generate a first error signal and a second error signal based on a difference voltage between a voltage in accordance with the output voltage and a reference voltage, and to output the first error signal to a gate terminal of the first transistor; a control circuit configured to add a control signal based on a first current in accordance with an AC component of the output voltage to the first error signal; and an adjustment circuit configured to decrease the first current based on the second error signal when the output voltage is higher than a certain voltage. - View Dependent Claims (8, 9)
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Specification