Low dropout regulators
AssigneeLx Semicon Co., Ltd.
InventorsSung Dae Yeo, Tae Jun Ahn
Life of this patent
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Abstract
A low dropout regulator can comprise a driver configured to receive a first input voltage and generates an output voltage, an error amplifier configured to receive a second input voltage having a magnitude different from the first input voltage and output an amplifier output voltage based on the difference between a feedback voltage corresponding to the output voltage and a reference voltage, and a driving controller configured to control the output voltage of the driver based on the amplifier output voltage.
Claims17
A low dropout regulator, comprising:
- a driver configured to receive a first input voltage and generate an output voltage;
- an error amplifier configured to receive a second input voltage having a magnitude different from the first input voltage and output an amplifier output voltage based on a difference between a feedback voltage corresponding to the output voltage and a reference voltage;
- and
- a driving controller configured to control the output voltage of the driver based on the amplifier output voltage,
- wherein the driver comprises a driving transistor,
- wherein a signal corresponding to the amplifier output voltage is configured to be input to a gate terminal of the driving transistor, and
- wherein the driving controller comprises:
- a switching circuit connected between an output line of the error amplifier and the gate terminal of the driving transistor;
- a first PMOS transistor comprising one terminal connected to a supply line that is configured to supply the first input voltage;
- and
- a second PMOS transistor comprising one terminal connected to another terminal of the first PMOS transistor and another terminal connected between the switching circuit and the gate terminal of the driving transistor.
A low dropout regulator, comprising:
- a driver configured to receive a first input voltage and generate an output voltage;
- an error amplifier configured to receive a second input voltage having a magnitude different from the first input voltage and output an amplifier output voltage based on a difference between a feedback voltage corresponding to the output voltage and a reference voltage;
- and
- a driving controller configured to control the output voltage of the driver based on the amplifier output voltage,
- wherein the driving controller comprises:
- a switching circuit connected between an output line of the error amplifier and a gate terminal of a driving transistor;
- a first PMOS transistor comprising one terminal connected to a supply line that is configured to supply the first input voltage;
- and
- a second PMOS transistor comprising one terminal connected to another terminal of the first PMOS transistor and another terminal connected between the switching circuit and the gate terminal of the driving transistor.
A low dropout regulator, comprising:
- a driver configured to receive a first input voltage and generate an output voltage;
- an error amplifier configured to receive a second input voltage having a magnitude different from the first input voltage and output an amplifier output voltage based on a difference between a feedback voltage corresponding to the output voltage and a reference voltage;
- a first PMOS transistor comprising one terminal connected to a supply line that is configured to supply the first input voltage;
- and
- a second PMOS transistor comprising one terminal connected to another terminal of the first PMOS transistor and another terminal connected to a gate terminal of a driving transistor included in the driver.
Dependencies are inferred from the claim text.