Linear regulator and semiconductor integrated circuit
AssigneeRohm Co., Ltd.
InventorsMakoto Yasusaka, Kotaro Iwata
Life of this patent
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Abstract
Disclosed is a linear regulator for generating an output voltage from an input voltage with reference to a ground potential, the linear regulator including a semiconductor integrated circuit, and an external diode that is externally connected to the semiconductor integrated circuit, in which the semiconductor integrated circuit includes an input terminal, an output terminal, an output transistor, a parallel diode, and a control circuit, and an anode of the external diode is connected to a ground, and a cathode of the external diode is connected to the output terminal.
Claims14
A linear regulator for generating an output voltage from an input voltage with reference to a ground potential, the linear regulator comprising:
- a semiconductor integrated circuit;
- and
- an external diode that is externally connected to the semiconductor integrated circuit, wherein
- the semiconductor integrated circuit includes
- an input terminal to which the input voltage is applied,
- an output terminal to which the output voltage is applied,
- an output transistor that is disposed between the input terminal and the output terminal,
- a parallel diode that is formed in parallel to the output transistor, and has a forward direction from the output terminal to the input terminal, and
- a control circuit that controls the output transistor in accordance with a feedback voltage based on the output voltage, and
- an anode of the external diode is connected to a ground having the ground potential, and
- a cathode of the external diode is connected to the output terminal.
A semiconductor integrated circuit included in a linear regulator for generating an output voltage from an input voltage with reference to a ground potential, the semiconductor integrated circuit comprising:
- an input terminal to which the input voltage is applied;
- an output terminal to which the output voltage is applied and a cathode of an external diode disposed outside the semiconductor integrated circuit is to be connected;
- an output transistor that is disposed between the input terminal and the output terminal;
- a parallel diode that is formed in parallel to the output transistor, and has a forward direction from the output terminal to the input terminal;
- and
- a control circuit that controls the output transistor in accordance with a feedback voltage based on the output voltage, wherein an anode of the external diode is connected to a ground having the ground potential.
Dependencies are inferred from the claim text.