Samsung Electronics Co., Ltd.

Hyun-Wook Yoo

Dong-Jin Keum

Sung-Woo Moon

Yus Ko

Hwa-yeal Yu

Pyung-Woo Yeon

Myeong-Lyong Ko

Yu-Seok Ko

A switching regulator includes a DC-DC converter and a dynamic voltage positioning circuit. The DC-DC converter includes an inductor connected between an input port and an output port. The dynamic voltage positioning circuit includes a sensing circuit and a mirroring circuit. The sensing circuit is configured to sense an inductor current flowing through the inductor, and to convert a voltage applied to a direct current resistance (DCR) of the inductor into a droop current using a variable resistor. The mirroring circuit is configured to cause a voltage drop at the output port of the DC-DC converter based on a current corresponding to a difference between a bias current and the droop current.

Switching regulators, power management devices and systems including the same

A bi-directional voltage positioning circuit includes a voltage to current converter, a current mirror circuit and a switch. The voltage to current converter converts a sensing voltage to a first current, and the sensing voltage is sensed based on a current flowing through an output coil connected between a switching node and an output node. The current mirror circuit mirrors the first current to generate a second current and a third current, the second current is N times greater than the first current, the third current is M times greater than the first current, and N and M are real numbers greater than zero. The switch provides a feedback node with one of the second current and third current in response to a switching control signal, and an output voltage of the output node is divided at the feedback node.

Bi-directional voltage positioning circuit, voltage converter and power supply device including the same

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Busan, South Korea

Hyun-Wook Yoo