Samsung Electronics Co., Ltd.

Deokgi Lee

Hyosang Youn

Minwoo Kim

Changseok Chae

Hyungju Park

Wookwan Lee

Hongjin Cheon

Youngkyun Park

An input buffer circuit includes a low voltage generator, a first hysteresis buffer and a first dual-supply level shifter. The low voltage generator is connected to a first power supply voltage having a first voltage level, generates a mirrored current based on the first power supply voltage and generates a second power supply voltage having a second voltage level smaller than the first voltage level. The second power supply voltage is independent from a variation of the first power supply voltage. The first hysteresis buffer operates based on the second power supply voltage and generates a first inverted reset signal having hysteresis based on an inverted reset signal. The first dual-supply level shifter operates based on the first and second power supply voltages and generates a second inverted reset signal by shifting the first inverted reset signal from the second voltage level to the first voltage level.

Input buffer circuit and power management integrated circuit including the same

A switching regulator generates an output voltage from an input voltage and includes; a charge sharing circuit that selectively forms one of a first charge sharing path between a first flying capacitor and a second bootstrap capacitor and a second charge sharing path between a second flying capacitor and a first bootstrap capacitor based on first and second conversion modes.

Switching regulator and operating method

Growing community of inventors

Seoul, South Korea

Deokgi Lee