The RT9161-50GX is a synchronous buck regulator from Richtek Technology Corporation. It is a high power density, high efficient, wide input voltage range DC/DC regulator, which supports up to 250W output power with a wide input voltage of 4.5V to 36V. It has an adjustable output voltage of 0.6V-5V which is provided through an external resistor. The device also has an internal 0.5A synchronous P-Channel MOSFET, linear current monitoring, and over-temperature protection. The device also features low operating quiescent currents and low operating temperature, making it an ideal choice for high power applications.