The RT9161-33GV is a single-channel synchronous buck switching regulator from Richtek. It is designed for applications such as note/tablet PCs, digital cameras, handheld devices, and GPS systems. It features a wide input voltage range of 2.4V to 6V, low operating current of 1mA, and a very low shutdown current of 0.1µA. It also has a programmable soft-start, current limit protection, and power OK signal. The RT9161-33GV is a low quiescent current regulator, allowing for longer battery life. It has high efficiency of up to 96%, making it suitable for power-sensitive applications. Additionally, the RT9161-33GV has excellent line and load regulation with high PSRR noise rejection.