The LTC3621EDCB-25#PBF is an ultra-low quiescent current, synchronous step-down switching voltage regulator manufactured by Analog Devices. It provides adjustable output voltage between 0.6 and 17.5V and a maximum output current of 1A. The LTC3621EDCB-25#PBF is also designed with an ultralow quiescent current of only 3.5uA, providing improved efficiency. An integrated inductor, current limit, and thermal shutdown protection makes it suitable for a wide range of applications including power management applications, I/O and processor biases, and post regulators for linear regulators.