The LTC3388EDD-3#PBF from Analog Devices is a high efficiency, step-down switching regulator with a 20V/50mA output, and a quiescent current of less than 1uA. It features high input voltage range of 2.9V to 24V, low output noise of 24mV (typical) at light loads, and excellent line and load regulation. It also includes a high efficiency synchronous rectifier, programmable soft-start, and a precision voltage reference. Additionally, the device is protected against short circuits, over-temperature, and over-current or over-power conditions. It is available in a Pb-free 4-pin DFN package.