LTC3619BEMSE#TRPBF is a secondary side DC/DC controller with integrated FETs, integrating two 400V, N-channel MOSFETs in a Pb-free (RoHS compliant) 8-Lead MSOP surface-mount package. This device requires a single resistor to set the combined output current limit. It provides an adjustable, dual current-mode output voltage range from 0.6V to 12.75V with an external single resistor. It is designed to provide current sensed, high-efficiency, power conversion for medium-power applications. This part requires a wide input voltage range of 4.5V to 48V, making it suitable for use in automotive, industrial and other applications. In addition, LTC3619BEMSE#TRPBF includes a power-ok signal, an output voltage power-good signal, an output current regulation signal, an optional output voltage pass-through pin, an overtemperature warning signal (OTC) and an overcurrent fault reporting signal (OCF). This device also includes a maximum duty cycle lockout feature to maximize efficiency. Additionally, this part is suitable for automotive AEC-Q100 Grade 1 qualified applications.