The LTC3873ETS8TRM#PBF is a high-frequency, high-current synchronous step-down switching regulator controller manufactured by Analog Devices. It is designed to provide fast transient response, high efficiency and low output ripple. It features integrated circuit protection against current and thermal overloads, as well as detection of output short-circuits and overvoltages. It is designed for 6V to 38V input voltage and up to 8A peak current output. It is pin compatible with the LTC3863, making it suitable for upgrading existing applications. The device features a maximum switching frequency of 1.2MHz, 3.3V to 5.5V adjustable output voltage range, programmable Soft-Start, frequency foldback and selectable current or voltage mode control. It is housed in an 8-pinlead-free, Pb-free Thermally Enhanced TSSOP package.