The LTC3855IUJ#TRPBF is an adjustable synchronous step-down switching regulator controller from Analog Devices. It is designed to operate with either two N-channel power MOSFETs, in a non-synchronous buck configuration, or four MOSFETs, in a synchronous buck configuration. The LTC3855 features adjustable constant frequency current mode control, allowing operation over a wide input voltage range of up to 38V, guarantees precise accuracy of ±1.5% over the entire operating temperature range of -40°C to +125°C, and provides programmable soft-start, under-voltage lockout, and adjustable peak current limit protection. Its high-efficiency, low-noise, and dynamic response are further enhanced by optional programmable dynamic response control.