The LT8609AEDDM#PBF is a Switching Voltage Regulator designed and manufactured by Analog Devices. It is a 42V, 2A/3A peak, synchronous buck regulator with 2.5A switching current capability. It features a wide voltage range of 4.5V to 40V input and 0.6V to 21V output voltage. It also includes adjustable-frequency operation from 200kHz to 2.2MHz, a wide operating temperature range of -40°C to +125°C, and a range of protection features such as cycle-by-cycle current limiting, thermal shutdown protection, and overvoltage protection. Its high efficiency of up to 95% makes it suitable for applications such as automotive, industrial, and communications systems.