The BD8967FVM from ROHM Semiconductor is a Synchronous Buck DC-DC Converter that converts an input voltage of 4.5-5.5 V to an output voltage of 3.3 V. It has an output current of up to 0.8 A and a switching frequency of 1 MHz. This synchronous buck converter is integrated with a FET that offers high switching efficiency. It provides a fast transient response to sudden load changes by implementing current mode control. This step-down converter has a soft-start, thermal shutdown, and UVLO functions and incorporates short-circuit protection with a time delay function. It is available in a surface-mount package that measures 2.9 x 4 x 0.9 mm and is ideal for applications such as power supply for LSI including DSP, microcomputer, and ASIC.