The EN5311QI is a highly integrated synchronous buck DC-DC converter from Altera Corporation. It is designed to provide high efficiency power conversion for FPGA, ASIC, and other digital designs. The EN5311QI features an input voltage range of 4.5V to 17V, making it suitable for a wide range of applications. It is capable of delivering up to 17A of output current with a configurable output voltage ranging from 0.5V to 5.5V. The converter operates at a high switching frequency of up to 4MHz, allowing for high power density and low output voltage ripple. It also includes a number of protection features such as overcurrent protection, overvoltage protection, and thermal shutdown. The EN5311QI is available in a compact, thermally enhanced 40-pin QFN package, making it easy to integrate into a variety of designs
