Developed for high-voltage applications where isolation and reliability is required, the UCC21520 delivers reinforced isolation of 5.7 kV_RMS along with a common mode transient immunity (CMTI) greater than 100 V/ns, and it has the industry’s best-in-class propagation delay of 19 ns and the best channel-to-channel delay matching of less than 5 ns which enables high switching frequency, high-power density and efficiency. In this application report, design considerations and benefits of the UCC21520’s fast dynamic response are introduced with discussion of its wide application in a great variety of power electronics topologies.