Therefore,
extremely rapid hard switching is preferable to soft switching
converters. This paper proposes a new layout technique for low
parasitic inductance paths using commercially standard PCB
specifications for very fast switching speeds of GaN power devices
in flip-chip packages resulting in a highly efficient (>94%) hard
switching 12-1 V synchronous buck converter. The proposed
technique is experimentally verified at output loads from 4 -
20 A and achieves less than 5 ns switching times.