ISL81806 80V Dual Synchronous Buck Controller Renesas Electronics ISL81806 80V Dual Synchronous Buck Controller is E-mode GaN-based and generates two independent outputs or one output with two interleaved phases. The ISL81806 provides a 5.3V gate driver voltage for E-mode GaN device applications. With broad input and output voltage ranges (up to 80V), the controller is suitable for telecommunications, data centers, and computing applications.