A new resonant gate drive circuit for synchronous buck converter

The paper proposed a resonant gate drive circuit for buck converter with synchronous rectifier. The circuit can recover more than 50% of the conventional gate drive loss. It charges and discharges the gate of MOSFET at constant current. It can also reduce the switching loss significantly. Other advantages of the proposed circuit include better noise immunity for dv/dt turn on, less sensitive to track inductance. The experimental prototype shows that the loss reduction is 10% of the output power at 1MHz