Gate charge and switching — sizing the driver
Total gate charge is 66 nC at 10 V. For a 100 kHz hard-switched converter the average gate drive current works out to about 6.6 mA, but the peak current from the driver needs to deliver that charge in the target rise time — a 1 A gate driver charges the input capacitance of 5260 pF through the Miller plateau in under 100 ns. The ±20 V maximum gate rating leaves margin for ringing on long PCB traces.
The PG-TO262-3 package (TO-262AA with long leads) is a through-hole part — the tab is the drain, and the two source pins share the return current. The through-hole mount handles higher mechanical stress than a surface-mount D²PAK in high-vibration applications.