5 volt to 3.3 volt buffer
Hi,
the schem is OK but you can have a problem with a frequency, the MOSFET have a high capacitance between gate and source. On 2 Mhz this capacitance can be a problem for the output circuit on the controller, the result will be slide edge. If you use JFET the result will be better, because JFET have a lowest capacitance. And, something other, the more of the MOSFET is need around 5 V to saturation, if will use MOSFET first look for the saturation voltage.