/diy/ - Do It Yourself

so my friend was reviewing my MPP tracker circuit and told me I would have to use a mosfet driver because of the switching frequencies involved and the 5 volt logic level of the microcontroller I'm using being unable to drive the mosfets at said frequency

but other than that, we're both too inexperienced to know what to do after that.
Do all of these mosfets need to be driven by a mosfet driver? Or, do only the ones directly connected to the PWM output need to be driven by a driver?