Hi,
When I hear "mosfet driver", then I think about IR21110 or something similar.
That means an IC that "drives" the gate of a MOSFET for the MOSFET to ON/OFF.
But here is no such driver.
For sure one can say the N-Ch is the driver for the P-Ch Mosfet.
But why use the N-Ch at all? just drive the P-Ch Mosfet directly from the 5V_SW signal. (inverted)
What the P-Ch Mosfet does is called "High side power switch".
There are dedicated "High side power switches" ... the benefit is that they include some protection features like "overcurrent protection". Just do a search .. and a bit of datasheet reading.
And as Barry mentioned: The SI2301 will do it.
With it´s 120mOhms ON resistance it generates a 250mV voltage drop and 0.5W of heat. It surely gets pretty hot.
I´d rather choose one with less R_DS_ON.
Klaus