LTC4015 High Current and Component Calculate

Hello,

I will design PCB  for 20A charge current. I have some questions.

1) There is no enough information about Inductor, Capacitor calculate in LTC4015 datasheet. Is there a other reference document?

2) M3A and M3B MOSFETs have 12A current capacity. I would like to connect parallel MOSFET for high current. Is it possible this condition?

In addition, Vsense voltage is very low (32 mV). For 20A charge current, resistance value is 16 mOhm. Low resistance, it is hard to find. Why 32 mV?

I am waiting for your answer. Thanks. Have a nice day.