Pay attentions to the following requirements:

• The maximum V_ds voltage of the switch must be higher than the TPS613222A output voltage.
• If no R_sense, the R_ds,on should also be balanced with the total solution efficiency, 3% is good tradeoff under the maximum load for the whole system power consumption.
• The maximum V_gs specification should exceed the maximum output voltage of TPS613222A under the worst condition.
• The parasitic capacitance is also problem for Q2. When a short circuit accident happens, the high slew rate di/dt introduces high spike at the drain-source of Q2. The maximum spike should not exceed the maximum V limitation.