TPS2121: Recommended switch IC for FPGA power supply and BATTERY switching.

Tool/software:

Hi

FPGA will consume battery (general mercury battery), but it will switch with +3.3V_ALW after powering on. However, the following lines will cause the battery to consume too much current, and there will be a drop if you use MOS to switch it. So is there any way at the moment so that when the +3.3V_ALW is out of power, the battery will not draw too much current, and the drop will not be too deep at the moment of switching? PS: Battery cannot exceed 10uA when Power off.

Recommended switch IC for FPGA power supply and BATTERY switching.