Very low leakage enhancement mode mosfets
The ADG601/602 analogue switch has very low leakage: -

And the leakage is lower on a lower supply voltage such as 3.3 volts and 0 volts.
It also has a 2.5 Ω on resistance if that helps?
The supply rail is: -
Dual ±2.7 V to ±5.5 V or single +2.7 V to +5.5 V supplies

So, just regard it as a load switch.