I have implemented TPL5111 in my design. sadly dont have meter that can messure below 1uA.
Added some DIP swithes so you can choose what time interval you need.
Here is some lates pcb 
Still wating for it to arrive, but similar design is in field up un running for almost 2 months.
https://snapshot.raintank.io/dashboard/snapshot/QTzAqP8YY8M6YfSVmzZrmyd44AS576XJ?orgId=2
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