Shutdown current of LoRa-E5 mini, from 72uA to 3uA by replacing LDO and Diode

Products & Technology LoRa
4

TTL 74 series, CMOS 4000 series, uA709, uA741, i8085, MC6800,…
My faverit was 6800 rather than 8085.
As a child, I lived in a vacuum tube world.