I want to use LTC4418 fuctionality of detecting which one of power supplies is on at this moment. Here is my approach to it:
PS_VALID1 is connected directly to VALID1 of LTC4418 (without any additional components), same for PS_VALID2. BLE_GPIO is a GPIO of 3.3V powered microcontroller.
What I got confused by is the documentation stating:
VALID1, VALID2, CAS..............................–2mA/+5mA
VALID1 and VALID2 are open-drain outputs, fine, they pull-down to GND or are Hi-Z, but why there is a +5mA output current stated in the docs? Is this circuit correct then?