Hi,
We are using the LTM8078, and I've noticed that our schematics are wrong concerning the bias pin.
We have the bias pin connected to our 1V8 rail, when the datasheet specifies that it needs to be connected to a voltage above 3V2. It has been working completely fine across 15 prototype PCBs and so i'm under the assumption that the voltage is too low to trigger the internal logic which tells the IC to use the bias pin voltage.
What I have noticed in the datasheet is there is no example, or description of how to NOT use this pin. I would assume it is okay to be left floating if unused but the datasheet doesn't specify that in the pin description, and all of the examples either tie it to a rail above 3V3 or to an external supply.
I would like to correct our design but first I would like confirmation that the pin can be left floating.
Thanks,
Luke
