Hey there all, I’ve got a battery voltage (nominal 3V, 2330 coin cell, < 10uA current draw) that I need to route from a battery holder to an RTC. As I routed it, I remembered back to my intern days where I had preset 3 different via and track widths and sizes with the appropriate annular rings. A search of the great Googs didn’t give me much in the way of useful info. If I was going to create a trio of presets (so I can quickly switch between them if I don’t have a Net Class assigned), are there any standard via and track sizes you all like to use for power traces, especially when it comes to routing power over distance?
Is the right answer to do some calculation here? I know that a 30 mil trace will get the job done (with plenty of margin lol), but I’m not sure about via sizing for that. I thought perhaps like a 24mil via hole and then I blanked on the method for determining and calculating annular ring size. I know the minimum is .15mm but that doesn’t tell me the recommended calculation.