Brown-out risk at an input
▲ warningvoltage/under-input
What it looks like
VIN can sag to 9 V but U2.vin needs at least 10 V — fine at nominal, brown-out at the bottom of the range.
What it checks
The mirror of over-voltage: each net's worst-case LOW voltage against each pin's declared minimum. A supply declared 9–18 V is checked at 9, not at its nominal.
Why it matters
Designs that only work at nominal voltage fail in the field at the bottom of the range — cold batteries, long cables, brownouts. The symptom is the worst kind: intermittent resets that never reproduce on the bench.
How to fix it
Raise the source's minimum (different supply, shorter cable run, bigger battery), lower the part's requirement (an LDO with less dropout), or add headroom with a boost stage.
This check runs live while you wire
Findings name the exact net and pin, with the numbers behind the verdict. Free, in your browser, no account needed.
Try it on your design →