VCAP layout

[MikeDB]

I'm sure everyone else has noticed how the two pins to VCAP seem to be placed just over a complete side of the package away so there is bound to be some resistance/inductance in the tracking. I was wondering if anybody has ever hit problems with this, or how thick the tracking should be. Also the datasheets and app notes seem a bit inconsistent, some say 2.2uF, some two 2.2uF in parallel and others 4.7uF. Prefer to get the board right first time. Processor is a STMH7 series in 100 pin QFP

[waclawek.jan · Accepted solution]

You are not supposed to connect those two VCAP pins with a track, and you are supposed to place a 2.2uF cap on each.

Get inspired with the Nucleo, I know it's a 144-pin package but the principle is the same.

JW

[MikeDB]

Ah that makes more sense. Thanks