Hi,
@D.A.(Tony)Stewart:
You say you have concerns about heat.
It´s not clear to me what exactly you mean.
* You calaculate capacitor energy ... and thus loss at power up. So far so good. There are only diodes in sereis, and they usually are rugged enough to handle such capacitive loads.
* then you talk about regulator. There are two. One is the 5V SMPS, the other is the 3.3V linear one.
The switching one - with the new layout - has good heat spreading with the two sides copper area. I expect it to rather relaxed be able to spread 2W. So wit 2W loss we talk about 10W output power. or 2A. I don´t know what´s the drawn output power ... but I expect it to be beow 1A.
* the linear one:1.7V drop x lets say 250mA = about 0.4W. O.K. I guess it becomes hotter than the switcher. (depending on current) Bigger copper area should be easy to implement. and thermal vias.
I did not read the datasheets ... so my thoughts are not confirmed.
Klaus
Where do you measure this noise ... with respect to what?I am getting a noise at a range of between 500mv and 1V.
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