> I don't know if I will convince you, but we are repeately dealing
> with power supply parts that will not come up due to the inrush
> current of the board.  The power supply has overcurrent protection.
> The worst is a computer motherboard.  Some of the power components
> have a "soft start" feature that lets you ramp up slowly.  But the
> spec for ATX power supplies has a minimum risetime spec...

Also, some DC-DC converter modules have a maximum output capacitance spec.
In one case where we were cleaning up a design after Vinny, the output of
a DC-DC converter would not come up right reliably.  It had 100uF on its
output, and it worked when I took off enough caps to bring it below the
47uF maximum specified by the manufacturer.


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