Justin Richards wrote:
<snip>
> I have routed the 12v (Vin) 2mm trace on the top layer around half of the
> perimeter.
>=20
> I want to route the regulated 5v 2mm trace directly underneath the 12v
> trace.
>=20
> Is this a bad idea.  Should the 5v trace be routed such that it also runs
> on top of the ground plane.
>=20
> The 12v trace will be supplying an inductive load that gets switched on a=
nd
> off and draws about 500mA.

The last is the bit that worries me i.e spike coupling to the 5v rail.
As the pcb designer I would throw it back as a query to the customer.
:-)

George Smith
--=20
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