Matt, I had problems with L5973D some time ago. But that would affect also
5V, which you don't mention. I had to go over almost all components on the
bottom side and found in one case 2 blown caps, and in 2 other cases broken
L5973D-s.
Do you get stable 5V on yours?
Roman
-----Original Message-----
From:
address@hidden
[mailto:address@hidden
rg] On Behalf Of Matthew Currie
Sent: Sunday, October 14, 2007 6:12 PM
To: Paparazzi Devel
Subject: [Paparazzi-devel] Tiny13 3V3 Rail Problem (11 ohms)
Group,
I have a Tiny13 here which was operating happily during the
day and upon returning the next, it was not. I was powering
it with ~ 17V inadvertently which may be relevant to the
problem. The symptoms I observed were the 3V3 line coming on
briefly and then dropping out, pulsing about once per second
or so. I removed the LM1117 regulator IC and now measure 11
ohms across the GND and 3V3 rail. Before I begin tearing
components off I wanted to run this past others in case they
came across something similar. I can't picture what would be
causing 11 ohms of conductance across the rail. In summary,
it ran for almost 24 hours at a high voltage (17V) so if
something burnt up, this would explain it.
Regards,
Matthew Currie
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