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<DIV><FONT face=Arial size=2>I have a problem. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have a power supply that has a 15 volt input
supplying voltage to a 7810, then, I take the 10v out from there and put it into
an LTC1044A. But, for some reason, after being on for about 15 minutes, the
LTC1044A dies. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>BTW, the 1044 is a switching type
regulator.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Now, my question is, could the 7810 be allowing a
spike on power-on to get past regulation and damage the LTC1044A? I would think
it unlikely, but I am wondering if anyone has had such experiences with this
sort of thing. Changing the LTC1044a merely smokes another
LTC1044a.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I am seriously believing its this 7810, but, the
7810 does not seem to be out of regulation, on the contrary is is holding a very
solid 10 volts exactly according to my recently cal'd scope.I have not been able
to capture the power on spike either.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>What gives?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Rob</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV></BODY></HTML>