[SI-LIST] Re: De-coupling capacitor
- From: "Ingraham, Andrew" <Andrew.Ingraham@xxxxxx>
- To: <pradeepa@xxxxxxxxxxxxxxx>
- Date: Mon, 20 Jan 2003 23:29:35 -0500
> the operating voltage is 5V and there is no chance of getting more
> =
> than 5V (since) we are using a 5V regulator.
Not that it matters in your case (with a 63V rating) ... but don't be so
quick to discount the possibility of higher voltages. Some regulators
have turn-on / turn-off transients. Also, many regulators do not sink
current from a "load" device that decides to source current back toward
the regulator's output. And then you need to consider noise transients
on top of your 5V.
> The capacitor is an ordinary =
> 0805 SMD 0.1uF 63V (ceramic).
If it had been an electrolytic, the other possibility would be that it
was installed backwards ... something that we have seen quite a lot of
lately!
Capacitors can also fail from overheating, either from very large ripple
current, or from external heat sources.
And then there's infant mortality, a bad batch, bad workmanship,
purchasing "grey market" components, etc. There are lots of reasons why
it could go bad.
Regards,
Andy
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
