[SI-LIST] Re: Reg: No of Decoupling capacitors
- From: "Dharmendra Gowra" <dharmendra.gowra@xxxxxxxxxxxx>
- To: <marimuthu_p@xxxxxxxxxxxx>, "SI-List" <si-list@xxxxxxxxxxxxx>
- Date: Tue, 30 May 2006 12:23:02 +0530
Hi Marimuthu,
Regarding the voltage rating of a capacitor it should be twice the
voltage applied.
Ceramic capacitors are used for high frequency noise rejection, so you
can have one ceramic decap for each pin.=20
Bulk capacitor values will be decided by your peak load current and
switching frequency. So you should calculate the peak load current and
then apply the following formula.
C =3D I*dt/dv. (Wher I is ur load current.)=20
Thanks
Dharmendra.G=20
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Marimuthu P.
Sent: Tuesday, May 30, 2006 11:30 AM
To: SI-List
Subject: [SI-LIST] Reg: No of Decoupling capacitors
Hi All,
Can anyone tell about how to select the no of decoupling capacitors
and its
voltage value for a particular chip in the board?
For example I am using one chip which has ten 3.3V power pins and twenty
5V
pins. How many bulk and ceramic capacitors I have to put for decoupling
and
what should be the voltage value of those capacitors.
Thanks and Regards
Marimuthu P
-- Attached file included as plaintext by Ecartis --
-- File: disclaimer.txt
------------------------------------------------------------------------
-----------------------------------------------------
Disclaimer
------------------------------------------------------------------------
-----------------------------------------------------
"This message(including attachment if any)is confidential and may be
privileged.Before opening attachments please check them
for viruses and defects.MindTree Consulting Private Limited
(MindTree)will not be responsible for any viruses or defects or
any forwarded attachments emanating either from within MindTree or
outside.If you have received this message by mistake please notify the
sender by return e-mail and delete this message from your system. Any
unauthorized use or dissemination of this message in whole or in part is
strictly prohibited. Please note that e-mails are susceptible to change
and MindTree shall not be liable for any improper, untimely or
incomplete transmission."
------------------------------------------------------------------------
-----------------------------------------------------
------------------------------------------------------------------
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 FAQ wiki page is located at:
http://si-list.org/wiki/wiki.pl?Si-List_FAQ
List technical documents are available at:
http://www.si-list.org
List archives are viewable at: =20
//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
=20
********************** Legal Disclaimer ****************************
"This email may contain confidential and privileged material for the sole u=
se of the intended recipient. Any unauthorized review, use or distribution=
by others is strictly prohibited. If you have received the message in err=
or, please advise the sender by reply email and delete the message. Thank y=
ou."
**********************************************************************
------------------------------------------------------------------
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 FAQ wiki page is located at:
http://si-list.org/wiki/wiki.pl?Si-List_FAQ
List technical documents are available at:
http://www.si-list.org
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:
