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Vabzter

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Posts: 26
Sweden

Choosing correct load capacitor for SC DC DC Buck converter
Sep 05^th, 2011, 11:17pm

Hello all,
� � � � � � �I am designing a Buck DC DC Switch cap converter for 3.3 Vin and 1.8 Vout, load current 10mA. Can anyone give me some references detailing the relation between charge transfer capacitors and load capacitor?

� � � � � � From one IEEE paper it was mentioned that the load capacitor directly affects the output ripple for a particular switching frequency. But is there any relation of Cl with load current, charge transfer caps and any other parameters?

Thank you for your help,
Vab

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loose-electron Senior Fellow Offline Best Design Tool = Capable Designers Posts: 1638 San Diego California	Re: Choosing correct load capacitor for SC DC DC Buck converter Reply #1 - Sep 14^th, 2011, 12:19pm Suggest - get out of the IEEE papers and go read some of the industry papers out there on these types of converters. Intersil and others have writeups on how to select these components for their versions of these converters. Application notes on these products will have writeups.
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Vabzter Junior Member Offline Posts: 26 Sweden	Re: Choosing correct load capacitor for SC DC DC Buck converter Reply #2 - Sep 14^th, 2011, 7:33pm Thanks for your suggestions..
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loose-electron Senior Fellow Offline Best Design Tool = Capable Designers Posts: 1638 San Diego California	Re: Choosing correct load capacitor for SC DC DC Buck converter Reply #3 - Sep 18^th, 2011, 1:41pm Not a problem. The IEEE is often not the most useful source of information. Even though I am a chapter chair for the IEEE and I review for the MTT and SSC journals, I generally see that the material that is "practical" never ends up in the IEEE publications.
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Arie Aandewiel

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2 Sun Ct, Norcross, GA 30092

Re: Choosing correct load capacitor for SC DC DC Buck converter
Reply #4 - Sep 19^th, 2011, 12:27am

loose-electron wrote on Sep 14^th, 2011, 12:19pm:

Suggest - get out of the IEEE papers and go read some of the industry papers out there on these types of converters. Intersil and others have writeups on how to select these components for their versions of these converters.

Application notes on these products will have writeups.

Could you able to provide any IEEE paper in through this post? Thanks in advance.

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loose-electron Senior Fellow Offline Best Design Tool = Capable Designers Posts: 1638 San Diego California	Re: Choosing correct load capacitor for SC DC DC Buck converter Reply #5 - Oct 1^st, 2011, 2:59pm I am not sure what you are asking for. I am saying go read the application notes from industry manufacturers of these products. Google search!
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