LMR33630-Q1: What is CHF used for?

Elec Cheng

Part Number: LMR33630-Q1
Other Parts Discussed in Thread: LMR33630

Hi Expert,

Below pic is from LMR33630-Q1 datasheet. I don't really know what's CHF used for? Why do we need this cap here? Could you please help to clarify? Thanks a lot!

BR,

Elec Cheng

over 2 years ago

0 Frank De Stasi over 2 years ago

TI__Guru 57555 points

Hello

The CHF capacitor provides a low impedance path for the high frequency switching currents in the DC/DC converter.

It is important to use the correct value and physical placement, as recommended in the data sheet, to obtain correct performance of the regulator.

This is true of any DC/DC converter, not just the LMR33630.

I have attached some helpful links and articles that you may want to look at.

Thanks

https://www.protoexpress.com/blog/decoupling-capacitor-use/

https://www.sciencedirect.com/topics/engineering/bypass-capacitor

REN_an1325_APN_20040119.pdf

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LMR33630-Q1: What is CHF used for?