LMR33620-Q1: LMR33630-Q1 schematic check

Sherry Liang

Genius 10255 points

Part Number: LMR33620-Q1

Dear team,

Could you please help check the LMR33620-Q1 schematic? Thank you!

Thanks & Best Regards,

Sherry

0 Timothy Hegarty over 4 years ago

Hi Sherry,

Better to use one lower feedback resistor to optimize the layout. Also, you can put a cap after the output ferrite bead.

Regards,

Tim

0 Frank De Stasi over 4 years ago in reply to Timothy Hegarty

It looks like you are using the 5V fixed device in your schematic.

In that case you would not need a FB divider. Not sure what output

voltage you are looking for?

Also, this looks like the RNX package. In that case you will need

two high frequency input bypass caps on either side of the package.

Please see the recommended PCB layout in the data sheet.

0 Sherry Liang over 4 years ago in reply to Frank De Stasi

Hi Frank,

Ok, got it! Thanks for your help!

Best Regards,

Sherry

0 Sherry Liang over 4 years ago in reply to Timothy Hegarty

Hi Timothy,

What's the recommendation value about the cap(after the output ferrite bead)? What is the cap's function?

Thanks & Best Regards,

Sherry

0 Timothy Hegarty over 4 years ago in reply to Sherry Liang

Hi Sherry,

That cap just provides additional post-filtering and lowers the impedance to the load. 10-22uF is sufficient.

Regards,

Tim

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