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LMZM33602: About Layout for between RFBT, CFF and VOUT

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Guru 21045 points
Part Number: LMZM33602

Hi Team,

 

We would like to know Layout of LMZM33602 in the datasheet.

We can’t find “RFBT, CFF” and “VOUT” connection line in the layout Examples.

So, we guess that this Layout is incorrect.

Is my understanding correct?

If yes, could you please let us know the correct Layout and datasheet update timing?


 

By the way, Layout of LMZ33604(Other device) has “RFBT” and “VOUT” connection line.


 

Regards,

Hide

  • 0
    TI__Guru 50120 points

    Hi Hide,

    Thank you for pointing this out. It looks like the Layout example in the datasheet may be missing a via to the VOUT plane. I will inform the apps engineer who wrote this datasheet to get more clarification. 

    If you looked at the LMZM33602/3EVM document on Figure 11, you can see the VOUT connection is made from a small via from R2 (top feedback resistor) on Top-Side Cooper down to Bottom-Side Copper and back to the large VOUT terminal connectors. 

    Regards,

    Jimmy  

  • 0 in reply to Jimmy Hua
    Guru 21045 points

    Hi Jimmy-san,

    Thank you for your prompt reply and information.

    We would like to know the datasheet update timing.

    I’d greatly appreciate your verification.

    Regards,

    Hide

  • 0 in reply to Hide
    TI__Guru 50120 points

    Hi Hide,

    I was able to get in contact with the apps engineer who wrote the datasheet. This change may take several weeks since this needs to be approved by an internal system. Also the internal system is going through a few reorganizations so please expect delay with any changes. 

    As far as applications design is concerned, I believe the question has been answered. I will drive this to get the datasheet changed. 

    If you have anything else related to electrical performance or PCB layout design please feel free to reply. 

    Regards,

    Jimmy  

  • 0 in reply to Jimmy Hua
    Guru 21045 points

    Hi Jimmy-san,

    Thank you for your response.

    I greatly appreciate your cooperation.

    Regards,

    Hide