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LM5155: Possible alternatives to replace LM5155

Ryan Wang
Prodigy 90 points
Part Number: LM5155
Other Parts Discussed in Thread: LM5157, , LM5156, LM51561, LM5158, LM5156H, LM51561H

Hello there:

Since the stock availability is not looking good these days for LM5155, I am wondering if there are some other alternatives which can be used at this time. Right now we have a PoE BT design using TPS2323 and LM5155 together. I think LM5156 and LM5157 could be some potential candidates as an alternative, but if you have some other options which can be used as well please kindly let me know. Thanks!

  • 0
    TI__Genius 11215 points

    Hello, 

    Thanks for reaching out. Like you said, the LM5156 ( and LM5156H) would be closest replacement for the LM5155. We also have the LM51561 and LM51561H which have the hiccup mode as additional feature. The LM5157 and LM5158 are also similar, but they have an integrated switch and therefore you might want to check if the spec of the internal switch are fitting your design requirements. Please let us know if you have further questions. 

    Kind regards,
    EM 

  • 0 in reply to EM
    Prodigy 90 points

    Hello EM:

    Thank you so much for your response. I am wondering if there are some non'"LM" family parts which may be used as an alternative. Do you have any suggestions? 

  • +1 in reply to Ryan Wang
    TI__Mastermind 42201 points

    Hi Ryan,

    sorry for the late reply, unfortunately this thread got out of view.

    There is not other pin to pin compatible replacement for the LM5155 except the once discussed above.

    For other suggestions we would need the full specification of the SMPS.

    Best regards,

     Stefan

  • +1 in reply to Stefan Schauer
    TI__Mastermind 42201 points

    Hello Ryan, 

    I have not seen an update on this thread for the last 9 days.

    Maybe you could solve this issue already in the meantime, in this case it would be great to press the is solved button.

    If there is still something open, just let me know with the new details.

    Best regards,

     Stefan