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LM5071: Longevity of supply

Steven Richardson28
Prodigy 30 points
Part Number: LM5071
Other Parts Discussed in Thread: TPS23753A

Hi, we have an existing design using the LM5071 PoE IC and are looking to update the product.

To de-risk the venture we are looking to see if we can use the existing PoE circuit and if there is any longevity issues going to arise for the LM5071 as this is already an old part.

  • 0
    TI__Expert 5615 points
    Hello Steven and thank you for your question. There are two ways to answer it:

    1) Manufacturing/purchasing perspective: From this view, there are no current plans to obsolete the LM5071. If you design it into a future product, shipments from your own demand will very likely be enough to maintain the part alone as we take a very conservative approach to product obsolescence.
    2) Support/applications perspective: From this view, I would suggest you consider the TPS23753A instead (as the LM5071 product folder suggests). We have retired deep technical support (EVMs, reference designs. etc.) for the LM5071 and increased it for the TPS23753A. A quick scan of the TI reference design library illustrates my point (www.ti.com/.../refdesignsearchresults.tsp) - the LM5071 has zero designs while the TPS23753A has 16!

    In short, if your goal is to "copy/paste" that portion of your design into a new model in order to maximize your IP reuse, the LM5071 is a fine choice. If, however, you would like to update your design (to be more efficient or with a different power rails, for example) and desire deep technical support from TI, the TPS23753A is a better choice. This is especially true if you wish to make your end equipment EA certified and apply for the new PoE logo (e2e.ti.com/.../would-you-like-a-logo-to-go-with-your-poe-system as we have 3 certified designs ready for you to copy and paste which utilize the TPS23753A:

    http://www.ti.com/tool/PMP9175
    www.ti.com/.../tps23753aevm-001
    http://www.ti.com/tool/PMP8803

    In either case, thank you for considering Texas Instruments for your PoE needs.