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LMZ14203H

Other Parts Discussed in Thread: LMZ14203H

Hello. Our distributors talked about a shortage releated to the LMZ14203H. When can we expect the next delivery of this circuit?

  • Hello Otto, 

    Do you have a local sales office you can contact? They may have more detailed information.

    In the meantime, I will see what I can find out here. 

    Regards, 

    Denislav

  • Hello Otto, 

    The message I got is that lead times right now are longer than normal, but we are planning to improve this with increased capacity coming online later in Q1.

    Regards, 
    Denislav 

  • Hi Denislav

    Our PCB assembler has said that there is a recall on this product due to quality issues, can you please find out if that true or not!

    Thanks

    Ken

     

  • Ken Summerbell said:

    Hi Denislav

    Our PCB assembler has said that there is a recall on this product due to quality issues, can you please find out if that true or not!

    Thanks

    Ken

     

    Hi Denislav,

    I'm a hardware engineer in the UK working with an RF power amplifier design that uses the LMZ14203TZ version, and we are seeing a large failure rate of these devices, mostly straight from the reel. We see  a mixture of short-circuits to ground on VIN, VOUT and EN pins. Is there a known issues with these parts recently (as Ken asked above!). 

    Many thanks,

    Oli.

  • Hello Ken, 

    I have not heard of a recall on these parts.

    Hello Oliver, 

    This seems bizarre, all units go through final test before going into the reel. Are the shorts measured on your board after placement or before that? Please contact Rahul Mahajan (our Failure Analysis contact) at rahul.mahajan@ti.com to follow up on this failure. 


    Regards, 

    Denislav

  • Hi Denislav,

    I have the same problem of Oliver...

    I have 10% of fails on the LMZ14203H.  Sometimes I can measure short circuit between IN and GND, sometimes between IN and OUT, sometimes I have some strange impedence between FB and GND. Some other times the component seems to be OK after the parametric test, but it do not work when I turn it on.

    I tested the components on our board, thus after the soldering process, but I verified that the thermal profile perfectly match with that specified by the LMZ14203H datasheet.

    How can I solve this isseu? May it depends on the stock? Do I need to bake those components before soldering them?

    Regards,

    Alessandro

  • Hi Alessandro,

    In a way, I'm glad that somebody else (you) has seen this issue, and not just me, but of course, also not happy that you have suffered failures as I know how much time and money it can lose!

    I was never able to pin-point the exact cause of failure with this part, as I did not arrange for any failed LMZ14203s to be returned to Texas Instruments or another company capable of failure analysis.

    I still believe that in my case, it was a batch problem, since I had three different batch codes and only saw the failures from one of those (consecutive) codes. Of course, this could have been a statistical fluke...

    I hope that you can get some assistance from TI to determine the failure cause, as I would still be interested to know:

    1) if the failing parts are genuine TI or counterfeit

    2) why they failed?

    Regards,

    Oli.

  • I am also seeing a number of failures of this part. Was there any resolution on batch problems etc?
  • Hi Ian,

    Is this still an issue? If so, Please start a new thread with as much information as possible. Replies to posts more than 2 years old are typically marked as closed and apologize for the delay.

    Thanks,
    Anston