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TPS7A4101: TPS7A4101DGNR EXPOSED THERMAL PAD oxidation

Manuel Rosario
Prodigy 220 points
Part Number: TPS7A4101

Tool/software:

Dear Technical Support,

Good day!

Please verify for TPS7A4101DGNR the reported EXPOSED THERMAL PAD oxidation if any concern to further use.

All our remining stock is verified to have the same condition.

Per customer all 24 pcs are looks oxidized. Is this defective? Please
refer email and advise this is defective or not. Replacement is required.

Mouser Part #:

595-TPS7A4101DGNR

Mfr.'s Part #:

TPS7A4101DGNR

Manufacturer:

Texas Instruments

Description:

LDO Voltage Regulators 50Vin 50mA Sgl Out L DO Linear Reg A 595-TPS7A4101DGNT

Lifecycle:

-

Datasheet:

TPS7A4101DGNR Datasheet

 

 

 



Customer Information:
IC LANDO INC
3-3-6 NIHONBASHI-NINGYOCHO
CHUO-KU
TOKYO, 13
JAPAN
011 813 5643

     
Regards,
Manuel

  • 0
    TI__Intellectual 1390 points

    Hey Manuel - thanks for reaching out.

    Could you please help confirm if this only happens to one reel or multiple reels? Do you happen to have a lot# ?

    Thanks,

    Su

  • 0 in reply to Su Zhang
    Prodigy 220 points

    Dear Su,

    Thanks for the verification.

     

    Remaining stock PO’s are:

    029-Y1555 -> datecode 2324+5, lotcode 3111447UT2

    029-5Y248 -> datecode 2327+5 <- same as delivery

    029-A8388 -> datecode 2424+5, lotcode 4053759UT2

    029-AD609 -> datecode 2426+5, lotcode MIXED

     

    Delivery

    P/N# 595-TPS7A4101DGNR, 24 PCS (Mouser PO# 029-5Y248  -> datecode 2327+5)

     

    Regards,
    Manuel

  • 0 in reply to Manuel Rosario
    TI__Intellectual 1390 points

    Thanks Manuel- do you mean we have observed thermal pad oxidation from all these reels?  

    Were these reels just been delivered to customers or have been stored for some time?

    Thanks,

    Su

  • 0 in reply to Su Zhang
    Prodigy 220 points

    Dear Su,

    Delivery to customer on 2025-08-27 for P/N# 595-TPS7A4101DGNR, 24 PCS (Mouser PO# 029-5Y248)

    Below is our stock received date.

     

    Part Number

    Issue COO

    Date Code

    Trans Date Code

    Lot Code

    Received

    PO

    595-TPS7A4101DGNR

    TH

    2324+5 

    2324 

    3111447UT2 

    2023-07-20

    029-Y1555

    595-TPS7A4101DGNR

    TH

    2327+5 

    2327 

     

    2023-09-08

    029-5Y248

    595-TPS7A4101DGNR

    TH

    2424+5 

    2424 

    4053759UT2 

    2024-10-07

    029-A8388

    595-TPS7A4101DGNR

    TH

    2426+5 

    2426 

    MIXED 

    2024-10-21

    029-AD609

     

     

    Regards,
    Manuel

  • 0 in reply to Manuel Rosario
    TI__Intellectual 1390 points

    Hey Manuel- I am checking this with A/T site but could you confirm all the material listed in the table also have oxidation issues? Or only the 24 PCs?

  • 0
    Prodigy 220 points

    Dear Su Zhang,

    Thanks for the coordination. Please share as soon as verified.

    Delivery to customer on 2025-08-27 for P/N# 595-TPS7A4101DGNR, 24 PCS (Mouser PO# 029-5Y248)

    Our remaining stock was verified that the bottom portion already got discolored. PO’s are:

    029-Y1555

    029-5Y248

    029-A8388

    029-AD609

     

    Part Number

    Issue COO

    Date Code

    Trans Date Code

    Lot Code

    Received

    PO

    595-TPS7A4101DGNR

    TH

    2324+5 

    2324 

    3111447UT2 

    2023-07-20

    029-Y1555

    595-TPS7A4101DGNR

    TH

    2327+5 

    2327 

     

    2023-09-08

    029-5Y248

    595-TPS7A4101DGNR

    TH

    2424+5 

    2424 

    4053759UT2 

    2024-10-07

    029-A8388

    595-TPS7A4101DGNR

    TH

    2426+5 

    2426 

    MIXED 

    2024-10-21

    029-AD609

     

     

    Regards,
    Manuel

  • 0 in reply to Su Zhang
    Prodigy 220 points

    Dear Su Zhang,

    Thanks for the coordination. Please share as soon as verified.

    Delivery to customer on 2025-08-27 for P/N# 595-TPS7A4101DGNR, 24 PCS (Mouser PO# 029-5Y248)

    Our remaining stock was verified that the bottom portion already got discolored. PO’s are:

    029-Y1555

    029-5Y248

    029-A8388

    029-AD609

     

    Part Number

    Issue COO

    Date Code

    Trans Date Code

    Lot Code

    Received

    PO

    595-TPS7A4101DGNR

    TH

    2324+5 

    2324 

    3111447UT2 

    2023-07-20

    029-Y1555

    595-TPS7A4101DGNR

    TH

    2327+5 

    2327 

     

    2023-09-08

    029-5Y248

    595-TPS7A4101DGNR

    TH

    2424+5 

    2424 

    4053759UT2 

    2024-10-07

    029-A8388

    595-TPS7A4101DGNR

    TH

    2426+5 

    2426 

    MIXED 

    2024-10-21

    029-AD609

     

     

    Regards,
    Manuel

  • 0 in reply to Manuel Rosario
    Prodigy 220 points

    Dear Su Zhang,

    Please verify.

    Regards,

    Manuel

  • 0 in reply to Manuel Rosario
    TI__Intellectual 1390 points

    Hey Manuel-

    I have been discussing this with A/T site and here are some questions/ feedback: 

    1. For the 24 PCs showing oxidation, did customer only find 24 PCs showing discoloration from one reel or you only received 24 PCs? 

    2. Were the other batches customer received earlier partial reels they kept in the storage room? 

    3. Did the oxidation only happen on the open pocket hole, any other oxidation observed on the lead or other area on the power pad?

    From A/T's experience, they suspected this is related to the customer's environment, but you can contact local FQE and return the affected material to investigate further if needed. 

    Thanks,

    Su

  • 0 in reply to Su Zhang
    Prodigy 220 points

    Dear Su,

    Thanks for the coordination.

    Noted return of  the affected material to investigate further if needed.

     

    To answer 1~3 above, our remaining stock was also verified for the same condition.

    We have not opened the carrier tape, just peek through the visible portion

    at the bottom of the carrier tape that the bottom portion already got discolored

     

    Delivery to customer on 2025-08-27 for P/N# 595-TPS7A4101DGNR, 24 PCS (Mouser PO# 029-5Y248)

    Our remaining stock was verified that the bottom portion already got discolored. PO’s are:

    029-Y1555, 029-5Y248, 029-A8388, 029-AD609

     

    Regards,
    Manuel