LP2985: LP2985

Egor Trapygin

Intellectual 340 points

Part Number: LP2985

On my circuits from Texas also is absent marking from bottom side. This is normal or not?

over 4 years ago

0 Jason Song over 4 years ago

TI__Mastermind 23361 points

Hi Egor,

The TI top marking database only returns "L0RA" for this device, so it should be good. Here is the link that you may use to find the marking.

https://www.ti.com/packaging/docs/partlookup.tsp#divline

Regards,
Jason

0 Egor Trapygin over 4 years ago in reply to Jason Song

Intellectual 340 points

But marking is absent on bottom side, this is normal? You can help me in this?

0 Jason Song over 4 years ago in reply to Egor Trapygin

TI__Mastermind 23361 points

Hi Egor,

Let me reach to our QA to confirm, please allow 2 business day for me to get back to you.

Regards,
Jason

0 Egor Trapygin over 4 years ago in reply to Jason Song

Intellectual 340 points

Thanks, i wait answer from you

0 Jason Song over 4 years ago in reply to Egor Trapygin

TI__Mastermind 23361 points

I have sent out the inquiry and I will get back to you as soon as I hear back from them.

0 Jason Song over 4 years ago in reply to Jason Song

TI__Mastermind 23361 points

Hi Egor,

Will you please help to provide where those units have been obtained? Do you have any lot trace code or any traceable information from the package when the parts were received?

Regards,
Jason Song

0 Egor Trapygin over 4 years ago in reply to Jason Song

Intellectual 340 points

I apologize but I don t have information about lot trace code or traceable.

0 Jason Song over 4 years ago in reply to Egor Trapygin

TI__Mastermind 23361 points

Can we know where you've ordered those parts?

0 Egor Trapygin over 4 years ago in reply to Jason Song

Intellectual 340 points

We wasn't to order. I am working in research laboratory, we researched this circuit. Why you ask me?

0 Jason Song over 4 years ago in reply to Egor Trapygin

TI__Mastermind 23361 points

It's for our internal investigation. As you suggested, normally they would contain bottom marking, and our quality engineer needs some additional information to confirm whether it's normal for some parts not to have the bottom marking.

0 Egor Trapygin over 4 years ago in reply to Jason Song

Intellectual 340 points

Please help me to understand

0 Jason Song over 4 years ago in reply to Egor Trapygin

TI__Mastermind 23361 points

I am working with the QA and will try to confirm it with you soon.

0 Egor Trapygin over 4 years ago in reply to Jason Song

Intellectual 340 points

Thanks

0 Jason Song over 4 years ago in reply to Egor Trapygin

TI__Mastermind 23361 points

Hi Egor,

Based on the feedback from our QA, that bottom mark should exist. The top mark ‘L0RA’ only identifies the device. However nearly all of our devices include a datecode or lot trace code marking for traceability. The bottom marking would be that datecode or lot trace code. This information may also be encoded in binary within the topmark but that does not appear to be the case. These do not appear to be legitimate TI parts if they are missing the bottom marking.

If you wish to do so, they may make a counterfeit report at https://www.ti.com/support-quality/quality-policies-procedures/anti-counterfeit.html

However if you have no idea where the parts came from or do not have a papertrail, there is not much we can do. If you are just needing some samples of devices you can obtain free samples on TI.com

Regards,
Jason Song

Power management

Power management forum

LP2985: LP2985