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What is the difference between TPS54060A and TPS57060-Q1?

Other Parts Discussed in Thread: TPS54060A, TPS57060-Q1

I found that the junction temperatures for both is very different. It is way higher for the  TPS57060-Q1 than the TPS54060A, this is because I need to replace the  TPS54060A with the TPS57060-Q1, but the TPS57060-Q1 seems much worse in terms of thermal rating> I would also like to know what is the main source of heat dissipation, I would assume it's junction to board, but can you please confirm. I created this table to look at the comparison which I have attached to this post.comparison.xlsx

  • I'm not sure why the thermal performance should be different. Maybe someone from our packaging group may know.
  • A little research reveals:

    I cannot find any difference between TPS54060A and TPS57060-Q1 that would suggest the thermal performance would be different. I verified the model results that were used for TPS54060A are the same as those in the TPS54060A datasheet. The systems engineer also agrees they are the correct ones.

    The datasheet for TPS57060-Q1 was spun from another literature number. I do not have access to that source document, but it is possible that the thermal parameters were not updated to reflect TPS57060-Q1. I did not see a request or results for independent TPS57060-Q1 thermal modeling.

    TPS57060-Q1 belongs to the automotive group so I do not have any insight as to why the data may be different. I will move this post to the automotive forum to see if they can answer.
  • Thanks for the support John, I also found a small mistake on the TPS57060-Q1 datasheet, where the reference voltage is not connected to the negative terminal of the error amplifier. Could help to correct that as it's a little confusing for people using the datasheet.

  • Can Someone please confirm this? Thanks.

  • Let me see if I can find someone from automotive to resolve this.  I was hoping someone would just take the initiative here.

  • Hello,

    I looked at TPS54060A and TPS57060-Q1 datasheet thermal parameter table and in TPS54060A datasheet some of these parameters got mixed up and we will correct it during the next datasheet update.

    Due to the difference in mold compound / lead frame, there will be slight difference between TPS54060A device and TPS57060-Q1 device thermal parameters, but there will be no significant differences.

    Regarding your another question: “reference voltage is not connected to the negative terminal of the error amplifier”, i did not understand it correctly. Are you referring to datasheet block diagram? If so, in my opinion reference voltage is correctly connected to positive terminal of the error amplifier.

    Regards,

    Murthy