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TLV627432: Iout capability confirm about TLV627432

Jiayu Ye
Intellectual 1790 points
Part Number: TLV627432

Dear TI,

 

In our case, TLV627432  is used to regulate V_battery(3.2V~4.4V) to Vout 1.8V. Here we want to confirm with you if Iout can reach 400mA @ 1,8Vout.

Because we found below description in datasheet. Now Vout=1.8V,   2.15V<Vout+0.7V<3V, does it mean Iout max is only 300mA?

But I also found the efficiency curves in datasheet like below; it seems Iout can reach 400mA @ 1.8Vout under test. I am a little confused about the conflication. Thanks for help.

 

  • 0
    TI__Mastermind 22840 points

    Hi Jiayu,

    The 'Recommended Operating Conditions' table shows that the device can be operated upto 300mA with 1.8V Vout. This is taking into consideration the entire range of Operating junction temperature.  

    The efficiency plot is generally captured only at ambient temperature. 

    I hope this helps! If you do not have any further questions, I will go ahead and close this thread.

    Regards,

    Febin

  • 0 in reply to Febin
    TI__Intellectual 1790 points

    Hi  Febin,

    So you mean, you don't suggest customer to use Iout exceed 300mA when Vout=1.8V, right? To be honest, their actual demand is nearly 300mA, but they want some buffer to confirm no risk. According to your reply, we may lose this chance.

  • 0 in reply to Jiayu Ye
    TI__Mastermind 22840 points

    Hi Jiayu,

    Yes, that's right! For a Vout of 1.8V, it is recommended to operate only at 300mA.

    But what is their operating temp range?

    Regards,

    Febin

  • 0 in reply to Febin
    TI__Mastermind 22840 points

    Hi Jiayu,

    After a short discussion with my team internally, I would like to clarify my answer on your question.

    The above description means the following:

    VIN needs to meet two conditions so that the device can deliver 400mA max.

    1. VIN needs to be equal/higher than 3V (If VIN is only higher than 2.15, we can only guarantee 300mA)
    2. VIN needs to be equal/higher than VOUT + 0.7V (which is 2.5V in this case)

    So, in your case the device can deliver 400mA. I apologize for the confusion and please let me know if you have further questions.

    Regards,

    Febin

  • 0 in reply to Febin
    TI__Mastermind 22840 points

    Hi Jiayu,

    I hope I could clarify your question. I will go ahead and close this post. Please feel free to reach out to us for any further support.

    Regards,

    Febin