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Schematics review for TPS73601DBV

triet tran
Prodigy 140 points

Hi All, 

We have some designs using TI's LDO TPS73601DBV as attached schematics, please take a look to see if it is OK.

Appreciate to get any comment on.

Thanks

1072.TPS73601DBV_SCH.pdfTriet Tran

 

 

  • 0
    TI__Expert 8890 points

    Hello,

    The circuit configuration looks good but I am worried about the power dissipated in the sot23 package.  For theta_ja = 200degC/Watt, and 0.6W dissipated in the package the thermal limit will be reached at room temperature.

    Bill

  • 0
    TI__Guru 50190 points

    Hi,

     

    If you have space, you may want to put down pads for capacitors in parallel with R72 and R79. This will help improve transient response if needed.

     

    Regards,

     

    john


  • 0 in reply to JCHK
    TI__Mastermind 36110 points

    I agree that you will have a thermal problem with a TPS73601 SOT-23 package.  I strongly recommend the DRB or DCQ package.  You will need to make sure you have a lot of copper area in your ground plane to dissipate the heat.  Another option is to spread out the heat by adding a resistor in series with the input to the TPS73601.  If you add a 2 ohm resistor in front of the LDO, you will dissipate 0.32W in the resistor and 0.28W in the LDO.  If you choose this option, the TPS73601 intput capacitors must be placed between the resistor and the LDO.