• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 93 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS7A47: power dissipation

Nandini Muralidharan
Intellectual 810 points
Part Number: TPS7A47

Tool/software:

Hi,

For TPS7A4701RGW, the power dissipation per formula 7 is as below. 

VIN 6.5V, Vout 2.5V, Iload 0.407A

Normally for LDOs, Power dissipation is  calculated as [(VIN-VOUT)*Iout + (VIN*Ground current)]. Can the power dissipation due to (VIN*GND current) be ignored for this LDO?

Thanks

  • 0
    TI__Guru 50025 points

    Hi Nandini,

    When the device is operated at load, the power dissipation due to the biasing current is often less than 1% of the total power dissipation, so it's usually neglected. With that said, the biasing current power dissipation is still there, so if you want the most accurate power dissipation calculation you should include it.

    Regards,

    Nick