• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 492 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

TPS7A7200: VIN ≥ VOUT(TARGET) + 0.3 V Required?

Brian Antheunisse
Expert 5305 points
Part Number: TPS7A7200

Hi team,

The datasheet lists the max Vdo as 180mV when Vout is less than 3.3V. However, peppered throughout the datasheet is this little footnote:

VIN ≥ VOUT(TARGET) + 0.3 V

Is this a requirement? aAt 2A, this 120mV difference in your needed Vin is the difference between an extra 240mW of power dissipation, so just trying to figure out what my allowed minimum Vin needs to be for a 1.35 Vout. 

Thanks!

Brian

  • 0
    TI__Guru 55940 points
    Hi Brian,

    The references to Vout(target) + 0.3V you mention refer to test conditions for a specific Electrical Characteristics test or a particular Typical Characteristics curve. In order for the LDO to regulate the output, the headroom (Vin - Vout) required must be greater than dropout.

    Very Respectfully,
    Ryan