• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 58 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.

TPS768-Q1: Can TPS76801-Q1 output a voltage less than 1.2V?

Yuxi Liu(Tony)
Intellectual 1000 points
Part Number: TPS768-Q1

Hi TIer

My customer uses this adjustable version of the LDO to output a voltage of 1.2V. However, due to resistance accuracy issues, the setting voltage of the voltage dividing resistor may be around 1.15V~1.18V. The customer wants to know whether there are hidden dangers and risks in such an output?

Also I saw that our internal reference voltage is 1.1834, what happens when our external setting is less than the reference voltage?

I think that if the output voltage continues to be lower than the reference voltage, the pass MOSFET will continue to increase the degree of conduction, and eventually the output voltage will stabilize to the reference voltage of 1.1834V without the output being lower than the reference voltage. Is my understanding correct?

  • 0
    TI__Expert 5231 points

    Hello,

    Thank you for your question. The output voltage cannot be less than Vref because of the 1 value that is added the feedback resistors in the equation. You would not see this case where Vout is less than Vref. There should be no issues with some deviation in the accuracy of the resistors. 

    Please let me know if you have any further questions.

    Thank you,

    Josh Nachassi