• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 96 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.

TPS552882: Question Regarding UVLO Level

Connor Schutte
Prodigy 40 points
Part Number: TPS552882

Tool/software:

I am designing a battery application that will need to be able to convert a 2.75V-12V to a 5V rail, and am using the TPS552882 buck/boost converter for this. The datasheet mentions that this part has an UVLO threshold of 2.9V typical. 


For our application though, my plan was to just connect our input voltage to the EN/UVLO pin through a 200k resistor, and include a non-populated pull down resistor that we could install later if we need some kind of undervoltage protection. Given this configuration, does the 2.9V UVLO threshold still apply? Can this converter still operate off of a battery that can be as low as 2.75V?

  • 0
    TI__Mastermind 27830 points

    Hi Connor,

    Yes, you can connect EN/UVLO pin with Vin directly, but since Vin is always higher than EN/UVLO threshold, so the device will be abled/disabled according to Vin level.

    And note that, the Vin rising threshold is 3.0V, it means only when Vin is higher than 3.0V, then the device can startup. And after startup, the device can operate down to 2.7Vin.

    BRs,

    Bryce