• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 62 subscribers
  • Views 111 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.

LM2651: When does it enter hysteretic mode?

Austin Allen
Intellectual 2355 points
Part Number: LM2651
Other Parts Discussed in Thread: LMR12010,

Hello team,

I have a question regarding the LM2651MTCX-ADJ/NOPB.

It has a hysteretic mode at light loads that could be a problem for my problem, depending on the load at which it drops into that.  The datasheet says 100 mA at 5V input...how can we calculate what load it will drop into hysteretic with a 12V input and ~3.0V output?  Does it occur as soon as the FET current hits zero?  

Thanks

Austin Allen

  • 0
    TI__Mastermind 47030 points

    Hi Austin,

    I just sent you an email about LMR12010. Both LM2651 and LMR12010 are similar. They are non-synchronous buck converter and used Schottky diode to instead of low side  MOSFET. The critical output current depends on Vin/Vout, switching frequency and inductor. See equation as below.

    Thanks,

    Nancy