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LMR14030: LMR14030

Ian Wang
Mastermind 29750 points
Part Number: LMR14030

Dear Sir,

Looks EN pin of LMR14030 have leakage voltage in PULL-HI Power.

It will drop from 1.8V to 1V.. even 0.7V, sometimes, EN Pin will pull hi by internal current source,

1. Does LMR14030 with re-try or re-start function?

2. What operation in EN Pin internal Current Source?

3. EN setting UVLO is pull HI to Vin, what if Pull HI to others voltage?

ex: Vin=14V, EN pin PULL HI to  3.3V.

Enable re-rising                                                                        

   Enable falling

　 　

 Thanks, Ian.

 

  • 0
    TI__Mastermind 34875 points
    Hi Ian,

    Can you pls also upload more detail external circuit of EN pin?

    LMR14030 has no retry function if EN or VIN pin below UVLO, EN pin keep sourcing out 1uA or 4.6uA (EN>1.2V UNLO level) current after VIN >3.7V UVLO. EN pin be pull high to any level <=VIN.