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LMZM33603EVM: No load current at 15mA

Viktorija Cecil
Mastermind 18181 points
Part Number: LMZM33603EVM
Other Parts Discussed in Thread: LMZM33603

Customer is asking if LMZM33603EVM drawing 15mA in no load condition is normal?:

If I disable it, the current drawn is 650uA, which is expected, but in case of no load or light load, 15mA seems excessive. Please confirm if my reading is correct.

 Input: 18V

Output: 10V

Enable Hi

Current monitor on the input side. 14.5mA @ 18V

Thanks

Viktorija

  • 0
    TI__Guru 50120 points

    Hi Viktorija,

    Please expect an answer by end of tomorrow.

    I will go into the lab and power an unboxed LMZM33603EVM and check input current consumption for your application. 

    Jimmy 

  • 0 in reply to Jimmy Hua
    TI__Guru 50120 points

    Hi Viktorija,

    For your application listed above, I have confirmed the following current DMM measurements connected in series to an unboxed LMZM33603EVM :

    • I_in  (EN Low / No Load) = 555uA
    • I_in (EN High / No Load) = 12.28mA

    This is the typical expected behavior of the LMZM33603 during idle no load condition. 

    Regards,

    Jimmy