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LM2937: 3.3V

Ray Vincent Aranzaso
Genius 17950 points
Part Number: LM2937

Hi,

Good Day. I have a customer who is working with LM2937ET-3.3/NOPB. Please see below his query for your reference. Thank you very much.

I'm looking at the datasheet for the LM2937ET-3.3 (LM2937ET-3.3/NOPB) and I've noticed section 6 appears to be missing information on the 3.3 version of this product family. I see specifications for the 5V, 8V, 10V, 12V and 15V versions, but nothing for the 3.3V. While I don't think most of this information will be especially critical to our specific use case, I thought it would be important to share this discrepancy.

I would like to confirm the min and max output voltage of this device however.

Best Regards,

Ray Vincent

  • 0
    TI__Guru 50025 points

    Hi Ray,

    Thanks for sharing. I'm not sure why the 3.3V version is not specified, but the good news is that many of the EC specs will be better with lower VOUT, so using the 5V specifications as a reference will serve as a beyond-worst-case scenario. 

    Ray Vincent Aranzaso said:
    I would like to confirm the min and max output voltage of this device however.

    Do you mean the abs max?

    Regards,

    Nick

  • 0 in reply to Nick Butts
    TI__Genius 17950 points

    Hi Nick,

    Yes, like on the table for 5V and so on. Thank you very much.

    Best Regards,

    Ray Vincent

  • 0 in reply to Ray Vincent Aranzaso
    TI__Guru 50025 points

    Hi Ray,

    I found some test data for the 3.3V version, but it's only at room temperature and does not quite constitute the same min/max as the other tables in the EC section. What I can give you is the mean and max, where μ +/- 6σ can be used as the limits. Here is the data for room temp:

     

    Parameter Tested Condition Mean μ  STD_DEV σ
    VOUT Vin=5V, Iout=5mA 3.29481 0.00751488
    Vin=5V, Iout=400mA 3.3028 0.00816501

    Regards,

    Nick