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LM2903B-Q1: High-Level Output Leakage Current over Full Range

Shinichi Yokota
Genius 9715 points
Part Number: LM2903B-Q1
Other Parts Discussed in Thread: TL331B-Q1, LM2903, LM2903-Q1, LM2903B

Hello,

I'd like to know about the Max value of LM2903B-Q1's high-level output leakage current IOH-LKG over full temperature range. The data sheet specifies only values at TA = 25 °C.

Best regards,
Shinichi Yokota

  • 0
    TI__Guru 52726 points

    Hello Shinichi,

    The output leakage over temperature is shown in figures 6-28 and 6-29.

    You can use 130nA for a typical temp max. This is for design guidance only and is not warranted.

    The sister singe device, the TL331B-Q1, has a 1000nA over-temp limit (to match the original device).

  • 0 in reply to Paul Grohe
    TI__Genius 9715 points

    Paul,

    Paul Grohe said:
    The output leakage over temperature is shown in figures 6-28 and 6-29.

    Aren't they Figure 3-29 and Figure 3-30? I'm referring to the data sheet SLCS141J. What I need is overall Max, but I guess the figures don't include a process variation.

    Paul Grohe said:
    You can use 130nA for a typical temp max. This is for design guidance only and is not warranted.

    Does "typical temp max" mean the Max value at 25 °C? Again, what I need is the Max possible value including temperature and process variations.

    Paul Grohe said:
    The sister singe device, the TL331B-Q1, has a 1000nA over-temp limit (to match the original device).

    Is it OK to consider the LM2903B-Q1's IOH-LKG value won't exceed 1 µA over temperatures?

    Best regards,
    Shinichi Yokota

  • 0 in reply to Shinichi Yokota
    TI__Guru 52726 points

    Hello Shinichi-san,

    My apologies - I was looking at the LM2903-Q1 datasheet, which has one less image (they are the same graphs). You are correct, figures3-29 and 3-30 .

    All the graphs are "typical", so the graph value at 125°C would be a typical at 125°C (instead of at 25°C). The graphs are a typical of a small device lot and do not include process variations.

    Since leakage currents are not trimmed, they are influenced by process variations. Normally we recommend ±30% for uncontrolled or untested parameters.

    Since the TL331B-Q1 is the same process and the same design (just a single version), you could by associate by a similar design that the limit would be the same.  And before you ask....the TL331B-Q1 over temp leakage was specified because the original device had leakage over temperature specified (leakage current tests take a lot of test time).

    So I would recommend 1uA as a max over temp. Again, since the Ileak limit is not in the LM2903B datasheet, it is not warrantied for the LM2903B. Design guidance only.