Part Number: TL431
The temperature deviation of the reference is positive. Do you know if the reference always moves in the same positive direction with increasing temp? We use this part to set up a stable droop characteristic and a customer wants us to do a worse case analysis. They pointed to the drift of our reference as a possible issue but I assured them that the drift from part to part goes in the same direction with increasing temp. Just want to verify.
As can be seen by figure 1 from the datasheet (below) that the output voltage does not necessarily rise with temperature.
The temperature variation is described as the difference between the min and max value obtained. The max value can appear anywhere, and on a typical part it can be around 25C.
Regards, Diego Lewis
In reply to Diego Lewis:
In reply to John Wallace1:
Hi John, We don't have any data on the shape of the temperature variation on a large set of TL431s. As I mentioned above, it is likely that most parts will have a similar shape (Vout decreases as temp increases past 25C), but we cannot guarantee the shape. Regards, Diego
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