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LM4050-2.5 thermal hysteresis and temperature coefficient

ABDEL JABAIEH
Prodigy 50 points

hi

1. can you please let me know if the thermal hysteresis for lm4050-2.5 is a permanent change or it is a temporary change. does the part change voltage by 7mv every time we cycle the temperature?

2. is the thermal hysteresis on top of the temp coefficient of ppm? or it is part of the temp coef?

  • 0
    TI__Intellectual 1745 points

    Hi, 

    Sorry for the delay.  I am looking into this, and should be able to get back to you soon.

    Chris

  • 0 in reply to Christopher Dean
    TI__Intellectual 1745 points
    Hi,

    The thermal hysteresis is actually 0.7mV (instead of 7mV) for the 2.5V option (just like the 2V option), this is a datasheet typographical error. Our apologies for the mistake.

    Thermal hysteresis is a typical change in Vout after the part has been exposed to the full temperature range, but does not “stack” on itself every time the part is temp cycled. The change is due to mechanical package deformation due to stresses caused by temperature.

    The thermal hysteresis is separate from the tempco, as this affects the room temperature output voltage, not the “at temp” output voltage.


    Hope that helps you.

    Chris