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TPS769: TPS76950

Part Number: TPS769

Hello,

I have a query on the TPS76950  5V output SOT23-5 Linear regulator. I'm using it at low output current 1 - 2mA and would like to know the approximate typical output voltage tolerance over -20 degree C to +55 degree C. If this is not available I would like to know the typical output voltage setpoint at room temperature.

Kind Regards,

Seamus

  • Hi Seamus,

    While the datasheet does not have the plots you are looking for, it does have information in the figures that we can use to make an educated guess. Figures 2 and 3 show show that for the 1.5V and 3.3V versions both only have a deviation on the order of 1-2mV with Iout=1mA. This deviation doesn't really change between these versions, so it is a pretty safe bet that the same holds mostly true for the 5V version. At worse, you may want to add a couple mV, so maybe 3-4mV could be a good guess for the deviation due to load current. 

    The deviation due to temperature is a little more tricky, but we an still make a worst-case guess as to how much deviation you might see. Figures 5 and 6 show the deviation due to temperature for the 2.5V and 3.3V versions. The 3.3V version has a larger deviation than the 2.5V version, so we can make the same for the 5V version compared to the 3.3V version. The 3.3V version at Iout=1mA shows a max max deviation from room temperature in the range -20C to 55C of about 10-12mV according to Figure 6. The 5V version will likely be a little worse, so we could say that it likely is around twice the deviation of the 3.3V version as a worst-case, so about 20-25mV deviation max. 

    So, I think a good estimation of the total deviation over temperature and with load current would be about 23-29mV.

    Hope this helps,

    Nick