Other Parts Discussed in Thread: LM1117, , REF3030
Hi there,
i have questions regarding comparing temperature drifts (expectation due to datasheet Infos) of different fixed 3.3V linear Regulators.
My main Parameters are Iout= 25mA, Vin= 6V
The first one basically is, is the temperature drift which is to be expected in the range of ~0°C to 80°C better, worse or the same for RE1117-3.3 compared to LM1117IMPX-3.3?
The initial accuracy is not so important, due to the fact that it is calibrated away at first (when units are shipped out), for me the intereting part is the change from/of that value.
If there is by design a difference, what's the explanation behind, the Technology which is used?
As i understand it the LM1117 is a zener trimmed bandgap reference, according to the firstpage of the datasheet.
The REG1117 doesn't say this "by text", but if i compare the functional block diagrams there are a lot of similarities.
When i compare via the Price i can see that LM1117IMPX-3.3 costs on ti.com 0.38, compared to 0.92 for REG1117-3.3 (same package).
Where does the price difference come from, the trimming of REG1117?
Does this trimmming influence the voltage drift?
Does figure 6 of LM1117 datasheet Show "the same thing" as REG1117 datasheet page 7 bottom left graph?
Is there something like an overview/comparison of different Regulators (preferably fixed 3.3V) which is showing (initial) accuracy, temperature influence and such?
Many questions, i know, but if anybody can shine a light on at least some aspects, that would be great.
Have a nice day. BR Michael