HI
in the datasheet, FB pin voltage variation is about 3% over temperature range
I want to know if this applies to a single device or to a complete production batch of devices ?
if for example at 25C, the FB pin voltage of a single device is 1.19V, what will be its variation over the entire temperature range?
3% or less ?
thanks
Yves
Yves,
The values listed are based on characterization material and represent the entire population of devices and across all recommended operating conditions.
In the last question, you can estimate the behavior of a typical device and the Vfb performance across temperature by looking at Figure 6-4.
It shows the trend of the reference voltage across temperature.
The limits in the datasheet cover full operating range including (temperature, process, line/load, and initial accuracy) along with guardbanding of test limits.
Hopefully this helps answer your question.
If so, please click "This Resolved My Issue"
Regards,
Wade
Hello Yves.
You can also estimate the effects of load on the regulated output by applying the information in the load regulation specification.
It shows a 25c range, and a full temp range for load variation.
For example worst case load regulation is shown for a 1ma to 1A step change. This shows worst case 8mV at 25c, and 18mV across temperature.
Results for a typical unit are given in figure 6-19 across temperature.
If your load is more conservative than the 1 A max load, you can scale the 18mV worst case with your load.
Regards,
Wade
