Pre tracking pre regulator

dmta · Nov 15, 2013

Hi all,
How do I use the LM2678 as a tracking pre regulator?
regards

crutschow · Nov 15, 2013

What's the purpose of this "pre tracking pre regulator"?

dmta · Nov 15, 2013

I want to make the dropout voltage of a linear regulator to be about 3V. I need a circuit for that using lm2678

FvM · Nov 15, 2013

The problem seems to suggest a difference amplifier or an equivalent construct. Did you try to design a circuit?

alexan_e · Nov 15, 2013

Apparently the same vague question has been asked in several forums simultaneously, even the 3v requirement was given as an assumption in a reply and not as part of the the OP requirement

https://forum.allaboutcircuits.com/showthread.php?t=91444
https://www.electro-tech-online.com/threads/pre-tracking-pre-regulator.138965/

I would suggest you describe clearly what you are trying to do, the voltages and current involved and the linear regulator you intent to use (assuming you want to use a linear regulator)

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