I'm building a dual regulator and I want to beef up the current capability using pass transistors.


I have a good schematic from rason.org that shows how the transisrors are connected to the positive regulator chip.

But I can't find a schematic for how to connect the pass transistors for the negative regulator side.


I'm still unable to post diagrams here, they show up as a red x, but here is the regulator I want to beef up:

http://www.geocities.com/hamfiles/DualPowerSupply.htm




and here is a ciruit for the positive side:

http://www.geocities.com/hamfiles/passtrans.htm


Could I simply switch the PNP and NPN transistors, and connect it that way, to the negative regulator, or would I connect it an entirely different way?


Thanks for any responses.

:?:

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Download this datasheet http://eu.st.com/stonline/books/pdf/docs/2149.pdf

It has schematic showing connection of series pass transistor for negative regulators on page number 9 & 10.

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Thanks, this is exactly what I needed.

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