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[SOLVED] linear regulator with high surg current

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ali-libre

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witch is a better solution
1 , 2 or 3
of course 2 may not work
another question is that T2 in circuit1 are act as base current source or not
 

Hi,

I´d say 3), because the power transistor here works like a voltage source = low impedance for surge currents.

1) is more a current source wich is high impedance for surge currents.


Klaus
 

Circuit 1 is unstable without additional feedback loop compensation. Circuit 2 has errors, as already mentioned. Circuit 3 needs darlington transistors or additional current gain for high output current.

Consider OP output voltage range and required supply.
 

to const current or to regulator...?
 

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