On Jun 13, 2008, at 2:35 AM, Jinx wrote:

> What are your thoughts on the LM350 and LM317 ? I've got
> a heap of them sitting around doing nothing except getting older
>
> The NatSemi Databook has several circuits using them combined
> as adjustable current regulators, and other topologies sharing current
> for higher outputs

Yeah, there are circuits that use 317 for both current and voltage  
regulation, circuits that use paralleled 317s for currents greater  
than 1A, and even circuits that use a 317 as the sorce of negative  
bias current for voltages down below 1.2V.  I've been annoyed for "a  
while" that there isn't one definitive circuit for a "lab" supply  
that uses 317s as THE major active element...

Sigh.
BillW

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