[sdiy] L7915 - Confusion

[David Schwan]

Cascading the regulators will cascade any noise contribution from each  
regulator. If you are concerned about noise run each regulator from  
the original unregulated source.


Sent from my iPhone

On Jan 21, 2011, at 3:47 PM, <lanterma at ece.gatech.edu> wrote:

>
> On Jan 21, 2011, at 5:30 PM, Matthew Smith wrote:
>
>> Just for the record, this is a little +15/-15V 0.6A bench supply  
>> I'm putting together with ammeters on both rails for development  
>> and debugging purposes.
>
> Speaking of which... I'm working on something similar...
>
> If one wants multiple voltages - say 5V, 9V, 12V, and 15V, in some  
> combination - is it better to "cascade" voltage regulators? (I.e.  
> get 12 V from 15, 9 V from 12 V, 12 V, 5 V from 9, etc.), or  
> "parallel" them (have all the regulators get their inputs from the  
> same original >15V supply)?
>
> - Aaron
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