Re:The ethics of brain boosting
by learc83 on Monday January 30, 2012 @12:21PM
(#3529586)
Sorry my mistake, I was talking without looking at the datasheet.
From the datasheet
>all quiescent operating current is
returned to the output terminal. This imposes the
requirement for a minimum load current. If the load current
is less than this minimum, the output voltage will rise.
I've used an LM317 drawing less than 2mA, so I assumed it was possible (in hindsight I must have used the solution, below).
The solution is very simple however, make a separate parallel circuit that will draw at least 2mA. This can be accomplished just by placing a resistor of appropriate value between the Vout and ground.
From the datasheet
>all quiescent operating current is returned to the output terminal. This imposes the requirement for a minimum load current. If the load current is less than this minimum, the output voltage will rise.
I've used an LM317 drawing less than 2mA, so I assumed it was possible (in hindsight I must have used the solution, below).
The solution is very simple however, make a separate parallel circuit that will draw at least 2mA. This can be accomplished just by placing a resistor of appropriate value between the Vout and ground.