Tom Messenger said:
> Check your circuit for the condition noted on the data sheet regarding
> the output voltage EVER getting higher than the input voltage.  If this
> happens, a parasitic SCR gets turned on in the LP2986 and it will then
> get very hot.  The data sheet tells how to avoid this.  So even if you
> don't think that is the problem, try the schottky from Vin to Vout
> (cathode to Vin) as the datasheet suggests. Make sure to put it RIGHT on
> the regulator with shortest leads possible.

That gets my vote too!

Also, the motor diode should be a fast diode if you are doing PWM... A
schottky is a good choice there, based on the voltages you are using.


-Bob

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