My customer is using the LM2670-adj to generate a 5.6V output from a 28V input. They notice that when they disable the device the output voltage momentarily jumps to ~9V, which is causing problems with downstream circuitry:
They have found that placing a 0.1uF cap on the EN pin slows down the slew rate and the spike disappears.
Why does this spike occur and is there any way to remove it besides adding a cap to the enable line?
I can send a schematic directly if needed.
Regards,
Dan
