I'm trying to drive both discrete LEDs and an OptoTriac directly from the KW41Z with the DC-DC in Buck mode and V I/O at 1.8V. After some digging in the data sheet I found the low power current to be 2.5 mA. The forward voltage of the optotriacs seems to be 1-1.6V. They have a max current of 60 mA, but it looks like I won't come close to that.
Any comments on driving them directly from the pins with no dropping resistors?
Yes, I could set the dc-dc to 3 or 3.3 V, and the main reason I might have to do that is if I want an RGB or blue LED.