I just noticed you said I could use a low value resistor instead of an inductor. What exactly do you mean by low value? 1 ohm? 330 ohm? I assume this has an effect on the frequencies that would be filtered? I guess the idea is to create a low-pass filter?
It looks like the LED drivers can run at a minimum of 3V. But I'm driving some white LEDs, so the minimum actually needs to be more like 4V. And my power supply is typically 5V, but could be as low as 4.5V if running on 3 AA's. So I guess to be on the safe side I would need to the voltage drop to be less than 0.5V.