I'm working on a few projects where I'll be driving about 8 WS2812B LEDs on a 5V rail with an ATTiny85 (I think the whole circuit is going to draw about .5A; I'm using .75A for my calculations). I'm planning to power this with a lithium ion battery with a nominal voltage of 3.6 volts.
I need to boost the voltage to 5V. I'm considering using the XC9142B50DMR-G step-up converter to do this.
On page 11 of the datasheet (an image is included below), they have a reference implementation and specs for the other components. There seem to be two options for the oscillation frequency: 1.2MHz and 3.0MHz. I can't figure out why I'd prefer one frequency over the other.
One difference appears to be a lower supply current. What does that mean (and if it's an advantage or a disadvantage)? Are there other reasons I'd prefer one frequency to the other?
They also have 2 recommended capacitors but mouser doesn't have them in stock. Can I use any ceramic capacitors that are 10uF and at 10V and an X7T dialectric?