Looking at your LM22671 to create 18-28V IN, 15.5V OUT, 250mA. I have a question about minimum load current, my load could be as small as 4mA and as high as 205mA, what minimum load must be maintained on this buck regulator? Will 4mA not be enough? Also, if I increase my load to 0.5A to shrink the inductor to a shielded type, what would be the min load at 500mA configuration? Thanks.