Thanks
We are using NCP3063B for 24V->6V at 20mA, and also for 24V->16V at 50mA
For this purpose, we cant find anything else anywhere near as cheap as the NCP3063B.
The next up seems to be the LM5019, but this costs a lot more.
The NCP3063B has the great advantage of allowing us to set the peak current with the sense resistor, this means we can use a smaller inductor. Some of the othe rmonolithic ones have a high peak current threshold, and no ability to adjust it.
Why do you say NCP3063B is low quality?. We dont mind the bias current, and the switch voltage of around 1V is perfectly OK for us.