@axillent said:

if you know what you are doing it is also other choice - linkswitch chips LNK302/304/306. The last one can deliver up to 350mA not isolated power directly 5V or 3.3V. It is as efficient as isolated - unloaded it will consume about 0.2W. A bit bigger than SR036. Easy to construct because you do not need custom transformers. For example Duwi zwave wall switches are using this type of the supply. This is my one side SMD version with regulated output:

Hello axillent, I just bought some of those LNK306 and would like to make a test board, could you share your schematic or components you used to make your own?

Thanks a lot.