Designing a multiple output voltage switched power supply

I have been away from electronics design for 4 years, and I was just doing software development. I would like to design a power supply that is switched, and with input voltage ranging from 9vdc to 30vdc, and output voltages of 12dc(0.3A), 5dc(1.2A), 3.3dc(5A). I would like to know what are the options especially I would like to have most components to be Surface mounted and don't need large transformers and coils..etc.

web bench

If you google web bench it will take you to TI's web bench. I plugged in your values and it came back with 2 buck IC's and 1 buck boost. $5.


https://www.ti.com/ww/en/analog/webench/index.shtml?DCMP=sva_webench&HQS=webench

Give it a try and see what you think.

Thanks

Hi,

My personal preference is if this is not a commercial design i like to use individual regulators for each output. That's the best way. Not the cheapest.

It is a commercial design, so how do you like to suggest for that ?