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what about the design correct?
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Nothing is correct until you simulate and verify it.
Texas Instruments has a SPICE-like tool called TI-TINA. Its developed by another company. I've looked at the free version, but have been underwhelmed by its features. I've used Linear Technology's LTspice tool for simulation of their switch-mode power supplies, and it does a decent job.
Texas Instruments does have low-cost development boards for their power supplies. I'd recommend buying and testing them if you want to use their parts.
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why Altera does not supply the similar reference?
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Because there is no one reference design that meets all users needs. Altera provides the pin-connections guidelines files which have their recommendations for power.
You need to create your own power requirements document, and then draw up a block diagram of the power supplies, and then simulate.
Here's an example
http://www.ovro.caltech.edu/~dwh/wbsddc/ts4_power.pdf This design is still a work-in-progress, as for example, simulation and hardware tests of some of the parts shows they have issues.
Cheers,
Dave
