Dear Joanathan,
Thanks. But Murata Power supplies are too expensive.
Balakrishna.
You didn't actually mention cost, although you did mention voltage and current.
These devices are very cost-effective when you need a non-engineered solution. I have used them in several custom projects where the production quantity or time-to-market didn't justify the time and expense of R&D for the power supplies. Also, there are generic versions of these devices available from a number of Asian companies at 25-50% of the cost (in quantity). If you are manufacturing thousands of units per month, they probably aren't the correct solution.
The final decision comes down to a lot of factors if you want to engineer the most appropriate solution. Cost is one. Do you have a budget for this section? This answer alone will determine whether you bother to engineer a solution or not.
Regards,
Jonathan Point