Quick call for opinions here... :)
In order to reduce the thermal loading on the power supply of my project, I'm considering adding a DC-DC converter that will drop the voltage from 12V to 5V.
I've been looking over the datasheets for some of the switching controllers that Linear offers - the LT1767 and LTC1474 in particular - but I've lately been starting to wonder...
Given that this will likely be a one-of project, is it worth my while to go through the calculations for putting together a custom switchmode converter, or could I just as easily buy a pre-assembled module - such as the Innoline R-78AA-1.0 or the V-Infinity V78XX-500-SMT - to do the same thing?
From what I've been able to piece together so far, the parts cost for building my own is roughly the same as a fully-assembled and tested module... but are there other factors I should be considering?