Use the dc-dc-usb for your 12v and inside put 1 or 2 of these gizmos inside it for your 5v 1.5a http://www.digikey.com/product-detai...6-5-ND/2259781 SNO
I'm looking for an intellegent DC to DC converter with both 12v and 5V output, that I can fit in the dash just to power an 8" screen with pure 12v, and 5v for an active USB extension hub. I have used the DCDC-USB from the mp3car store, and it's almost perfect, except it's only got 1 voltage output, and looking over the others I cannot see one that offers 2 outputs.
I had thought I might use one of the intellegent ATX style supplies, but they have lots of other outputs I wont use like 3.3v -12v, and other stuff, that I suspect might give some form of grief down the road if no load is placed on the unused outputs.
I am sure there are several members who have conquered this problem, and am interested in what your solutions were too.
Thanks SNO, I forgot about you posting those regulator devices, so went ahead and ordered 5 of them to have a few around, since I am getting killed on shipping anyways. $30 shipped for 5 brings them down to 6 bucks ea, where one would cost me $14 shipped.
I found mp3car.com is selling used the dc-dc usb for $45 on ebay, with more than 10 available, so I snapped up one of those. They must have had people return them for some reason, but the one I used in my other carpc works flawlessly so I'm happy to save a buck.
I saved some serious coin on my new carpc's build, by purchasing used and equivalent items. Got the i7-3612QM chip for $133 ($250 savings) , and 8GB of Samsung Mac Low Profile ddr3-1600 for $69, from laptop upgrade pulls. I also saved $50 on the USB audio DAC by getting the Hifimediy Saber with the same ESS chip I had in the ODAC. Now I have speed and Windows 7 Pro for only $55 as a Dell OEM cd that installed and activated just fine. I have been getting real lucky finding the deals make this carpc a lot cheaper and better than the last one.
Nice savings, and some good speed too. Yeah I bought a dozen of the 5v and 6 of 3.3v they are soo handy and I see they have a 12v one too now i just have to find it online for sale. Just not sure on the output amperage. Glad it helped SNO