I'm trying to build an accessory power device for my motorcycle. At the moment I'm using the board from a ripped apart USB car charger for the 5 V part, but I'm trying to build a complete circuit.
I've reviewed this answer, but I still can't work out what values I need to use for each component to get the output I want.
I'll be delivering anything between 11.2 V and 14 V into the circuit. I would like to get 5 V out at up to 1.5 A. Looking at the datasheet it says it will do 1.5 A out. However, when I try and use an online calculator it tells me that the switch peak for the circuit would be 3000 mA and that exceeds the 1500 mA max value. From what I can tell, this is because I'm trying to go from 12 V to 5 V.
Can I do what I'm trying to with the MC33063A or do I need to look at a different component to base the circuit around? If so, which should I be looking at?
For the record, the reason I want 1.5A out of the 5V circuit is that I want to be able to power / charge a GPS (TomTom Rider) and also a bluetooth USB dongle. I would also like the ability to charge a phone (iPhone 4 / 4S / Samsung S3) when not using the GPS and bluetooth dongle.