Low cost buck regulator - 12v in - 5v@2A & 6.5V@1A out

memoguy

Hi all!

I am looking for a low cost power regulation solution. Simply put, I need to be able to give a system 12v and get outputs of 5V@2A and 6.5V@1A.

I was thinking of using two of these with the output in parallel:
http://australia.rs-online.com/web/p...ators/6727124/

And two of these with the output in parallel:
http://australia.rs-online.com/web/p...ators/6727089/

But that would end up costing $40 and I am not even sure if you can put switching regulators in parallel like that.

So, I am looking for a lower cost solution that is easy to implement. It would be ideal if the components could be bought at RS or Jaycar.

Any ideas?

memoguy

BUMP

Is any anyone able to offer any help?

NascentOxygen

I would think you cannot simply parallel them.

NascentOxygen

Looking back over past posts at the buck converters previously mentioned in construction projects, I note that vk6kro has referred to the LM2596. If price is a good indicator, it looks okay to me! http://www.ebay.com.au/sch/i.html?_nkw=LM2596

I'd need to check the technicalities closer, but with 12V in, you are wanting –5V out? Also, +6.5V?

memoguy

The LM2596 looks good. I am wanting +5v & +6.5v out.

I am not certain how I would define the voltage output. I am thinking I adjust that trim pot.

NascentOxygen

Data sheet here. http://www.onsemi.com/pub/Collateral/LM2596-D.PDF