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


by memoguy
Tags: 5v@2a, 65v@1a, buck, regulator
memoguy
memoguy is offline
#1
Jan19-13, 05:49 AM
P: 28
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?
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memoguy
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#2
Jan21-13, 04:23 AM
P: 28
BUMP

Is any anyone able to offer any help?
NascentOxygen
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#3
Jan21-13, 04:44 AM
HW Helper
P: 4,708
Quote Quote by memoguy View Post
... and I am not even sure if you can put switching regulators in parallel like that.
I would think you cannot simply parallel them.

NascentOxygen
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#4
Jan21-13, 05:21 AM
HW Helper
P: 4,708

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


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
memoguy is offline
#5
Jan21-13, 05:31 AM
P: 28
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
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#6
Jan21-13, 06:43 AM
HW Helper
P: 4,708
Data sheet here. http://www.onsemi.com/pub/Collateral/LM2596-D.PDF


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