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Author Topic: Voltage trippler?  (Read 908 times)
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Is there a simple low cost IC that i can use to triple my input voltage? I need to feed an IC 15v and would love not to have to have another PS or buy a DC-DC converter, if not ill buy the converter, im just a bit reluctant to spend the 15 bucks on what seems like a simple task.

I figured ide ask since ive seen doublers like the ADM660.
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why take a higher external voltage (the arduino supply) run it tru a 5 volt regulator then boost it back up?
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It is called a boost converter but it will cost you much more than 15 bucks.
The price depends on the current. What current do you need?
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Im doing this cause im using an ad595 in the same circuit, and it needs to be feed exactly 15v in order to read past a certain temp. I would imagine it needs a minimal amount of current.
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There is an application note for a voltage tripler at Maxim (AN297) It uses the MAX1683,  (3) 10uF caps and a dual schotty. It is probably in the $5-$7 range.
The topology may work with the xx660 chips but I am not sure.

A couple notes -- the switched capacitor boost converters have limited current and
are unregulated. Also the voltage is 3 * VIN minus two diode drops (and whatever
regulator you add).

(* jcl *)
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If you like to recyle old electronics (as I do) you can sometimes find a jem in the junk.  I found a few TL497's in my junk box and they work great at getting 15V from 5V.

Actually, these nice chips are still available New from Mouser electronics (so I guess other vendors have them as well)  Only $1.50 or so each.  The only tricky component needed is a power inductor of the right value.
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Maybe a High-Side Power Supply - used for N-channel MOSFETs.
I've used the MAX1822.
http://datasheets.maxim-ic.com/en/ds/MAX1822.pdf
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Ive decided on buying a doubler. After more research ive found that i dont need to measure over 1800f. Im gonna use the ADM660 that jluciani suggested in an earlier post. Thanks again guys.
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I think you are better off with a doubler. A lot of people make the x660 series doublers
(and doublers in general). You only need two or three caps to get 50-100mA.
The ADM660 is reasonable priced especially considering it is coming from a quality
manufacturer like Analog Devices.

(* jcl *)

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