Need help finding a suitable voltage regulator IC.

[rock94]

I'm planning to build a dual DC power supply unit over the weekend.The transformer I'm using is a 12-0-12 with a 3 amp output.There seem to be very few voltage regulators with a high output current.I do have the lm338k, but it doesn't seem to have a complementary negative voltage regulator.The only pair I've found online is the lm350/lm333.Unfortunately the lm333 is not available at any store though the lm350 is.Could anyone suggest me a pair with a current output >=3A or any other way around this.Also if I go ahead with the lm338 and build a 1.2-24v variable supply what are the drawbacks when compared to a Dual +12/0/-12 variable supply?Any thoughts or suggestions are welcome.

 

[GUMY]

First You have to decide if You really need dual supply. There are not many applications which require that.

 

[rock94]

First You have to decide if You really need dual supply. There are not many applications which require that.

In college we used dual dc supplies to power op-amp circuits.I will be using it to test most of my DIY projects(Amplifiers at present). I would like to build a dual dc only if I find a good voltage regulator pair(just in case I need it later). Otherwise I'll go ahead with the lm338 design.

 

[crutschow]

Have you looked for an LT1033? It is available from DigiKey and likely others.

 

[rock94]

Have you looked for an LT1033? It is available from DigiKey and likely others.

Thanks,It seems to be quite old though.Unfortunately international shipping from the US is way too costly.

 

[crutschow]

Well, since you didn't post it in your thread, I have no way of knowing where you live.