voltage regulator

[Fahime]

Is there any 3V voltage regulator? If yes, What is its Ic name?

 

[Papabravo]

Here's one from Micrel
**broken link removed**

 

[Hero999]

Current?

Input voltage?

What's wrong with the LM317?

 

[Papabravo]

Current?

Input voltage?

What's wrong with the LM317?

He gave no precise specifications to insure a wide range of choices.

 

[Hero999]

Sorry, that wasn't directed that at you, but the origional poster.

 

[Papabravo]

Sorry, that wasn't directed that at you, but the origional poster.

I didn't think it was and in fact an LM317 is probably just as good as any other choice in the absence of specific requirements. But I always like to be different when I have the latitude.

 

[hotwaterwizard]

LM3940 will do the trick.

 

[Papabravo]

I thought he asked for a 3V regulator. The LM3940 is a 3.3 V regulator, or did I miss something?

 

[mvs sarma]

Is there any 3V voltage regulator? If yes, What is its Ic name?

Hi
what input voltage you have to give-- if it is 5V you alraedy got reply
you may also try out lm7833

 

[hotwaterwizard]

Nothing a diode can't fix

 

[Papabravo]

Nothing the ability to gurgle...er google can't fix either

 

[Fahime]

12v

Hi
what input voltage you have to give-- if it is 5V you alraedy got reply
you may also try out lm7833

I need a 12V to 3V regulator.

 

[Papabravo]

I need a 12V to 3V regulator.

OK the Micrel part or the LM317 will do the job, but be careful how much load current you try to supply. I think 100 mA, which will disipate 900 mW should be about the limit. If you need more current then consider a BAHS and a BAF. That's a Big A** Heat Sink and a Big A** Fan.

 

[Hero999]

Nothing a diode can't fix

A diode would give 2.7 to 2.3V on the output depending on the load which might be too low for it to operate reliably.

I wouldn't worry about it 3.3V is close enough.

 

[Papabravo]

I think the wizard meant a schottky diode. The Vf is 0.2V to 0.3V depending on the current.

 

[hotwaterwizard]

No I meant Regular Diodes.

 

[Papabravo]

Why would you put this on the output of a 3.3 Volt regulator? Or are you saying this will do the whole job of providing 3V from a higher input.

 

[Nigel Goodwin]

Well we're now on the second page of this thread!, and we still don't even really know what the OP wants, or what the spec might be?. I would imagine that it's highly possible that a 3.3V regulator would be perfectly fine?, it's also quite possible that something else entirely might be better? - but like all these questions with no details there may be a better way to do what he wants (if we just knew what it was).

 

[hotwaterwizard]

A diode will drop less than 1 volt 0.6 volts for each diode

 

[Fahime]

I think a LM317 with diods will do the job. I'm practicing it. Thanks for all.