Hello Good evening ,, i am new to this plateform ,, i am searching the solution i want stable output from 4v input DC i want aprox 2v aprox regulated but input currect also should be very low when No Load at the output
please help me to solve this problom

Mod: Created your own thread.

 

Welcome to AAC!

You need to be more specific in your requirements:

What is your 4v DC source? Mains, LiPo battery?
What current capability do you need at 2v?
How accurate do you need the 2v to be? "Approx" isn't sufficient...
How stable is the output requirement from no-load to full-load? 0.1% change, 1%, 5%, 10%?
What is "very low"? 100uA?

Is this a 1-off requirement, or a product element needing 10s, 100s, or 1000s of them?
Is this a build or buy requirement? Do you want to do the design & build, pay someone to do it for you, or buy something off the shelf?

What's your budget for this?

 

Depending on the current, efficiency, and heat considerations, a simple 3-terminal linear regulator or a DC to DC converter is the answer.

 

Depending on the current, efficiency, and heat considerations, a simple 3-terminal linear regulator or a DC to DC converter is the answer.

Of course, but that's not the point... "depending" is everything

 

Of course, but that's not the point... "depending" is everything

Exactly, we need more information.