1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Adjustable Voltage Regulator

  1. Nov 8, 2009 #1
    Hi Everyone,

    I need to design an adjustable voltage regulator without using an IC. Does anybody could give me a source that can help me?

    Input will vary between 10-15 volts... And output will be adjustable between 4-6 volts.
    Line and Load regulations must be around %1

    Need your help...
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Nov 9, 2009 #2


    User Avatar

    Staff: Mentor

    Welcome to the PF. The easiest way to start would be to look at the equivalent circuit in the LM317 datasheet. That will show you how that adjustable linear voltage regulator IC is put together, and you can do something similar using discrete transistors, etc.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook