Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I frequently meet the references to voltage-regulators and voltage-controllers. However, looking at the specs I find them to perform the same function. Is there a difference between the two, or regulator/controller can be interchanged?

share|improve this question
Please provide a few particular references (links), which you've come across. Without that, the question is a bit broad and unclear. In practice, "voltage controller" can mean different things in different context. – Nick Alexeev May 27 '14 at 17:47
up vote 5 down vote accepted

A voltage regulator produces a stable output voltage that has small variance over a range of load and input conditions.

A controller is a device that monitors and modifies the state of a dynamical system. A voltage controller could be constructed to track a signal, minimize undesired signal characteristics, or even act as a voltage regulator.

share|improve this answer

In the context of electronics: A complete regulator requires a controller. The figure below shows the block diagram for a simple voltage regulator. Here, the "controller" includes a series power component.

Control reg

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.