Symbols · LIN REG

Linear voltage regulator

In plain English

What does Linear voltage regulator mean?

A linear regulator controls its pass element to maintain a specified output voltage from a suitable input.

A simple example

A small electronic circuit can receive a regulated supply from a higher DC input through the selected regulator.

Suitable DC inputLinear regulating elementRegulated DC output
Original functional explanation. Arrows show information or energy roles; two-headed arrows identify two-way interfaces. This is not a pinout, certified standards graphic or complete circuit.

What the drawings help you do

Show input supply, regulated output and the regulator’s reference connection. A linear regulator adjusts its conducting element rather than using the same switching arrangement as a switch-mode converter. The input/output difference and load affect heat, which must be assessed for the actual device and installation.

Headroom
The input-to-output voltage difference needed for the selected operating conditions.
Thermal design
The arrangement for managing heat and temperature.

Before using this reference

  • Identify input, output and reference connections.
  • Reference required headroom and output components.
  • Check the selected load and thermal arrangement.
Does unused input voltage disappear without a cost?

No. The voltage difference across the conducting path together with current produces loss. The selected regulator, load and thermal design determine the resulting temperature and permitted operation.

Read the source: Linear voltage regulation

Schematic · LIN REGLinear voltage regulator: original educational illustration
Original educational illustrationNot to scale · See source and graphic notes

A distinction that matters

The input/output voltage difference and load create heat that must be considered.

Sources you can follow

These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.

Linear voltage regulation

Linear voltage regulation: public technical context for the named function. Product and compliance details remain with the publisher.

Texas Instruments · Public reference checked 27 October 2026 · Link only

About this graphic

This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.

SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.

Entry JSON · Entry Markdown · Last editorial update: 27 October 2026

Put the reference into a drawing workflow.

Elora Grid helps electrical teams work with drawings, specifications and equipment information. Explore the drafting workflow or join the early-access waitlist.

Explore drafting