Skip to datasheet
3 A adjustable positive regulator

LM350 Internal Circuitry

Explore the internal circuitry and functional stages of LM350.

Inside LM350

A compact floating reference and pass-control loop inside the package.

LM350 TO-220 cutaway with error amplifier,1.25V floating reference, series pass stage and current/thermal/safe-area protection. Leads ADJ1 OUT2 IN3.
Functional architecture; the loop regulates OUTPUT minus ADJUST.

Explore the circuit

Select a stage to see its role and connections

Compare OUT and ADJ

The reference establishes approximately 1.25 V between these terminals.

Control the pass stage

An error amplifier adjusts current from INPUT to OUTPUT.

Limit abnormal stress

Current limiting, thermal protection and safe-area control constrain the pass stage.

Component view