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3 A adjustable positive regulator

LM350 Working Principle

Learn how LM350 works with an illustrated explanation and practical readings.

LM350 at a glance

Follow the labeled connections and functional stages

LM350 working principle: illustrated functional stages, basic circuit and connections
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How it works

3 stages · Explore one step at a time

Step 1 / 3

Establish the reference

The regulator controls OUTPUT relative to ADJUST, not directly relative to ground.

Step 2 / 3

Choose the resistor ratio

Connect 110 Ω from OUT to ADJ and 330 Ω from ADJ to the return. The nominal ratio is three to one.

Step 3 / 3

Check current and heat

The divider draws about 11.36 mA. Add the load current before calculating pass-stage dissipation and selecting cooling.

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