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150 kHz buck regulator

LM2596 Internal Circuitry

Explore the internal circuitry and functional stages of LM2596.

Package view

Inside LM2596

Switching control drawn inside the five-pin package.

LM2596 cutaway with voltage reference, error amplifier, oscillator and PWM, power switch, current limit and thermal shutdown. All five pins are labeled.
Functional organization, not the physical placement of silicon blocks.

Explore the circuit

Select a stage to see its role and connections

Reference and feedback

An internal divider scales the fixed 5 V output sensed at pin 4 for comparison with the reference.

Pulse-width control

The error signal and oscillator control the power-switch pulse width.

Power and protection

The switch feeds pin 2. Current and temperature protections supervise operation.

Component view