ONLM2596 Adjustable Buck Regulator

Overview

The LM2596TVADJG is an adjustable buck (step-down) switching regulator from onsemi that can convert a higher DC input voltage down to a lower, regulated output. It is designed for power-supply applications that need up to 3 A of output current and uses a 150 kHz switching frequency. Engineers commonly use it to build compact, efficient non-isolated DC/DC converters.

Why Choose This Part

This part is a straightforward choice when you need a simple, adjustable step-down regulator with moderate output current. A switching design like this is much more efficient than a linear regulator when the input-to-output voltage difference is large, which helps reduce heat and improve battery life. It is also a familiar building block, so it is easy to integrate into proven power-supply designs.

Applications

Getting Started

For a new design, follow the onsemi reference circuit closely and verify the inductor, diode, output capacitor, and feedback-divider values for your target input and output conditions. A bench prototype is often easiest to validate with a known-good layout, because switch-mode regulators are sensitive to PCB loop area and grounding. If you are designing a module or breakout around this device, use the datasheet's recommended layout and thermal guidance before tuning component values.

LM2596 Family

Comparing specs that differ across variants. The current part is highlighted.

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