TILM2596S-ADJ/NOPB

Overview

The LM2596S-ADJ/NOPB is a classic adjustable step-down (buck) regulator from Texas Instruments rated for up to 3 A output in a through-hole package. It accepts a wide input range (shown by distributors as 4.5 V to 40 V) and provides an adjustable output down to around 1.2 V. The device is a non-synchronous regulator, so it uses an external catch diode and typically runs with lower efficiency than modern synchronous converters. Its through-hole package and simple external component set make it popular for repairs, prototyping, and legacy designs.

Why Choose This Part

Choose the LM2596S-ADJ for a low-cost, well-documented, easy-to-build buck regulator that can deliver up to 3 A with a minimal external component count. The through-hole package is convenient for prototyping and repairs, and the wide input range covers many common input rails. Note that it is non-synchronous, so it requires an external catch diode and will generally be less efficient and run hotter than comparable synchronous buck converters.

Applications

Getting Started

Read the LM2596 datasheet and follow the reference-design component values and layout guidance for inductor, diode, and input/output capacitors. Use a heatsink or adequate copper area when running near 3 A, and verify ripple and thermal performance with an oscilloscope and temperature probe. For prototyping, assemble on a PCB or proto-board rather than relying on loose breadboard wiring for high-current paths.

LM2596 Family

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

Also Consider