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LM2596 Adjustable Buck Regulator

ONLM2596 Adjustable Buck Regulator

MPN: LM2596DSADJG
onsemi
Switching Voltage Regulators 3A BUCK SWCH 150KHZ
14,989 in stock
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Overview

The LM2596DSADJG from onsemi is a fixed-frequency switching buck regulator intended to step a higher DC input down to a lower DC output. It integrates the power switch control needed to build a compact, efficient point-of-load supply. The adjustable output version is useful when one design needs to support different rail voltages with the same regulator family.

Why Choose This Part

This part is attractive when you need a simple, proven buck regulator with a 3 A-class output capability and fixed 150 kHz switching. The adjustable output makes it flexible for multiple rail voltages without changing the controller IC. Compared with linear regulation, it can greatly reduce power dissipation when the input-to-output voltage difference is large.

Applications

Point-of-load DC-DC conversion
Generate local lower-voltage rails from a higher upstream supply in embedded systems and control boards.
Distributed power in industrial equipment
Create efficient intermediate or secondary rails for logic, sensors, and interface circuitry.
Battery-fed subsystems
Step battery or adapter voltage down to the voltage required by downstream electronics.
Prototyping and bench supply modules
Common choice for compact regulator daughtercards and prototype power stages.
General-purpose embedded power rails
Support MCU, interface, and peripheral rails where a switching regulator is preferred over a linear regulator.

Getting Started

For first bring-up, follow the onsemi reference design closely and use the recommended inductor, diode, and output capacitor values from the datasheet. Layout matters a lot with buck regulators: keep the switch node, diode, input capacitor, and ground return loops tight and compact. A lab supply, current limit, and an oscilloscope are useful for verifying startup, ripple, and load-step behavior.

Part of LM2596 Switching Regulators family » LM2596

LM2596 Family

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

Part Number Output Type Output V Stock
LM2596DSADJG (this part) — — 14,989
LM2596S-ADJ-EV (EVVO) Adjustable 1.2V 694
LM2596SX-12/NOPB (Texas Instruments) Fixed 12V 1,607
Also available as: LM2596TVADJG, LM2596

Also Consider

LM2596 Adjustable Buck Regulator TITexas Instruments - A very common adjustable-output alternative in the same general regulator class with broad availability.
MP1584 Buck Regulator Monolithic Power Systems - Good for small, efficient point-of-load converters where a compact switching regulator is preferred.