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LM2596S-ADJ/NOPB

TILM2596S-ADJ/NOPB

Texas Instruments
Buck Switching Regulator IC Positive Adjustable 1.2V 1 Output 3A TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Active6,638 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The LM2596S-ADJ/NOPB is a monolithic step-down switching voltage regulator capable of driving a 3A load with excellent line and load regulation. It operates at a fixed switching frequency of 150 kHz, allowing the use of smaller external filter components than lower-frequency regulators. This adjustable version provides an output voltage range from 1.2V to 37V and is housed in a 5-pin TO-263 surface-mount package.

Why Choose This Part

The device simplifies power supply design by requiring only four external components and featuring internal frequency compensation. It includes robust protection features such as thermal shutdown and cycle-by-cycle current limiting, while the 80uA standby current in shutdown mode extends battery life in portable applications.

Applications

High-Efficiency Step-Down Buck Regulator
Primary power conversion stage for converting 12V or 24V industrial rails down to logic-level voltages.
On-Card Switching Regulators
Used as a localized power supply on dense PCBs where linear regulators would generate excessive heat.
Battery Charger Circuits
Adjustable output current and voltage capabilities make it suitable for simple constant-voltage charging applications.
Pre-Regulator for Linear Regulators
Efficiently drops high input voltages to an intermediate level to improve the efficiency of downstream LDOs.

Key Specifications

Function Step-Down
Topology Buck
Output Type Adjustable
Mounting Type Surface Mount
Package / Case TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Current - Output 3A
Number of Outputs 1
Output Configuration Positive
Frequency - Switching 150kHz
Operating Temperature -40degC ~ 125degC (TJ)
Synchronous Rectifier No
Voltage - Input (Max) 40V
Voltage - Input (Min) 4.5V
Voltage - Output (Max) 37V
Supplier Device Package TO-263 (DDPAK-5)
Voltage - Output (Min/Fixed) 1.2V

Getting Started

To design with this part, calculate the required inductor and capacitor values based on the maximum input voltage and desired output current as specified in the TI datasheet. Ensure the TO-263 package has adequate copper pour area on the PCB for thermal dissipation, as the tab is the primary heat path. For rapid prototyping, many third-party evaluation modules are available that use this common footprint.

Part of LM2596 / LM2576 Switching Regulator family » LM2596S

LM2596S Family

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

Part Number Output Type Output V Stock
LM2596S-ADJ/NOPB (this part) Adjustable 1.2V 6,638
LM2596S-3.3/NOPB Fixed 3.3V 646
LM2596S-5.0/NOPB Fixed 5V 8,555
Also available as: LM2596S-ADJEVM, LM2596S-ADJ, LM2596S-5.0

Also Consider

LM2576S-ADJ/NOPB TITexas Instruments - Lower 52 kHz switching frequency alternative for applications where EMI at higher frequencies is a concern.
LMR14030SDDAR TITexas Instruments - A more modern synchronous buck regulator with higher efficiency and a smaller SO-8 footprint for space-constrained designs.
LM2596T-ADJ/NOPB TITexas Instruments - The TO-220 through-hole version of this regulator, better suited for mounting to external heatsinks.

Categories

Power Management > Switching Regulators