Product details

Vin (Min) (V) 4.5 Vin (Max) (V) 40 Vout (Min) (V) 3.3 Vout (Max) (V) 37 Iout (Max) (A) 3 Iq (Typ) (uA) 5000 Switching frequency (Min) (kHz) 110 Switching frequency (Max) (kHz) 173 Features Enable, Over Current Protection Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
Vin (Min) (V) 4.5 Vin (Max) (V) 40 Vout (Min) (V) 3.3 Vout (Max) (V) 37 Iout (Max) (A) 3 Iq (Typ) (uA) 5000 Switching frequency (Min) (kHz) 110 Switching frequency (Max) (kHz) 173 Features Enable, Over Current Protection Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
TO-220 (NDH) 5 86 mm² 10.16 x 8.47 TO-263 (KTT) 5 155 mm² 10.16 x 15.24
  • New product available: LMR33630 36-V, 3-A, 400-kHz synchronous converter
  • 3.3-V, 5-V, 12-V, and adjustable output versions
  • Adjustable version output voltage range: 1.2-V to 37-V ±4% maximum over line and load conditions
  • Available in TO-220 and TO-263 packages
  • 3-A output load current
  • Input voltage range up to 40 V
  • Requires only four external components
  • Excellent line and load regulation specifications
  • 150-kHz Fixed-frequency internal oscillator
  • TTL shutdown capability
  • Low power standby mode, IQ, typically 80 µA
  • High efficiency
  • Uses readily available standard inductors
  • Thermal shutdown and current-limit protection
  • Create a custom design using the LM2596 with the WEBENCH Power Designer
  • New product available: LMR33630 36-V, 3-A, 400-kHz synchronous converter
  • 3.3-V, 5-V, 12-V, and adjustable output versions
  • Adjustable version output voltage range: 1.2-V to 37-V ±4% maximum over line and load conditions
  • Available in TO-220 and TO-263 packages
  • 3-A output load current
  • Input voltage range up to 40 V
  • Requires only four external components
  • Excellent line and load regulation specifications
  • 150-kHz Fixed-frequency internal oscillator
  • TTL shutdown capability
  • Low power standby mode, IQ, typically 80 µA
  • High efficiency
  • Uses readily available standard inductors
  • Thermal shutdown and current-limit protection
  • Create a custom design using the LM2596 with the WEBENCH Power Designer

The LM2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 3-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, and a fixed-frequency oscillator.

The LM2596 series operates at a switching frequency of 150 kHz, thus allowing smaller sized filter components than what would be required with lower frequency switching regulators. Available in a standard 5-pin TO-220 package with several different lead bend options, and a 5-pin TO-263 surface mount package.

The new product, LMR33630, offers reduced BOM cost, higher efficiency, and an 85% reduction in solution size among many other features. Start WEBENCH Design with the LMR33630.

The LM2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 3-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, and a fixed-frequency oscillator.

The LM2596 series operates at a switching frequency of 150 kHz, thus allowing smaller sized filter components than what would be required with lower frequency switching regulators. Available in a standard 5-pin TO-220 package with several different lead bend options, and a 5-pin TO-263 surface mount package.

The new product, LMR33630, offers reduced BOM cost, higher efficiency, and an 85% reduction in solution size among many other features. Start WEBENCH Design with the LMR33630.

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LMR33630 ACTIVE SIMPLE SWITCHER® 3.8V to 36V, 3A Synchronous Buck Converter With Ultra-Low EMI Next-generation 3.8-V to 36-V, 3-A synchronous buck converter with ultra-low EMI.

Technical documentation

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Type Title Date
* Data sheet LM2596 SIMPLE SWITCHER® Power Converter 150-kHz 3-A Step-Down Voltage Regulator datasheet (Rev. F) 05 Apr 2021
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Technical article How to increase system reliability and simplify design using DC/DC converters 13 Jun 2016
Technical article The importance of accurate switching frequency and current limit when selecting buck regulators 19 Apr 2016
Application note Semiconductor and IC Package Thermal Metrics (Rev. C) 19 Apr 2016
Technical article Advantages of leaded packages in robust industrial designs 08 Mar 2016
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 12 Sep 2014
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24 Apr 2013
Application note AN-1081 Low-Cost Low-Parts-Count DC/DC Converter With Multiple Outputs (Rev. B) 23 Apr 2013
Application note AN-1082 Adjust or Synchronize LM2586/88 Switching Frequency (Rev. B) 23 Apr 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23 Apr 2013
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) 23 Apr 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23 Apr 2013
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 23 Apr 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23 Apr 2013
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23 Apr 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23 Apr 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23 Apr 2013
Application note Buck Converters Provide a Battery Charger and System Power 21 Mar 2007
Application note Simple Techniques Minimize Cross-Coupling in Distributed Power Systems 21 Mar 2007
Application note Input and Output Capacitor Selection 19 Sep 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12 Jul 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) 03 May 2004

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LM2596S-ADJEVM — LM2596 Step-Down Converter Evaluation Module

The LM2596S-ADJEVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM2596 step-down converter. The EVM operates from an 7V to 40V input and provides a 5V output at 3A.
In stock
Limit: 5
Simulation model

LM2596 5P0 PSpice Transient Model

SNVMA61.ZIP (72 KB) - PSpice Model
Simulation model

LM2596 5P0 Unencrypted PSpice Transient Model

SNVMA62.ZIP (2 KB) - PSpice Model
Simulation model

LM2596_12P0 Unencrypted PSpice Transient Model

SNVMA63.ZIP (2 KB) - PSpice Model
Simulation model

LM2596_12P0 PSpice Transient Model

SNVMA64.ZIP (70 KB) - PSpice Model
Simulation model

LM2596_3P3 Unencrypted PSpice Transient Model

SNVMA65.ZIP (2 KB) - PSpice Model
Simulation model

LM2596_3P3 PSpice Transient Model

SNVMA66.ZIP (77 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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(NEB) 5 View options
DDPAK/TO-263 (KTT) 5 View options
TO-220 (NDH) 5 View options

Ordering & quality

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