Specification	LM2596T-12/LF03

Current - Output	3 A
Function	Step-Down
Mounting Type	Through Hole
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	1.81 mOhm
Package / Case	TO-220-5 Formed Leads
Supplier Device Package	TO-220-5
Synchronous Rectifier	False
Topology	Buck
Voltage - Input (Min) [Min]	4.5 V
Voltage - Output (Min/Fixed)	12 V

LM2596 Series

SIMPLE SWITCHER® 4.5V to 40V, 3A Low Component Count Step-Down Regulator

Part	Voltage - Input (Min) [Min]	Voltage - Output (Min/Fixed)	Number of Outputs	Package / Case	Mounting Type	Topology	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Output Configuration	Function	Output Type	Current - Output	Voltage - Output (Max)	Output Type
Texas Instruments LM2596T-5.0/LF03	4.5 V	5 V	1	TO-220-5 Formed Leads	Through Hole	Buck	-40 °C	125 ¯C	TO-220-5	Positive	Step-Down	1.81 mOhm	3 A
Texas Instruments LM2596SX-5.0/NOPB	4.5 V	5 V	1	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Surface Mount	Buck	-40 °C	125 ¯C	TO-263 (DDPAK-5)	Positive	Step-Down	1.81 mOhm	3 A
Texas Instruments LM2596SX-3.3/NOPB	4.5 V	3.3 V	1	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Surface Mount	Buck	-40 °C	125 ¯C	TO-263 (DDPAK-5)	Positive	Step-Down	1.81 mOhm	3 A
Texas Instruments LM2596T-12/LF03	4.5 V	12 V	1	TO-220-5 Formed Leads	Through Hole	Buck	-40 °C	125 ¯C	TO-220-5	Positive	Step-Down	1.81 mOhm	3 A
Texas Instruments LM2596T-3.3	4.5 V	3.3 V	1	TO-220-5 Formed Leads	Through Hole	Buck	-40 °C	125 ¯C	TO-220-5	Positive	Step-Down	1.81 mOhm	3 A
Texas Instruments LM2596T-3.3/LF03	4.5 V	3.3 V	1	TO-220-5 Formed Leads	Through Hole	Buck	-40 °C	125 ¯C	TO-220-5	Positive	Step-Down	1.81 mOhm	3 A
Texas Instruments LM2596SX-ADJ/NOPB	4.5 V	1.2 V	1	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Surface Mount	Buck	-40 °C	125 ¯C	TO-263 (DDPAK-5)	Positive	Step-Down		3 A	37 V	Adjustable
Texas Instruments LM2596T-ADJ/LB05	4.5 V	1.2 V	1	TO-220-5 Formed Leads	Through Hole	Buck	-40 °C	125 ¯C	TO-220-5	Positive	Step-Down		3 A	37 V	Adjustable
Texas Instruments LM2596S-ADJ/NOPB	4.5 V	1.2 V	1	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Surface Mount	Buck	-40 °C	125 ¯C	TO-263 (DDPAK-5)	Positive	Step-Down		3 A	37 V	Adjustable
Texas Instruments LM2596T-3.3/NOPB	4.5 V	3.3 V	1	TO-220-5 Formed Leads	Through Hole	Buck	-40 °C	125 ¯C	TO-220-5	Positive	Step-Down	1.81 mOhm	3 A

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 5.83
		10	$ 5.24
		45	$ 4.95
		135	$ 4.29
		270	$ 4.07
		540	$ 3.65
		1035	$ 3.08
		2520	$ 2.93
Texas Instruments	TUBE	1	$ 4.01
		100	$ 3.27
		250	$ 2.57
		1000	$ 2.18

Description

General part information

LM2596 Series

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 can 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.

Documents

Technical documentation and resources

TO-220 Leadbend Options

LM2596T-12/LF03

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LM2596T-12/LF03

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Technical Specifications

LM2596 Series

Pricing

Description

LM2596 Series

Documents

TO-220 Leadbend Options

Advantages of leaded packages in robust industrial designs

AN-1082 Adjust or Synchronize LM2586/88 Switching Frequency (Rev. B)

Input and Output Capacitor Selection

AN-643 EMI/RFI Board Design (Rev. B)

How to increase system reliability and simplify design using DC/DC converters

Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)

LM2596 SIMPLE SWITCHER® Power Converter 150-kHz 3-A Step-Down Voltage Regulator datasheet (Rev. G)

AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)

AN-1197 Selecting Inductors for Buck Converters (Rev. B)

Semiconductor and IC Package Thermal Metrics (Rev. D)

AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)

Buck Converters Provide a Battery Charger and System Power

Simple Techniques Minimize Cross-Coupling in Distributed Power Systems

AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)

AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)

AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C)

The importance of accurate switching frequency and current limit when selecting bu

AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)

AN-1081 Low-Cost Low-Parts-Count DC/DC Converter With Multiple Outputs (Rev. B)

AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)

AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)

LM2596 Series