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LM2576HV

ACTIVE

SIMPLE SWITCHER® 4V to 60V, 3A Low Component Count Step-Down Regulator

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Data sheet

LM2576HV

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 60 Vin (min) (V) 4 Vout (max) (V) 37 Vout (min) (V) 3.3 Features Enable, Over Current Protection Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.005 Duty cycle (max) (%) 98
Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 60 Vin (min) (V) 4 Vout (max) (V) 37 Vout (min) (V) 3.3 Features Enable, Over Current Protection Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.005 Duty cycle (max) (%) 98
TO-263 (KTT) 5 154.8384 mm² (10.16 mm × 15.24 mm) TO-220 (KC) 5 45.212 mm² (10.16 mm × 4.45 mm) TO-220 (NDH) 5 86.0552 mm² (10.16 mm × 8.47 mm) TO-220 (NEB) 5 46.4312 mm² (10.16 mm × 4.57 mm)

The LM2576 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving 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, 15 V, and an adjustable output version.

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

The LM2576 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in some cases no heat sink is required.

A standard series of inductors optimized for use with the LM2576 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50-µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

The LM76003 requires very few external components and has a pinout designed for simple, optimum PCB layout for EMI and thermal performance. See the device comparison table to compare specs.

The LM2576 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving 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, 15 V, and an adjustable output version.

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

The LM2576 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in some cases no heat sink is required.

A standard series of inductors optimized for use with the LM2576 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50-µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

The LM76003 requires very few external components and has a pinout designed for simple, optimum PCB layout for EMI and thermal performance. See the device comparison table to compare specs.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet LM2576xx Series SIMPLE SWITCHER Power Converter 3-A Step-Down Voltage Regulator datasheet (Rev. G) PDF | HTML Mar 22, 2023
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML Mar 25, 2024
Application note Switching regulator fundamentals (Rev. C) PDF | HTML Feb 5, 2019
Technical article How to increase system reliability and simplify design using DC/DC converters PDF | HTML Jun 13, 2016
Technical article The importance of accurate switching frequency and current limit when selecting bu PDF | HTML Apr 19, 2016
Technical article Advantages of leaded packages in robust industrial designs PDF | HTML Mar 8, 2016
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) Sep 12, 2014
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) Apr 24, 2013
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) Apr 23, 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) Apr 23, 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) Apr 23, 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) Apr 23, 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) Apr 23, 2013
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) Apr 23, 2013
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) Apr 23, 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) Apr 23, 2013
Application note Input and Output Capacitor Selection Sep 19, 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations Jul 12, 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) May 3, 2004

Design & development

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

Simulation model

LM2576HV PSpice Transient Model

SNVMB29.ZIP (45 KB) - PSpice model
Supported products & hardware
Simulation model

LM2576HV Unencrypted PSpice Transient Model

SNVMB30.ZIP (2 KB) - PSpice model
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
TO-263 (KTT) 5 Ultra Librarian
TO-220 (KC) 5 Ultra Librarian
TO-220 (NDH) 5 Ultra Librarian
TO-220 (NEB) 5 Ultra Librarian
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