Product details

Vin (Min) (V) 4 Vin (Max) (V) 60 Vout (Min) (V) 3.3 Vout (Max) (V) 37 Iout (Max) (A) 3 Iq (Typ) (uA) 5000 Switching frequency (Min) (kHz) 42 Switching frequency (Max) (kHz) 63 Features Enable, Over Current Protection Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
Vin (Min) (V) 4 Vin (Max) (V) 60 Vout (Min) (V) 3.3 Vout (Max) (V) 37 Iout (Max) (A) 3 Iq (Typ) (uA) 5000 Switching frequency (Min) (kHz) 42 Switching frequency (Max) (kHz) 63 Features Enable, Over Current Protection Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
TO-220 (KC) 5 86 mm² 10.2 x 8.7 TO-220 (NDH) 5 86 mm² 10.16 x 8.47 TO-263 (KTT) 5 155 mm² 10.16 x 15.24
  • Newer products available:
  • 3.3-V, 5-V, 12-V, 15-V, and adjustable output versions
  • Adjustable version output voltage range,1.23 V to 37 V (57 V for HV version) ±4% maximum over line and load conditions
  • Specified 3-A output current
  • Wide input voltage range: 40 V Up to 60 V for HV version
  • Requires only four external components
  • 52-kHz fixed-frequency internal oscillator
  • TTL-shutdown capability, low-power standby mode
  • High efficiency
  • Uses readily available standard inductors
  • Create a custom design using the LMR33630 or LM76003 with the WEBENCH Power Designer
  • Newer products available:
  • 3.3-V, 5-V, 12-V, 15-V, and adjustable output versions
  • Adjustable version output voltage range,1.23 V to 37 V (57 V for HV version) ±4% maximum over line and load conditions
  • Specified 3-A output current
  • Wide input voltage range: 40 V Up to 60 V for HV version
  • Requires only four external components
  • 52-kHz fixed-frequency internal oscillator
  • TTL-shutdown capability, low-power standby mode
  • High efficiency
  • Uses readily available standard inductors
  • Create a custom design using the LMR33630 or LM76003 with the WEBENCH Power Designer

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 new product, LMR33630, offers reduced BOM cost, higher efficiency, and an 85% reduction in solution size among many other features. 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 new product, LMR33630, offers reduced BOM cost, higher efficiency, and an 85% reduction in solution size among many other features. 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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Type Title Date
* Data sheet LM2576xx Series SIMPLE SWITCHER® 3-A Step-Down Voltage Regulator datasheet (Rev. F) 21 Apr 2021
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Application note Switching regulator fundamentals (Rev. C) 05 Feb 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-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 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

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Simulation model

LM2576HV PSpice Transient Model

SNVMB29.ZIP (45 KB) - PSpice Model
Simulation model

LM2576HV Unencrypted PSpice Transient Model

SNVMB30.ZIP (2 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 (KC) 5 View options
TO-220 (NDH) 5 View options

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