Inicio Administración de potencia Reguladores conmutados CC/CC Convertidores de CC/CC
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Administración de potencia
Reguladores conmutados CC/CC
Convertidores de CC/CC

LM2674

ACTIVO

Regulador reductor SIMPLE SWITCHER® de 40 V, 500 mA y bajo número de componentes

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Misma funcionalidad con diferente configuración de pines que el dispositivo comparado
LMZM23600 ACTIVO Módulo de alimentación CC/CC reductor de 36 V y 0,5 A en un paquete de 3,8 mm × 3 mm Small solution size module
LMR54406 ACTIVO Convertidor de potencia bucksincrónico SIMPLE SWITCHER® de 4 V a 36 V, 0.6 A e IQ de 80 µA Next-generation converter with lower IQ and improved feature set.

LM2674

ACTIVO
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Detalles del producto

Rating Catalog Topology Buck Iout (max) (A) 0.5 Vin (max) (V) 40 Vin (min) (V) 6.5 Vout (max) (V) 37 Vout (min) (V) 1.23 Features Enable, Overcurrent protection Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0025 Duty cycle (max) (%) 95
Rating Catalog Topology Buck Iout (max) (A) 0.5 Vin (max) (V) 40 Vin (min) (V) 6.5 Vout (max) (V) 37 Vout (min) (V) 1.23 Features Enable, Overcurrent protection Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0025 Duty cycle (max) (%) 95
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) PDIP (P) 8 92.5083 mm² (9.81 mm × 9.43 mm) WSON (NHN) 16 25 mm² (5 mm × 5 mm)
  • New product available:
  • For faster time to market:
  • Efficiency up to 96%
  • Available in 8-pin SOIC, PDIP, and 16-pin WSON packages
  • Simple and easy to design with
  • Requires only five external components
  • Uses readily available standard inductors
  • 3V, 5V, 12V, and adjustable output versions
  • 1.21V to 37V adjustable version output voltage range
  • ±1.5% maximum output voltage tolerance over line and load conditions
  • Specified 500mA output load current
  • 0.25Ω DMOS output switch
  • 8V to 40V wide input voltage range
  • 260kHz fixed frequency internal oscillator
  • TTL shutdown capability, low power standby mode
  • Thermal shutdown and current limit protection
  • Create a custom design using the LM2674 with the WEBENCH® Power Designer
  • New product available:
  • For faster time to market:
  • Efficiency up to 96%
  • Available in 8-pin SOIC, PDIP, and 16-pin WSON packages
  • Simple and easy to design with
  • Requires only five external components
  • Uses readily available standard inductors
  • 3V, 5V, 12V, and adjustable output versions
  • 1.21V to 37V adjustable version output voltage range
  • ±1.5% maximum output voltage tolerance over line and load conditions
  • Specified 500mA output load current
  • 0.25Ω DMOS output switch
  • 8V to 40V wide input voltage range
  • 260kHz fixed frequency internal oscillator
  • TTL shutdown capability, low power standby mode
  • Thermal shutdown and current limit protection
  • Create a custom design using the LM2674 with the WEBENCH® Power Designer

The LM2674 series of regulators are monolithic integrated circuits built with a LMDMOS process. These regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 500mA load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable output version.

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

The LM2674 series operates at a switching frequency of 260kHz, thus allowing smaller sized filter components than what is required with lower frequency switching regulators. Because of very high efficiency (> 90%), the copper traces on the printed-circuit board are the only heat sinking required.

A family of standard inductors for use with the LM2674 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies using these advanced ICs. Also included in the data sheet are selector guides for diodes and capacitors designed to work in switch-mode power supplies.

Other features include a specified ±1.5% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring typically 50µA standby current. The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions.

The LM2674 series of regulators are monolithic integrated circuits built with a LMDMOS process. These regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 500mA load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable output version.

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

The LM2674 series operates at a switching frequency of 260kHz, thus allowing smaller sized filter components than what is required with lower frequency switching regulators. Because of very high efficiency (> 90%), the copper traces on the printed-circuit board are the only heat sinking required.

A family of standard inductors for use with the LM2674 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies using these advanced ICs. Also included in the data sheet are selector guides for diodes and capacitors designed to work in switch-mode power supplies.

Other features include a specified ±1.5% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring typically 50µA standby current. The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LM2674 SIMPLE SWITCHER® Power Converter, High-Efficiency, 500mA, Step-Down Voltage Regulator datasheet (Rev. I) PDF | HTML 25/06/2025
Nota sobre la aplicación Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25/03/2024
Artículo técnico How to increase system reliability and simplify design using DC/DC converters PDF | HTML 13/06/2016
Artículo técnico The importance of accurate switching frequency and current limit when selecting bu PDF | HTML 19/04/2016
Artículo técnico Advantages of leaded packages in robust industrial designs PDF | HTML 8/03/2016
Nota sobre la aplicación Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 12/09/2014
Nota sobre la aplicación AN-1187 Leadless Leadframe Package (LLP) (Rev. R) 7/05/2013
Nota sobre la aplicación AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24/04/2013
Nota sobre la aplicación AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23/04/2013
Nota sobre la aplicación AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23/04/2013
Nota sobre la aplicación AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23/04/2013
Nota sobre la aplicación AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23/04/2013
Nota sobre la aplicación AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23/04/2013
Nota sobre la aplicación AN-1Positive-to-Negative Buck-Boost Converter Using LM267x SIMPLE SWITCHER (Rev. E) 23/04/2013
Nota sobre la aplicación AN-1197 Selecting Inductors for Buck Converters (Rev. B) 23/04/2013
Nota sobre la aplicación AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 23/04/2013
Nota sobre la aplicación AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23/04/2013
Nota sobre la aplicación Simple Techniques Minimize Cross-Coupling in Distributed Power Systems 21/03/2007
Nota sobre la aplicación Input and Output Capacitor Selection 19/09/2005
Más documentación SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12/07/2005
Nota sobre la aplicación AN-643 EMI/RFI Board Design (Rev. B) 3/05/2004

Diseño y desarrollo

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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
SOIC (D) 8 Ultra Librarian
PDIP (P) 8 Ultra Librarian
WSON (NHN) 16 Ultra Librarian
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