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
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.
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

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
PDIP (P) 8 92.5083 mm² 9.81 x 9.43 SOIC (D) 8 29.4 mm² 4.9 x 6 WSON (NHN) 16 25 mm² 5 x 5
  • 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 Fecha
* Data sheet LM2674 SIMPLE SWITCHER® Power Converter, High-Efficiency, 500mA, Step-Down Voltage Regulator datasheet (Rev. I) PDF | HTML 25 jun 2025
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25 mar 2024
Technical article How to increase system reliability and simplify design using DC/DC converters PDF | HTML 13 jun 2016
Technical article The importance of accurate switching frequency and current limit when selecting bu PDF | HTML 19 abr 2016
Technical article Advantages of leaded packages in robust industrial designs PDF | HTML 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-1187 Leadless Leadframe Package (LLP) (Rev. R) 07 may 2013
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24 abr 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23 abr 2013
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) 23 abr 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23 abr 2013
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 23 abr 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23 abr 2013
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23 abr 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23 abr 2013
Application note AN-1Positive-to-Negative Buck-Boost Converter Using LM267x SIMPLE SWITCHER (Rev. E) 23 abr 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23 abr 2013
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

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

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

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL)/reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

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