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

LM2675

ACTIVO

Regulador reductor SIMPLE SWITCHER® de 6.5 V a 40 V, 1 A y bajo número de componentes

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LM2675

ACTIVO
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Detalles del producto

Rating Catalog Topology Buck Iout (max) (A) 1 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) 1 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 mm × 9.43 mm) WSON (NHN) 16 25 mm² (5 mm × 5 mm) SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • Efficiency up to 96%
  • Available in 8-pin SOIC, PDIP, and 16-pin WSON package
  • Requires only 5 external components
  • 3.3V, 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 1A output load current
  • 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 LM2675 with the WEBENCH® Power Designer
  • Efficiency up to 96%
  • Available in 8-pin SOIC, PDIP, and 16-pin WSON package
  • Requires only 5 external components
  • 3.3V, 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 1A output load current
  • 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 LM2675 with the WEBENCH® Power Designer

The LM2675 series of regulators are monolithic integrated DC-DC converter circuits built with a LMDMOS process. These regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A 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 LM2675 series operates at a switching frequency of 260kHz, thus allowing smaller-sized filter components than what is needed with lower frequency switching regulators. Because of the very high efficiency (> 90%), the copper traces on the printed-circuit board are the only heat sinking needed.

A family of standard inductors for use with the LM2675 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 ±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 stand-by current. The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions.

The LM2675 series of regulators are monolithic integrated DC-DC converter circuits built with a LMDMOS process. These regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A 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 LM2675 series operates at a switching frequency of 260kHz, thus allowing smaller-sized filter components than what is needed with lower frequency switching regulators. Because of the very high efficiency (> 90%), the copper traces on the printed-circuit board are the only heat sinking needed.

A family of standard inductors for use with the LM2675 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 ±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 stand-by 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 LM2675 SIMPLE SWITCHER® Power Converter, High-Efficiency, 1A, Step-Down Voltage Regulator datasheet (Rev. G) 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
EVM User's guide LM2675 5.0EVAL 1A Step-Down High-Efficiency SIMPLE SWITCHER Eval Brd (Rev. C) 24/04/2013
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

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.

Placa de evaluación

LM2675-5.0EVAL — Convertidor de potencia SIMPLE SWITCHER y módulo de evaluación de regulador de tensión reductor de 1

Amp Step-Down High-Efficency SIMPLE SWITCHER Evaluation Board.

The LM2675 SIMPLE SWITCHER step-down regulator provides all the active functions for a step-down regulator capable of driving a 1A load. Switching frequency is internally set to 260 kHz, allowing smaller-sized filter components than (...)

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