LM2675

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

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Hoja de datos

document-pdfAcrobat LM2675 SIMPLE SWITCHER® Power Converter, High-Efficiency, 1A, Step-Down Voltage Regulator datasheet (Rev. G) (Inglés) PDF | HTML

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LM2675

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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 x 9.43

SOIC (D)

8

29.4 mm² 4.9 x 6

WSON (NHN)

16

25 mm² 5 x 5

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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=Principal documentación para este producto seleccionada por TI

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	Tipo	Título		Fecha
*	Data sheet	LM2675 SIMPLE SWITCHER® Power Converter, High-Efficiency, 1A, Step-Down Voltage Regulator datasheet (Rev. G)	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
	EVM User's guide	LM2675 5.0EVAL 1A Step-Down High-Efficiency SIMPLE SWITCHER Eval Brd (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.

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 (...)

Guía del usuario: PDF