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LM2675

正在供货

元件数量较少的 SIMPLE SWITCHER® 6.5V 至 40V、1A 降压稳压器

可提供此产品的更新版本

open-in-new 比较替代产品
功能与比较器件相同但引脚有所不同
全新 LMR43610 正在供货 具有低 IQ 的 3V 至 36V、1A、低 EMI 同步降压稳压器 New converter with low IQ and smaller size
LMR54410 正在供货 具有 80µA IQ 的 4.5V 至 36V、1A 同步降压 SIMPLE SWITCHER® 电源转换器 Newer converter with better feature set
LMZM23601 正在供货 采用 3.8mm × 3mm 封装的 36V、1A 降压直流/直流电源模块 Small solution size module
TLVM13620 正在供货 采用 4mm x 6mm x 1.8mm 封装的 3.6V 至 36V 输入、1V 至 6V 输出、2A 降压模块 Save board space, simplify design and speed time to market with an integrated-inductor power module.
TPSM33615 正在供货 3-36V 输入 1-15V 输出 1.5A 同步降压电源模块 Smaller design with an integrated-inductor power module.

产品详情

Vin (min) (V) 6.5 Vin (max) (V) 40 Vout (min) (V) 1.23 Vout (max) (V) 37 Iout (max) (A) 1 Iq (typ) (mA) 2.5 Switching frequency (min) (kHz) 260 Switching frequency (max) (kHz) 260 Features Enable, Over Current Protection Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 1 Control mode Voltage mode Duty cycle (max) (%) 95 Type Converter
Vin (min) (V) 6.5 Vin (max) (V) 40 Vout (min) (V) 1.23 Vout (max) (V) 37 Iout (max) (A) 1 Iq (typ) (mA) 2.5 Switching frequency (min) (kHz) 260 Switching frequency (max) (kHz) 260 Features Enable, Over Current Protection Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 1 Control mode Voltage mode Duty cycle (max) (%) 95 Type Converter
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
  • 3.3-V, 5-V, 12-V, and Adjustable Output Versions
  • Adjustable Version Output Voltage Range: 1.21 V
    to 37 V
  • ±1.5% Maximum Output Voltage Tolerance Over
    Line and Load Conditions
  • Ensured 1-A Output Load Current
  • Wide Input Voltage Range: 8 V to 40 V
  • 260-kHz Fixed Frequency Internal Oscillator
  • TTL Shutdown Capability, Low-Power Standby
    Mode
  • Thermal Shutdown and Current Limit Protection
  • Efficiency up to 96%
  • Available in 8-Pin SOIC, PDIP, and 16-Pin WSON
    Package
  • Requires only 5 External Components
  • 3.3-V, 5-V, 12-V, and Adjustable Output Versions
  • Adjustable Version Output Voltage Range: 1.21 V
    to 37 V
  • ±1.5% Maximum Output Voltage Tolerance Over
    Line and Load Conditions
  • Ensured 1-A Output Load Current
  • Wide Input Voltage Range: 8 V to 40 V
  • 260-kHz Fixed Frequency Internal Oscillator
  • TTL Shutdown Capability, Low-Power Standby
    Mode
  • Thermal Shutdown and Current Limit Protection

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 1-A load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, 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 260 kHz, thus allowing smaller-sized filter components than what would be needed with lower frequency switching regulators. Because of its 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 50-µA standby 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 1-A load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, 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 260 kHz, thus allowing smaller-sized filter components than what would be needed with lower frequency switching regulators. Because of its 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 50-µA standby current. The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions.

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技术文档

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类型 标题 下载最新的英语版本 日期
* 数据表 LM2675 SIMPLE SWITCHER® Power Converter High Efficiency 1-A Step-Down Voltage Regulator 数据表 (Rev. F) PDF | HTML 2016年 6月 29日
应用手册 Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024年 3月 25日
技术文章 How to increase system reliability and simplify design using DC/DC converters PDF | HTML 2016年 6月 13日
技术文章 The importance of accurate switching frequency and current limit when selecting bu PDF | HTML 2016年 4月 19日
技术文章 Advantages of leaded packages in robust industrial designs PDF | HTML 2016年 3月 8日
应用手册 Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014年 9月 12日
应用手册 AN-1187 Leadless Leadframe Package (LLP) (Rev. R) 2013年 5月 7日
应用手册 AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013年 4月 24日
用户指南 LM2675 5.0EVAL 1A Step-Down High-Efficiency SIMPLE SWITCHER Eval Brd (Rev. C) 2013年 4月 24日
应用手册 AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013年 4月 23日
应用手册 AN-1197 Selecting Inductors for Buck Converters (Rev. B) 2013年 4月 23日
应用手册 AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013年 4月 23日
应用手册 AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 2013年 4月 23日
应用手册 AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013年 4月 23日
应用手册 AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013年 4月 23日
应用手册 AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013年 4月 23日
应用手册 AN-1Positive-to-Negative Buck-Boost Converter Using LM267x SIMPLE SWITCHER (Rev. E) 2013年 4月 23日
应用手册 AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013年 4月 23日
应用手册 Simple Techniques Minimize Cross-Coupling in Distributed Power Systems 2007年 3月 21日
应用手册 Input and Output Capacitor Selection 2005年 9月 19日
更多文献资料 SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005年 7月 12日
应用手册 AN-643 EMI/RFI Board Design (Rev. B) 2004年 5月 3日

设计和开发

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评估板

LM2675-5.0EVAL — SIMPLE SWITCHER 电源转换器高效 1A 降压电压稳压器评估模块

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 (...)

用户指南: PDF
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仿真模型

LM2675-ADJ PSpice Transient Model

SNVM533.ZIP (226 KB) - PSpice Model
仿真模型

LM2675-ADJ TINA-TI Load Transient Reference Design

SNVMAT3.TSC (776 KB) - TINA-TI Reference Design
仿真模型

LM2675-ADJ TINA-TI Startup Reference Design

SNVMAT4.TSC (782 KB) - TINA-TI Reference Design
仿真模型

LM2675-ADJ TINA-TI Transient Spice Model

SNVMAT5.ZIP (57 KB) - TINA-TI Spice Model
仿真模型

LM2675-ADJ Unencrypted PSpice Transient Model

SNVM876.ZIP (2 KB) - PSpice Model
模拟工具

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封装 引脚 下载
PDIP (P) 8 查看选项
SOIC (D) 8 查看选项
WSON (NHN) 16 查看选项

订购和质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息:
  • 制造厂地点
  • 封装厂地点

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