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AC/DC 和 DC/DC 转换器（集成 FET）

LM2673

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具有可调节电流限制功能的 8V 至 40V、3A SIMPLE SWITCHER® 降压转换器

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LMQ66430 正在供货 具有 1.5µA IQ 的 36V、3A 低 EMI 同步降压转换器 New converter with low IQ and smaller size
LMR51430 正在供货 具有 40µA IQ 的 SIMPLE SWITCHER® 4.5V 至 36V、3A 同步降压转换器 New converter in SOT-23 package
TLVM13630 正在供货 高密度 3V 至 36V 输入、1V 至 6V 输出、3A 降压电源模块 Save board space, simplify design and speed time to market with an integrated-inductor power module.

LM2673

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米6体育平台手机版_好二三四详情

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 8 Vin (max) (V) 40 Switching frequency (min) (kHz) 260 Switching frequency (max) (kHz) 260 Features Enable, Over Current Protection Control mode Voltage mode Vout (min) (V) 1.23 Vout (max) (V) 37 Iq (typ) (µA) 4200 Duty cycle (max) (%) 91
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 8 Vin (max) (V) 40 Switching frequency (min) (kHz) 260 Switching frequency (max) (kHz) 260 Features Enable, Over Current Protection Control mode Voltage mode Vout (min) (V) 1.23 Vout (max) (V) 37 Iq (typ) (µA) 4200 Duty cycle (max) (%) 91
TO-220 (NDZ) 7 82.6008 mm² 10.16 x 8.13 TO-263 (KTW) 7 153.924 mm² 10.1 x 15.24 VSON (NHM) 14 30 mm² 6 x 5
  • Efficiency Up to 94%
  • Simple and Easy to Design With (Using Off-The-
    Shelf External Components)
  • Resistor Programmable Peak Current Limit Over a
    Range of 2 A to 5 A
  • 150-mΩ DMOS Output Switch
  • 3.3-V, 5-V, 12-V Fixed Output and Adjustable
    (1.2 V to 37 V) Versions
  • ±2% Maximum Output Tolerance Over Full Line
    and Load Conditions
  • Wide Input Voltage Range: 8 V to 40 V
  • 260-KHz Fixed Frequency Internal Oscillator
  • Soft-Start Capability
  • –40 to 125°C Operating Junction Temperature
    Range
  • Efficiency Up to 94%
  • Simple and Easy to Design With (Using Off-The-
    Shelf External Components)
  • Resistor Programmable Peak Current Limit Over a
    Range of 2 A to 5 A
  • 150-mΩ DMOS Output Switch
  • 3.3-V, 5-V, 12-V Fixed Output and Adjustable
    (1.2 V to 37 V) Versions
  • ±2% Maximum Output Tolerance Over Full Line
    and Load Conditions
  • Wide Input Voltage Range: 8 V to 40 V
  • 260-KHz Fixed Frequency Internal Oscillator
  • Soft-Start Capability
  • –40 to 125°C Operating Junction Temperature
    Range

The LM2673 series of regulators are monolithic integrated circuits which provide all of the active functions for a step-down (buck) switching regulator capable of driving up to 3-A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance DMOS power switch. The series consists of fixed output voltages of 3.3 V, 5 V, and 12 V and an adjustable output version.

The SIMPLE SWITCHER® concept provides for a complete design using a minimum number of external components. A high fixed frequency oscillator (260 kHz) allows the use of physically smaller sized components. A family of standard inductors for use with the LM2673 are available from several manufacturers to greatly simplify the design process.

Other features include the ability to reduce the input surge current at power on by adding a soft-start timing capacitor to gradually turn on the regulator. The LM2673 series also has built-in thermal shutdown and resistor programmable current limit of the power MOSFET switch to protect the device and load circuitry under fault conditions. The output voltage is ensured to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.

The LM2673 series of regulators are monolithic integrated circuits which provide all of the active functions for a step-down (buck) switching regulator capable of driving up to 3-A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance DMOS power switch. The series consists of fixed output voltages of 3.3 V, 5 V, and 12 V and an adjustable output version.

The SIMPLE SWITCHER® concept provides for a complete design using a minimum number of external components. A high fixed frequency oscillator (260 kHz) allows the use of physically smaller sized components. A family of standard inductors for use with the LM2673 are available from several manufacturers to greatly simplify the design process.

Other features include the ability to reduce the input surge current at power on by adding a soft-start timing capacitor to gradually turn on the regulator. The LM2673 series also has built-in thermal shutdown and resistor programmable current limit of the power MOSFET switch to protect the device and load circuitry under fault conditions. The output voltage is ensured to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.
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LMR33630 正在供货 具有超低 EMI 的 SIMPLE SWITCHER® 3.8V 至 36V、3A 同步降压转换器 Next-generation 3.8-V to 36-V, 3-A synchronous buck converter with ultra-low EMI.

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 LM2673 SIMPLE SWITCHER® 3-A Step-Down Voltage Regulator With Adjustable Current Limit 数据表 (Rev. O) PDF | HTML 2016年 6月 30日
应用手册 半导体和 IC 封装热指标 (Rev. D) PDF | HTML 英语版 (Rev.D) PDF | HTML 2024年 4月 24日
技术文章 DC/DC converter datasheets - Calculate system losses PDF | HTML 2016年 5月 2日
技术文章 DC/DC converter datasheets – System losses demystified PDF | HTML 2016年 4月 25日
技术文章 DC/DC converter datasheets – System efficiency demystified PDF | HTML 2016年 4月 18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
EVM 用户指南 AN-1135 LM267X 3A, 5A Evaluation Boards (Rev. D) 2013年 4月 24日
应用手册 AN-2162 Simple Success With Conducted EMI From DC-DC Converters (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-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
应用手册 AN-1157 Pos-to-Neg Buck-Boost Converter Using LM267x SIMPLE SWITCHER (cn) 2004年 5月 1日

设计和开发

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评估板

LM2673-5.0EVAL — 具有可调节电流限制的 SIMPLE SWITCHER® 3A 降压电压稳压器评估模块

Simple Switcher 3A Step-Down Voltage Regulatory with Adjustable Current Limit

用户指南: PDF
TI.com 上无现货
仿真模型

LM2673 TINA-TI Load Transient Reference Design (Rev. A)

SNVM513A.TSC (99 KB) - TINA-TI Reference Design
下载
仿真模型

LM2673 TINA-TI TRANSIENT SPICE MODEL (Rev. A)

SNVM512A.ZIP (13 KB) - TINA-TI Spice Model
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仿真模型

LM2673 TINA-TI start-up Transient Reference Design (Rev. A)

SNVM514A.TSC (139 KB) - TINA-TI Reference Design
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仿真模型

LM2673 Unencrypted PSpice Transient Model Package (Rev. B)

SNVM486B.ZIP (215 KB) - PSpice Model
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封装 引脚 CAD 符号、封装和 3D 模型
TO-220 (NDZ) 7 Ultra Librarian
TO-263 (KTW) 7 Ultra Librarian
VSON (NHM) 14 Ultra Librarian
应遵守 TI 评估类商品的标准条款与条件。

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

支持和培训

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