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DC/DC 轉換器

LM2676

現行

SIMPLE SWITCHER® 8V 至 40V、3A 低零組件數降壓穩壓器

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產品規格表

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open-in-new 比較替代產品
功能相同，但針腳輸出與所比較的裝置不同。
TLVM13660 現行 採用 5 公釐 x 5.5 公釐增強型 HotRod™ QFN 的 36-V 輸入、1-V 至 6-V 輸出、6- A 降壓電源模組 Newer Module version with better performance
LMR51430 現行 具 40µA IQ 的 SIMPLE SWITCHER® 4.5V 至 36V、3A 同步降壓轉換器 New converter in SOT-23 package
LMQ66430 現行 具有 1.5-µA IQ 的 36-V、3-A 低 EMI 同步降壓轉換器 New converter with low IQ and smaller size
TLVM13630 現行 高密度、3-V 至 36-V 輸入、1-V 至 6-V 輸出、3-A 降壓電源模組 Save board space, simplify design and speed time to market with an integrated-inductor power module.

LM2676

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 40 Vin (min) (V) 8 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) 0.0042 Duty cycle (max) (%) 91
Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 40 Vin (min) (V) 8 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) 0.0042 Duty cycle (max) (%) 91
VSON (NHM) 14 30 mm² (6 mm × 5 mm) TO-263 (KTW) 7 153.924 mm² (10.1 mm × 15.24 mm) TO-220 (NDZ) 7 82.6008 mm² (10.16 mm × 8.13 mm)

The LM2676 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 3A 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 3.3V, 5V, and 12V and an adjustable output version.

The SIMPLE SWITCHER power converter concept provides for a complete design using a minimum number of external components. A high fixed frequency oscillator (260kHz) allows the use of physically smaller sized components. A family of standard inductors for use with the LM2676 are available from several manufacturers to greatly simplify the design process.

The LM2676 series also has built-in thermal shutdown, current limiting, and an ON and OFF control input that can power down the regulator to a low 50µA quiescent current standby condition. The output voltage is specified to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.

The LM2676 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 3A 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 3.3V, 5V, and 12V and an adjustable output version.

The SIMPLE SWITCHER power converter concept provides for a complete design using a minimum number of external components. A high fixed frequency oscillator (260kHz) allows the use of physically smaller sized components. A family of standard inductors for use with the LM2676 are available from several manufacturers to greatly simplify the design process.

The LM2676 series also has built-in thermal shutdown, current limiting, and an ON and OFF control input that can power down the regulator to a low 50µA quiescent current standby condition. The output voltage is specified to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.
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open-in-new 比較替代產品
功能相同，但針腳輸出與所比較的裝置不同。
LMR33630 現行 具超低 EMI 的 SIMPLE SWITCHER® 3.8V 至 36V、3A 同步降壓轉換器 Next-generation 3.8-V to 36-V, 3-A synchronous buck converter with ultra-low EMI.

技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 LM2676 SIMPLE SWITCHER® Power Converter, High Efficiency, 3A, Step-Down Voltage Regulator datasheet (Rev. N) PDF | HTML 2025/6/25
應用說明 Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024/3/25
技術文章 How to increase system reliability and simplify design using DC/DC converters PDF | HTML 2016/6/13
技術文章 The importance of accurate switching frequency and current limit when selecting bu PDF | HTML 2016/4/19
技術文章 Advantages of leaded packages in robust industrial designs PDF | HTML 2016/3/8
應用說明 Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014/9/12
應用說明 AN-1187 Leadless Leadframe Package (LLP) (Rev. R) 2013/5/7
應用說明 AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013/4/24
應用說明 AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013/4/23
應用說明 AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013/4/23
應用說明 AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013/4/23
應用說明 AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013/4/23
應用說明 AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013/4/23
應用說明 AN-1Positive-to-Negative Buck-Boost Converter Using LM267x SIMPLE SWITCHER (Rev. E) 2013/4/23
應用說明 AN-1197 Selecting Inductors for Buck Converters (Rev. B) 2013/4/23
應用說明 AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 2013/4/23
應用說明 AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013/4/23
應用說明 Simple Techniques Minimize Cross-Coupling in Distributed Power Systems 2007/3/21
應用說明 Input and Output Capacitor Selection 2005/9/19
更多文件說明 SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005/7/12
應用說明 AN-643 EMI/RFI Board Design (Rev. B) 2004/5/3

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開發板

LM2676S-ADJEVM — LM2676 降壓轉換器評估模組

LM2676S-ADJEVM 評估模組 (EVM) 是完全組裝且經過測試的電路，用於評估 LM2596 降壓轉換器。此 EVM 可在 8V 至 40V 輸入之間運作，並在 3A 時提供 5V 輸出。
使用指南: PDF
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
VSON (NHM) 14 Ultra Librarian
TO-263 (KTW) 7 Ultra Librarian
TO-220 (NDZ) 7 Ultra Librarian
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