LM2676

現行

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

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同,但引腳輸出與所比較的產品不同
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
LMR51430 現行 具 40-µA IQ 的 SIMPLE SWITCHER® 4.5-V 至 36-V、3-A 同步降壓轉換器 New converter in SOT-23 package
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.
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

產品詳細資料

Iout (max) (A) 3 Vin (min) (V) 8 Vin (max) (V) 40 Topology Buck Type Converter 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 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0042
Iout (max) (A) 3 Vin (min) (V) 8 Vin (max) (V) 40 Topology Buck Type Converter 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 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0042
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

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 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 power converter 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 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 50‑µA quiescent current standby condition. The output voltage is ensured 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 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 power converter 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 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 50‑µA quiescent current standby condition. The output voltage is ensured to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.

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類型 標題 日期
* Data sheet LM2676 SIMPLE SWITCHER® Power Converter, High Efficiency, 3-A, Step-Down Voltage Regulator datasheet (Rev. M) PDF | HTML 2023年 5月 1日
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024年 3月 25日
Technical article How to increase system reliability and simplify design using DC/DC converters PDF | HTML 2016年 6月 13日
Technical article The importance of accurate switching frequency and current limit when selecting bu PDF | HTML 2016年 4月 19日
Technical article Advantages of leaded packages in robust industrial designs PDF | HTML 2016年 3月 8日
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014年 9月 12日
Application note AN-1187 Leadless Leadframe Package (LLP) (Rev. R) 2013年 5月 7日
EVM User's guide AN-1135 LM267X 3A, 5A Evaluation Boards (Rev. D) 2013年 4月 24日
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013年 4月 24日
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013年 4月 23日
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) 2013年 4月 23日
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013年 4月 23日
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 2013年 4月 23日
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013年 4月 23日
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013年 4月 23日
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013年 4月 23日
Application note AN-1Positive-to-Negative Buck-Boost Converter Using LM267x SIMPLE SWITCHER (Rev. E) 2013年 4月 23日
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013年 4月 23日
Application note Simple Techniques Minimize Cross-Coupling in Distributed Power Systems 2007年 3月 21日
Application note Input and Output Capacitor Selection 2005年 9月 19日
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005年 7月 12日
Application note AN-643 EMI/RFI Board Design (Rev. B) 2004年 5月 3日

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開發板

LM2676S-ADJEVM — LM2676 降壓轉換器評估模組

The LM2676S-ADJEVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM2596 step-down converter. The EVM operates from an 8V to 40V input and provides a 5V output at 3A.
使用指南: PDF
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封裝 引腳 下載
TO-220 (NDZ) 7 檢視選項
TO-263 (KTW) 7 檢視選項
VSON (NHM) 14 檢視選項

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