LM2679

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具有可調節電流限制功能的 SIMPLE SWITCHER? 8V 至 40V、5A 降壓直流/直流開關穩壓器

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TLVM13660 正在供貨 采用 5mm x 5.5mm 增強型 HotRod? QFN 封裝的 36V 輸入、1V 至 6V 輸出、6A 降壓電源模塊 Save board space, simplify design and speed time to market with an integrated-inductor power module.

產品詳情

Rating Catalog Topology Buck Iout (max) (A) 5 Vin (max) (V) 40 Vin (min) (V) 8 Vout (max) (V) 37 Vout (min) (V) 1.23 Features Adjustable current limit, Frequency synchronization, Over Current Protection Control mode Voltage mode Switching frequency (min) (kHz) 260 Switching frequency (max) (kHz) 260 Operating temperature range (°C) -40 to 125 Iq (typ) (μA) 4200 Duty cycle (max) (%) 91 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 5 Vin (max) (V) 40 Vin (min) (V) 8 Vout (max) (V) 37 Vout (min) (V) 1.23 Features Adjustable current limit, Frequency synchronization, Over Current Protection Control mode Voltage mode Switching frequency (min) (kHz) 260 Switching frequency (max) (kHz) 260 Operating temperature range (°C) -40 to 125 Iq (typ) (μA) 4200 Duty cycle (max) (%) 91 Type Converter
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 92%
  • Simple and Easy to Design Using Off-The-Shelf
    External Components
  • Resistor Programmable Peak Current Limit Over a
    Range of 3 A to 7 A
  • 120-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 92%
  • Simple and Easy to Design Using Off-The-Shelf
    External Components
  • Resistor Programmable Peak Current Limit Over a
    Range of 3 A to 7 A
  • 120-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 LM2679 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 5-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 LM2679 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 LM2679 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 specified to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.

The LM2679 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 5-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 LM2679 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 LM2679 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 specified to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.
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技術文檔

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類型 標題 下載最新的英語版本 日期
* 數據表 LM2679 SIMPLE SWITCHER 5-A Step-Down Voltage Regulator With Adjustable Current Limit 數據表 (Rev. O) PDF | HTML 2016年 6月 29日
應用手冊 半導體和 IC 封裝熱指標 (Rev. D) PDF | HTML 英語版 (Rev.D) PDF | HTML 2024年 4月 24日
技術文章 Quantifying the value of wide VIN PDF | HTML 2016年 6月 15日
技術文章 DC/DC converter datasheets – System losses demystified PDF | HTML 2016年 4月 25日
技術文章 DC/DC converter datasheets – System efficiency demystified PDF | HTML 2016年 4月 18日
應用手冊 Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014年 9月 12日
應用手冊 AN-1187 Leadless Leadframe Package (LLP) (Rev. R) 2013年 5月 7日
EVM 用戶指南 AN-1135 LM267X 3A, 5A Evaluation Boards (Rev. D) 2013年 4月 24日
應用手冊 AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013年 4月 24日
應用手冊 AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013年 4月 23日
應用手冊 AN-1197 Selecting Inductors for Buck Converters (Rev. B) 2013年 4月 23日
應用手冊 AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013年 4月 23日
應用手冊 AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 2013年 4月 23日
應用手冊 AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013年 4月 23日
應用手冊 AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013年 4月 23日
應用手冊 AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013年 4月 23日
應用手冊 AN-1Positive-to-Negative Buck-Boost Converter Using LM267x SIMPLE SWITCHER (Rev. E) 2013年 4月 23日
應用手冊 AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013年 4月 23日
應用手冊 Simple Techniques Minimize Cross-Coupling in Distributed Power Systems 2007年 3月 21日
應用手冊 Input and Output Capacitor Selection 2005年 9月 19日
更多文獻資料 SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005年 7月 12日
應用手冊 AN-643 EMI/RFI Board Design (Rev. B) 2004年 5月 3日

設計和開發

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評估板

LM2679-5.0EVAL — 具有可調節電流限制的 SIMPLE SWITCHER® 5A 降壓電壓穩壓器評估模塊

Simple Switcher 5A Step-Down Voltage Regulator with Adjustable Current Limit

用戶指南: PDF
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仿真模型

LM2679 PSpice Transient Model

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仿真模型

LM2679 Unencrypted PSpice Transient Model

SNVM878.ZIP (2 KB) - PSpice Model
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封裝 引腳 CAD 符號、封裝和 3D 模型
TO-220 (NDZ) 7 Ultra Librarian
TO-263 (KTW) 7 Ultra Librarian
VSON (NHM) 14 Ultra Librarian

訂購和質量

包含信息：
  • RoHS
  • REACH
  • 器件標識
  • 引腳鍍層/焊球材料
  • MSL 等級/回流焊峰值溫度
  • MTBF/時基故障估算
  • 材料成分
  • 鑒定摘要
  • 持續可靠性監測
包含信息：
  • 制造廠地點
  • 封裝廠地點

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