首頁 電源管理 AC/DC & DC/DC converters (integrated FET)
首頁
電源管理
AC/DC & DC/DC converters (integrated FET)

LM2679

現行

具可調式電流限制的 SIMPLE SWITCHER® 8V 至 40V、5A 降壓 DC/DC 切換穩壓器

立即訂購
產品規格表

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
LMR51450 現行 36-V、5-A 同步降壓轉換器 Next-generation synchronous buck converter in ultra-small WSON package.
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 Save board space, simplify design and speed time to market with an integrated-inductor power module.

LM2679

現行
產品規格表 立即訂購

產品詳細資料

Iout (max) (A) 5 Vin (min) (V) 8 Vin (max) (V) 40 Topology Buck Type Converter Switching frequency (min) (kHz) 260 Switching frequency (max) (kHz) 260 Features Adjustable current limit, Frequency synchronization, 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) 5 Vin (min) (V) 8 Vin (max) (V) 40 Topology Buck Type Converter Switching frequency (min) (kHz) 260 Switching frequency (max) (kHz) 260 Features Adjustable current limit, Frequency synchronization, 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
  • 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.
open-in-new 尋找其它 AC/DC & DC/DC converters (integrated FET)
下載 觀看有字幕稿的影片 影片

技術文件

star =TI 所選的此產品重要文件
找不到結果。請清除您的搜尋條件，然後再試一次。
檢視所有 22
類型 標題 日期
* Data sheet LM2679 SIMPLE SWITCHER 5-A Step-Down Voltage Regulator With Adjustable Current Limit datasheet (Rev. O) PDF | HTML 2016年 6月 29日
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024年 3月 25日
Technical article Quantifying the value of wide VIN PDF | HTML 2016年 6月 15日
Technical article DC/DC converter datasheets – System losses demystified PDF | HTML 2016年 4月 25日
Technical article DC/DC converter datasheets – System efficiency demystified PDF | HTML 2016年 4月 18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

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LM2679-5.0EVAL — 具有可調整電流限制的 SIMPLE SWITCHER® 5A 降壓式穩壓器評估模組

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

使用指南: PDF
TI.com 無法提供
模擬型號

LM2679 PSpice Transient Model

SNVM485.ZIP (209 KB) - PSpice Model
下載
模擬型號

LM2679 Unencrypted PSpice Transient Model

SNVM878.ZIP (2 KB) - PSpice Model
下載
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
適用 TI 的評估品項標準條款與條件。

訂購與品質

內含資訊：
  • RoHS
  • REACH
  • 產品標記
  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 資格摘要
  • 進行中可靠性監測
內含資訊：
  • 晶圓廠位置
  • 組裝地點

支援與培訓

內含 TI 工程師技術支援的 TI E2E™ 論壇

以英文檢視所有論壇主題

內容係由 TI 和社群貢獻者依「現狀」提供，且不構成 TI 規範。檢視使用條款。

若有關於品質、封裝或訂購 TI 產品的問題，請參閱 TI 支援。​​​​​​​​​​​​​​

影片