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LM2671MX-ADJ/NOPB

更新时间： 2024-09-29 20:31:11
品牌 Logo 应用领域
美国国家半导体 - NSC 开关光电二极管
页数 文件大小 规格书
24页 432K
描述
IC 1.25 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, PDSO8, 0.150 INCH, PLASTIC, SO-8, Switching Regulator or Controller

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LM2671MX-ADJ/NOPB 技术参数

是否Rohs认证：符合生命周期：Transferred
包装说明：SOP, SOP8,.25Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.09Is Samacsys：N
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：VOLTAGE-MODE
最大输入电压：40 V最小输入电压：6.5 V
标称输入电压：12 VJESD-30 代码：R-PDSO-G8
JESD-609代码：e3长度：4.9 mm
湿度敏感等级：1功能数量：1
端子数量：8最高工作温度：125 °C
最低工作温度：-40 °C最大输出电流：1.25 A
标称输出电压：1.21 V封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装等效代码：SOP8,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1.75 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：BUCK
最大切换频率：275 kHz技术：DMOS
温度等级：AUTOMOTIVE端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL处于峰值回流温度下的最长时间：40
宽度：3.9 mmBase Number Matches：1

LM2671MX-ADJ/NOPB 数据手册

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April 2007  
LM2671  
SIMPLE SWITCHER® Power Converter High Efficiency  
500mA Step-Down Voltage Regulator with Features  
To simplify the LM2671 buck regulator design procedure,  
there exists computer design software, LM267X Made Sim-  
General Description  
The LM2671 series of regulators are monolithic integrated  
circuits built with a LMDMOS process. These regulators pro-  
vide all the active functions for a step-down (buck) switching  
regulator, capable of driving a 500mA load current with ex-  
cellent line and load regulation. These devices are available  
in fixed output voltages of 3.3V, 5.0V, 12V, and an adjustable  
output version.  
ple (version 6.0).  
Features  
Efficiency up to 96%  
■
■
■
Available in SO-8, 8-pin DIP and LLP packages  
Computer Design Software LM267X Made Simple  
(version 6.0)  
Requiring a minimum number of external components, these  
regulators are simple to use and include patented internal  
frequency compensation (Patent Nos. 5,382,918 and  
5,514,947), fixed frequency oscillator, external shutdown,  
soft-start, and frequency synchronization.  
Simple and easy to design with  
■
■
■
■
■
■
Requires only 5 external components  
Uses readily available standard inductors  
3.3V, 5.0V, 12V, and adjustable output versions  
The LM2671 series operates at a switching frequency of  
260 kHz, thus allowing smaller sized filter components than  
what would be needed with lower frequency switching regu-  
lators. Because of its very high efficiency (>90%), the copper  
traces on the printed circuit board are the only heat sinking  
needed.  
Adjustable version output voltage range: 1.21V to 37V  
±1.5% max output voltage tolerance over line and load  
conditions  
Guaranteed 500mA output load current  
■
0.25Ω DMOS Output Switch  
Wide input voltage range: 8V to 40V  
■
■
■
■
■
■
A family of standard inductors for use with the LM2671 are  
available from several different manufacturers. This feature  
greatly simplifies the design of switch-mode power supplies  
using these advanced ICs. Also included in the datasheet are  
selector guides for diodes and capacitors designed to work in  
switch-mode power supplies.  
260 kHz fixed frequency internal oscillator  
TTL shutdown capability, low power standby mode  
Soft-start and frequency synchronization  
Thermal shutdown and current limit protection  
Other features include a guaranteed ±1.5% tolerance on out-  
put voltage within specified input voltages and output load  
conditions, and ±10% on the oscillator frequency. External  
shutdown is included, featuring typically 50 μA stand-by cur-  
rent. The output switch includes current limiting, as well as  
thermal shutdown for full protection under fault conditions.  
Applications  
Simple High Efficiency (>90%) Step-Down (Buck)  
Regulator  
■
Efficient Pre-Regulator for Linear Regulators  
■
Typical Application  
(Fixed Output Voltage Versions)  
10004201  
SIMPLE SWITCHER® is a registered trademark of National Semiconductor Corporation  
Windows® is a registered trademark of Microsoft Corporation.  
© 2007 National Semiconductor Corporation  
100042  
www.national.com  
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