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LM22671MRX-ADJ

更新时间： 2024-09-15 05:41:59
品牌 Logo 应用领域
美国国家半导体 - NSC 稳压器
页数 文件大小 规格书
18页 414K
描述
500 mA SIMPLE SWITCHER®, Step-Down Voltage Regulator with Features

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中文翻译

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LM22671MRX-ADJ 技术参数

是否Rohs认证： 不符合生命周期：Transferred
包装说明：HLSOP, SOP8,.25Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.13其他特性：ALSO HAS ADJUSTABLE OUTPUTS AS LOW AS 1.285V
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：VOLTAGE-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：42 V
最小输入电压：4.5 V标称输入电压：12 V
JESD-30 代码：R-PDSO-G8JESD-609代码：e0
长度：4.9 mm湿度敏感等级：3
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：0.9 A封装主体材料：PLASTIC/EPOXY
封装代码：HLSOP封装等效代码：SOP8,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, HEAT SINK/SLUG, LOW PROFILE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1.68 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：600 kHz温度等级：AUTOMOTIVE
端子面层：TIN LEAD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 mm
Base Number Matches：1

LM22671MRX-ADJ 数据手册

 浏览型号LM22671MRX-ADJ的Datasheet PDF文件第2页浏览型号LM22671MRX-ADJ的Datasheet PDF文件第3页浏览型号LM22671MRX-ADJ的Datasheet PDF文件第4页浏览型号LM22671MRX-ADJ的Datasheet PDF文件第5页浏览型号LM22671MRX-ADJ的Datasheet PDF文件第6页浏览型号LM22671MRX-ADJ的Datasheet PDF文件第7页 
December 18, 2009  
LM22671  
500 mA SIMPLE SWITCHER®, Step-Down Voltage  
Regulator with Features  
General Description  
Features  
The LM22671 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 500  
mA loads with excellent line and load regulation characteris-  
tics. High efficiency (>90%) is obtained through the use of a  
low ON-resistance N-channel MOSFET. The series consists  
of a fixed 5V output and an adjustable version.  
Wide input voltage range: 4.5V to 42V  
■
■
■
■
■
Internally compensated voltage mode control  
Stable with low ESR ceramic capacitors  
200 mΩ N-channel MOSFET  
Output voltage options:  
-ADJ (outputs as low as 1.285V)  
-5.0 (output fixed to 5V)  
The SIMPLE SWITCHER® concept provides for an easy to  
use complete design using a minimum number of external  
components and National’s WEBENCH® design tool.  
National’s WEBENCH® tool includes features such as exter-  
nal component calculation, electrical simulation, thermal sim-  
ulation, and Build-It boards for easy design-in. The switching  
clock frequency is provided by an internal fixed frequency os-  
cillator which operates at 500 kHz. The switching frequency  
can also be adjusted with an external resistor or synchronized  
to an external clock up to 1 MHz. It is also possible to self-  
synchronize multiple regulators to share the same switching  
frequency. The LM22671 series also has built in thermal shut-  
down, current limiting and an enable control input that can  
power down the regulator to a low 25 µA quiescent current  
standby condition. An adjustable soft-start feature is provided  
by selecting an appropriate external soft-start capacitor.  
±1.5% feedback reference accuracy  
■
■
Switching frequency of 500 kHz, adjustable between 200  
kHz and 1 MHz  
-40°C to 125°C operating junction temperature range  
Precision enable pin  
■
■
■
■
■
■
Integrated boot diode  
Adjustable soft-start  
Fully WEBENCH® enabled  
Step-down and inverting buck-boost applications  
Package  
PSOP-8 (Exposed Pad)  
■
Applications  
Industrial Control  
■
■
■
■
Telecom and Datacom Systems  
Embedded Systems  
Automotive Telematics and Body Electronics  
Conversions from Standard 24V, 12V and 5V Input Rails  
■
Simplified Application Schematic  
30076801  
© 2009 National Semiconductor Corporation  
300768  
www.national.com  
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