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LM22671QMR-ADJ

更新时间： 2024-11-06 11:33:59
品牌 Logo 应用领域
美国国家半导体 - NSC 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管输出元件
页数 文件大小 规格书
18页 416K
描述
500 mA SIMPLE SWITCHER?, Step-Down Voltage Regulator with Features

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中文翻译

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LM22671QMR-ADJ 技术参数

生命周期：Transferred包装说明：HLSOP,
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.59
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 VJESD-30 代码：R-PDSO-G8
长度：4.9 mm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
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, HEAT SINK/SLUG, LOW PROFILE
认证状态：Not Qualified座面最大高度：1.68 mm
表面贴装：YES切换器配置：BUCK
最大切换频率：600 kHz温度等级：AUTOMOTIVE
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL宽度：3.9 mm
Base Number Matches：1

LM22671QMR-ADJ 数据手册

 浏览型号LM22671QMR-ADJ的Datasheet PDF文件第2页浏览型号LM22671QMR-ADJ的Datasheet PDF文件第3页浏览型号LM22671QMR-ADJ的Datasheet PDF文件第4页浏览型号LM22671QMR-ADJ的Datasheet PDF文件第5页浏览型号LM22671QMR-ADJ的Datasheet PDF文件第6页浏览型号LM22671QMR-ADJ的Datasheet PDF文件第7页 
December 10, 2010  
LM22671/LM22671Q  
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  
LM22671Q is an Automotive Grade product that is AEC-  
Q100 grade 1 qualified (-40°C to +125°C operating  
junction temperature)  
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  
© 2010 National Semiconductor Corporation  
300768  
www.national.com  
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