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LM22671MRE-5.0

更新时间： 2024-09-15 12:18:39
品牌 Logo 应用领域
德州仪器 - TI 稳压器
页数 文件大小 规格书
25页 1273K
描述
LM22671/LM22671-Q1 42V, 500mA SIMPLE SWITCHER® Step-Down Voltage Regulator

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LM22671MRE-5.0 数据手册

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LM22671  
www.ti.com  
SNVS589M –SEPTEMBER 2008–REVISED APRIL 2013  
LM22671/LM22671-Q1 42V, 500mA SIMPLE SWITCHER® Step-Down Voltage Regulator  
with Features  
Check for Samples: LM22671  
1
FEATURES  
DESCRIPTION  
The LM22671 switching regulator provides all of the  
functions necessary to implement an efficient high  
voltage step-down (buck) regulator using a minimum  
of external components. This easy to use regulator  
2
•
Wide Input Voltage Range: 4.5V to 42V  
Internally Compensated Voltage Mode Control  
Stable with Low ESR Ceramic capacitors  
200 mΩ N-Channel MOSFET  
•
•
•
•
incorporates  
a 42V N-channel MOSFET switch  
capable of providing up to 500mA of load current.  
Excellent line and load regulation along with high  
efficiency (>90%) are featured. Voltage mode control  
offers short minimum on-time, allowing the widest  
ratio between input and output voltages. Internal loop  
compensation means that the user is free from the  
tedious task of calculating the loop compensation  
components. Fixed 5V output and adjustable output  
voltage options are available. The default switching  
frequency is set at 500 kHz allowing for small  
external components and good transient response. In  
addition, the frequency can be adjusted over a range  
of 200 kHz to 1MHz with a single external resistor.  
The internal oscillator can be synchronized to a  
system clock or to the oscillator of another regulator.  
A precision enable input allows simplification of  
regulator control and system power sequencing. In  
shutdown mode the regulator draws only 25 µA (typ.).  
An adjustable soft-start feature is provided through  
the selection of a single external capacitor. The  
LM22671 also has built in thermal shutdown, and  
current limiting to protect against accidental  
overloads.  
Output Voltage Options:  
–
–
ADJ (Outputs as Low as 1.285V)  
5.0 (Output Fixed to 5V)  
•
•
•
±1.5% Feedback Reference Accuracy  
500 kHz Default Switching Frequency  
Adjustable Switching Frequency and  
Synchronization  
•
–40°C to 125°C Operating Junction  
Temperature Range  
•
•
•
•
•
Precision Enable Pin  
Integrated Boot-Strap Diode  
Adjustable Soft-Start  
Fully WEBENCH® Enabled  
LM22671-Q1 is an Automotive Grade Product  
that is AEC-Q100 Grade 1 Qualified (-40°C to  
+125°C Operating Junction Temperature)  
PACKAGE  
•
SO PowerPAD (Exposed Pad)  
The LM22671 is a member of Texas Instruments'  
SIMPLE SWITCHER™ family. The SIMPLE  
SWITCHER™ concept provides for an easy to use  
complete design using a minimum number of external  
components and the TI WEBENCH® design tool. TI's  
WEBENCH® tool includes features such as external  
component calculation, electrical simulation, thermal  
simulation, and Build-It boards for easy design-in.  
APPLICATIONS  
•
•
•
•
Industrial Control  
Telecom and Datacom Systems  
Embedded Systems  
Conversions from Standard 24V, 12V and 5V  
Input Rails  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2008–2013, Texas Instruments Incorporated  
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LM22671MRE-5.0 替代型号

型号 品牌 替代类型 描述 数据表
LM22671MRE-5.0/NOPB TI

类似代替

 LM22671/-Q1 42 V, 500 mA SIMPLE SWITCHER® St
LM22671MR-5.0/NOPB TI

类似代替

 LM22671/-Q1 42 V, 500 mA SIMPLE SWITCHER® St

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