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LM22671QMRE-5.0/NOPB

更新时间： 2024-11-07 00:54:23
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LM22671/-Q1 42 V, 500 mA SIMPLE SWITCHER® Step-Down Voltage Regulator with Features

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LM22671, LM22671-Q1  
SNVS589N –SEPTEMBER 2008–REVISED NOVEMBER 2014  
®
LM22671/-Q1 42 V, 500 mA SIMPLE SWITCHER Step-Down Voltage Regulator  
with Features  
1 Features  
3 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  
incorporates a 42 V N-channel MOSFET switch  
capable of providing up to 500 mA 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 5 V 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 1 MHz 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 device also has built-in thermal shutdown  
and current limiting to protect against accidental  
overloads.  
1
•
Wide Input Voltage Range: 4.5 V to 42 V  
Internally Compensated Voltage Mode Control  
Stable with Low ESR Ceramic capacitors  
200 mΩ N-Channel MOSFET  
•
•
•
•
Output Voltage Options:  
-ADJ (Outputs as Low as 1.285 V)  
-5.0 (Output Fixed to 5 V)  
•
•
•
±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)  
•
SO PowerPAD™ (Exposed Pad)  
2 Applications  
•
•
•
•
Industrial Control  
The LM22671 device 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.  
Telecom and Datacom Systems  
Embedded Systems  
Conversions from Standard 24 V, 12 V and 5 V  
Input Rails  
Simplified Application Schematic  
VIN  
FB  
BOOT  
SW  
VIN  
Device Information(1)  
LM22671-ADJ  
PART NUMBER  
LM22671  
PACKAGE  
BODY SIZE (NOM)  
VOUT  
RT/SYNC SS EN GND  
HSOP (8)  
4.89 mm x 3.90 mm  
LM22671-Q1  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 
 
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LM22671QMRE-5.0/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM22671QMRX-5.0/NOPB TI

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