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LM2674M-5.0/NOPB

更新时间： 2024-09-29 12:02:11
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德州仪器 - TI 转换器稳压器开关光电二极管
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32页 1570K
描述
LM2674 SIMPLE SWITCHER® Power Converter High Efficiency 500 mA Step-Down Voltage Regulator

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LM2674M-5.0/NOPB 数据手册

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LM2674  
www.ti.com  
SNVS007F –SEPTEMBER 1998–REVISED APRIL 2013  
®
LM2674 SIMPLE SWITCHER Power Converter High Efficiency  
500 mA Step-Down Voltage Regulator  
Check for Samples: LM2674  
1
FEATURES  
DESCRIPTION  
The LM2674 series of regulators are monolithic  
234  
•
Efficiency up to 96%  
integrated circuits built with a LMDMOS process.  
These regulators provide all the active functions for a  
step-down (buck) switching regulator, capable of  
driving a 500 mA load current with excellent line and  
load regulation. These devices are available in fixed  
output voltages of 3.3V, 5.0V, 12V, and an adjustable  
output version.  
•
Available in SOIC-8, 8-Pin PDIP and WSON  
Packages  
•
Computer Design Software LM267X Made  
Simple (Version 6.0)  
•
•
•
•
Simple and Easy to Design With  
Requires Only 5 External Components  
Uses Readily Available Standard Inductors  
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) and a fixed  
frequency oscillator.  
3.3V, 5.0V, 12V, and Adjustable Output  
Versions  
•
•
Adjustable Version Output Voltage Range:  
1.21V to 37V  
The LM2674 series operates at a switching frequency  
of 260 kHz, thus allowing smaller sized filter  
components than what would be needed with lower  
frequency switching regulators. Because of its very  
high efficiency (>90%), the copper traces on the  
printed circuit board are the only heat sinking needed.  
±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  
260 kHz Fixed Frequency Internal Oscillator  
A family of standard inductors for use with the  
LM2674 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.  
TTL Shutdown Capability, Low Power Standby  
Mode  
•
Thermal Shutdown and Current Limit  
Protection  
TYPICAL APPLICATIONS  
•
Simple High Efficiency (>90%) Step-Down  
(Buck) Regulator  
•
•
Efficient Pre-Regulator for Linear Regulators  
Positive-to-Negative Converter  
Typical Application  
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.  
SIMPLE SWITCHER is a registered trademark of Texas Instruments.  
Windows is a registered trademark of Microsoft Corporation.  
All other trademarks are the property of their respective owners.  
2
3
4
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 © 1998–2013, Texas Instruments Incorporated  
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LM2674M-5.0/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM2671MX-3.3 TI

完全替代

 LM2671 SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage
LM2674M-5.0 TI

类似代替

 LM2674 SIMPLE SWITCHER® Power Converter High
LM2674MX-5.0/NOPB TI

类似代替

 LM2674 SIMPLE SWITCHER® Power Converter High

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 		SIMPLE SWITCHER Power Converter High Efficiency 500 mA Step-Down Voltage Regulator
LM2674MX-3.3/NOPB TI

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 		LM2674 SIMPLE SWITCHER® Power Converter High
LM2674MX-5.0 NSC

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 		SIMPLE SWITCHER Power Converter High Efficiency 500 mA Step-Down Voltage Regulator
LM2674MX-5.0/NOPB TI

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 		LM2674 SIMPLE SWITCHER® Power Converter High

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