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LM3674MF-1.8 PDF预览

LM3674MF-1.8

更新时间： 2024-11-15 12:02:11
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德州仪器 - TI 转换器
页数 文件大小 规格书
25页 4419K
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LM3674 2MHz, 600mA Step-Down DC-DC Converter in SOT-23

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LM3674MF-1.8 数据手册

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LM3674  
www.ti.com  
SNVS405F –DECEMBER 2005–REVISED MAY 2013  
LM3674 2MHz, 600mA Step-Down DC-DC Converter in SOT-23  
Check for Samples: LM3674  
1
FEATURES  
DESCRIPTION  
The LM3674 step-down DC-DC converter is  
optimized for powering low voltage circuits from a  
single Li-Ion cell battery and input voltage rails from  
2.7V to 5.5V. It provides up to 600mA load current,  
over the entire input voltage range. There are several  
fixed output voltages and adjustable output voltage  
versions.  
2
•
•
•
600mA Max Load Current  
Input Voltage Range from 2.7V to 5.5V  
Available in Fixed and Adjustable Output  
Voltages Ranging from 1.0V to 3.3V  
•
•
Operates from a Single Li-Ion Cell Battery  
Internal Synchronous Rectification for High  
Efficiency  
The device offers superior features and performance  
for mobile phones and similar portable systems.  
During PWM mode, the device operates at a fixed-  
frequency of 2 MHz (typ). Internal synchronous  
rectification provides high efficiency during Pulse  
Width Modulation (PWM) mode operation. In  
shutdown mode, the device turns off and reduces  
battery consumption to 0.01 µA (typ).  
•
•
•
•
•
Internal Soft Start  
0.01 µA Typical Shutdown Current  
2 MHz PWM Fixed Switching Frequency (typ)  
5-Pin SOT-23 Package  
Current Overload Protection and Thermal  
Shutdown Protection  
The LM3674 is available in a 5-pin SOT-23 package  
in leaded (PB) and lead-free (NO PB) versions. A  
high switching frequency of 2 MHz (typ) allows use of  
only three tiny external surface-mount components,  
an inductor and two ceramic capacitors.  
APPLICATIONS  
•
•
•
•
•
•
•
Mobile Phones  
PDAs  
MP3 Players  
Portable Instruments  
W-LAN  
Digital Still Cameras  
Portable Hard Disk Drives  
TYPICAL APPLICATION CIRCUITS  
V
IN  
L1:2.2 mH  
V
OUT  
2.7V to 5.5V  
V
IN  
SW  
1
2
5
C
OUT  
C
IN  
LM3674  
10 mF  
4.7 mF  
GND  
EN  
FB  
4
3
Figure 1. Typical Application Circuit  
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 © 2005–2013, Texas Instruments Incorporated  
 
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LM3674MF-1.8 替代型号

型号 品牌 替代类型 描述 数据表
LM3674MFX-1.8/NOPB TI

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 LM3674 2MHz, 600mA Step-Down DC-DC Converter in SOT-23
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 LM3674 2MHz, 600mA Step-Down DC-DC Converter in SOT-23
LM3674MF-1.8/NOPB TI

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