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LM3671MFX-1.875 PDF预览

LM3671MFX-1.875

更新时间： 2024-11-15 02:58:47
品牌 Logo 应用领域
德州仪器 - TI 开关光电二极管
页数 文件大小 规格书
38页 6811K
描述
LM3671, LM3671Q 2MHz, 600mA Step-Down DC-DC Converter

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LM3671MFX-1.875 数据手册

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LM3671  
LM3671Q  
www.ti.com  
SNVS294Q –NOVEMBER 2004–REVISED NOVEMBER 2013  
LM3671, LM3671Q 2MHz, 600mA Step-Down DC-DC Converter  
Check for Samples: LM3671, LM3671Q  
1
FEATURES  
APPLICATIONS  
2
•
•
•
•
•
16 µA Typical Quiescent Current  
•
•
•
•
•
•
•
•
Mobile Phones  
PDAs  
600 mA Maximum Load Capability  
2 MHz PWM Fixed Switching Frequency (typ.)  
Automatic PFM/PWM Mode Switching  
MP3 Players  
W-LAN  
Internal Synchronous Rectification for High  
Efficiency  
Portable Instruments  
Digital Still Cameras  
Portable Hard Disk Drives  
Automotive  
•
•
•
•
Internal Soft Start  
0.01 µA Typical Shutdown Current  
Operates from a Single Li-Ion Cell Battery  
DESCRIPTION  
Only Three Tiny Surface-Mount External  
Components Required (One Inductor, Two  
Ceramic Capacitors)  
The LM3671 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 600 mA load current,  
over the entire input voltage range. There are several  
different fixed voltage output options available as well  
as an adjustable output voltage version range from  
1.1V to 3.3V.  
•
•
•
•
Current Overload and Thermal Shutdown  
Protection  
Available in Fixed Output Voltages and  
Adjustable Version  
LM3671Q is an Automotive Grade Product that  
is AEC-Q100 Grade 1 Qualified  
The device offers superior features and performance  
for mobile phones and similar portable systems.  
Automatic intelligent switching between PWM low-  
noise and PFM low-current mode offers improved  
system control. During PWM mode, the device  
operates at a fixed-frequency of 2 MHz (typ.).  
Hysteretic PFM mode extends the battery life by  
reducing the quiescent current to 16 µA (typ.) during  
light load and standby operation. Internal  
synchronous rectification provides high efficiency  
during PWM mode operation. In shutdown mode, the  
device turns off and reduces battery consumption to  
0.01 µA (typ.).  
SOT-23, 5-Bump DSBGA and 6-Pin USON  
Packages  
TYPICAL APPLICATION CIRCUITS  
V
IN  
L1: 2.2 PH  
2.7V to 5.5V  
V
V
OUT  
IN  
SW  
1
2
3
5
C
OUT  
C
IN  
LM3671  
10 PF  
GND  
EN  
4.7 PF  
FB  
4
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.  
All trademarks are the property of their respective owners.  
2
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 © 2004–2013, Texas Instruments Incorporated  
 
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LM3671MFX-1.875 替代型号

型号 品牌 替代类型 描述 数据表
LM3671MFX-1.875/NOPB TI

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