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LM3679URX-1.2/NOPB PDF预览

LM3679URX-1.2/NOPB

更新时间: 2024-11-16 01:08:55
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描述
3MHz, 350mA Miniature Step-Down DC-DC Converter for Ultra Low Profile Applications (Height 0.55mm)

LM3679URX-1.2/NOPB 数据手册

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LM3679  
www.ti.com  
SNVS510A SEPTEMBER 2007REVISED FEBRUARY 2008  
LM3679 3MHz, 350mA Miniature Step-Down DC-DC Converter for Ultra Low Profile  
Applications (Height < 0.55mm)  
Check for Samples: LM3679  
1
FEATURES  
APPLICATIONS  
2
16 µA Typical Quiescent Current  
Mobile Phones  
PDAs  
350 mA Maximum Load Capability  
3 MHz PWM Fixed Switching Frequency (typ)  
Automatic PFM/PWM Mode Switching  
MP3 Players  
W-LAN  
Available in 5-Bump DSBGA YZR Package and  
YPD Package  
Portable Instruments  
Digital Still Cameras  
Portable Hard Disk Drives  
Internal Synchronous Rectification for High  
Efficiency  
Internal Soft Start  
DESCRIPTION  
The LM3679 step-down DC-DC converter is  
optimized for powering ultra-low voltage circuits from  
a single Li-Ion cell battery and input voltage rails from  
2.5V to 5.5V. It provides up to 350mA load current,  
over the entire input voltage range. The LM3679  
output voltage can be configured to 1.2V, 1.5V, or  
1.8V.  
0.01 µA Typical Shutdown Current  
Operates from a Single Li-Ion Cell Battery  
Current Overload and Thermal Shutdown  
Protection  
Three External Components Required for  
Typical Applications  
Low Profile Solution (0.55mm Max Height,  
Includes Four External Components)  
TYPICAL APPLICATION CIRCUIT  
V
IN  
2.5V to 5.5V  
L1: 1.0 mH  
V
OUT  
V
IN  
SW  
1
5
C
C
OUT  
10 mF  
IN  
4.7 mF  
LM3679  
2
GND  
EN  
FB  
3
4
Bill of Materials for Low Profile Solution:  
CIN = JMK107BJ475K (Taiyo - Yuden)  
COUT = JMK107BJ475K (Taiyo - Yuden) x2  
Inductor = LQM21PN1R0MC0 (MuRata)  
Figure 1. Typical Low Profile Application Circuit  
(0.55mm max height using LM3679UR)  
Figure 2. Efficiency vs. Output Current (VOUT  
1.8V)  
=
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 © 2007–2008, Texas Instruments Incorporated  
 

LM3679URX-1.2/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM3679UR-1.2/NOPB TI

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3MHz, 350mA Miniature Step-Down DC-DC Converter for Ultra Low Profile Applications (Height

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