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LM3679UR-1.2/NOPB PDF预览

LM3679UR-1.2/NOPB

更新时间: 2024-11-16 02:58:43
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德州仪器 - TI 开关
页数 文件大小 规格书
24页 5781K
描述
3MHz, 350mA Miniature Step-Down DC-DC Converter for Ultra Low Profile Applications (Height 0.55mm)

LM3679UR-1.2/NOPB 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:BGA
包装说明:VFBGA,针数:5
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01Factory Lead Time:1 week
风险等级:1.42其他特性:CURRENT MODE CONTROL IS ALSO POSSIBLE IN PFM CONTROL TECHNIQUE
模拟集成电路 - 其他类型:SWITCHING REGULATOR控制模式:VOLTAGE-MODE
控制技术:PULSE WIDTH MODULATION最大输入电压:5.5 V
最小输入电压:2.5 V标称输入电压:3.6 V
JESD-30 代码:R-PBGA-B5JESD-609代码:e1
长度:1.495 mm湿度敏感等级:1
功能数量:1端子数量:5
最高工作温度:85 °C最低工作温度:-30 °C
最大输出电流:1.075 A最大输出电压:1.8 V
最小输出电压:1.8 V标称输出电压:1.2 V
封装主体材料:PLASTIC/EPOXY封装代码:VFBGA
封装形状:RECTANGULAR封装形式:GRID ARRAY, VERY THIN PROFILE, FINE PITCH
峰值回流温度(摄氏度):260认证状态:Not Qualified
座面最大高度:0.425 mm表面贴装:YES
切换器配置:BUCK最大切换频率:3500 kHz
温度等级:OTHER端子面层:Tin/Silver/Copper (Sn/Ag/Cu)
端子形式:BALL端子节距:0.5 mm
端子位置:BOTTOM处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:1.128 mmBase Number Matches:1

LM3679UR-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  
 

LM3679UR-1.2/NOPB 替代型号

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