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MIC4681BM

更新时间： 2024-11-18 22:51:23
品牌 Logo 应用领域
麦瑞 - MICREL 稳压器
页数 文件大小 规格书
19页 397K
描述
2A-Peak SuperSwitcher⑩ SOP-8 Buck Regulator

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中文翻译

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MIC4681BM 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：SOIC包装说明：SOP, SOP8,.25
针数：8Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.59模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：VOLTAGE-MODE最大输入电压：30 V
最小输入电压：4 V标称输入电压：12 V
JESD-30 代码：R-PDSO-G8JESD-609代码：e0
长度：4.9 mm湿度敏感等级：1
功能数量：1端子数量：8
最高工作温度：125 °C最低工作温度：-40 °C
最大输出电流：2.1 A封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装等效代码：SOP8,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：240认证状态：Not Qualified
座面最大高度：1.879 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：BUCK
最大切换频率：220 kHz温度等级：AUTOMOTIVE
端子面层：Tin/Lead (Sn85Pb15)端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30宽度：3.9 mm
Base Number Matches：1

MIC4681BM 数据手册

 浏览型号MIC4681BM的Datasheet PDF文件第2页浏览型号MIC4681BM的Datasheet PDF文件第3页浏览型号MIC4681BM的Datasheet PDF文件第4页浏览型号MIC4681BM的Datasheet PDF文件第5页浏览型号MIC4681BM的Datasheet PDF文件第6页浏览型号MIC4681BM的Datasheet PDF文件第7页 
MIC4681  
2A-Peak SuperSwitcher™ SOP-8 Buck Regulator  
Final Information  
General Description  
Features  
The MIC4681 SuperSwitcher™ is an easy-to-use step-down  
(buck) voltage-mode switching regulator. The 200kHz  
MIC4681 achieves over 1A of continuous output current over  
a 4V to 30V input range in an 8-lead SOPpackage . The  
MIC4681 features a high 2.1A minimum current limit, making  
the device ideal for pulsed current applications such as GSM  
and TDMA cell phone battery chargers and power supplies.  
The MIC4681 sustains an output of 4.2V/2A within a typical  
GSM charging environment.  
• SO-8 package with over 1A continuous output current  
• Capable of 2A pulse charging for GSM applications  
• All surface mount solution  
• Only 4 external components required  
• Fixed 200kHz operation  
• Output adjustable down to 1.25V  
• Internally compensated with fast transient response  
• Wide 4V to 30V operating input voltage range  
• Less than 6µA typical shutdown-mode current  
• Up to 90% efficiency  
The MIC4681 has an input voltage range of 4V to 30V, with  
excellent line, load, and transient response. The regulator  
performs cycle-by-cycle current limiting and thermal shut-  
down for protection under fault conditions. In shutdown  
mode, the regulator draws less than 6µA of standby current.  
• Thermal shutdown  
• Overcurrent protection  
Applications  
The MIC4681 SuperSwitcher™ regulator requires a mini-  
mum number of external components and can operate using  
a standard series of inductors and capacitors. Frequency  
compensation is provided internally for fast transient re-  
sponse and ease of use.  
• Cellular phone battery charger  
• Cellular phone power supply  
• Simple 1A continuous high-efficiency step-down (buck)  
regulator  
• Replacement of a TO-220 and TO-263 designs  
• Positive-to-negative converter (inverting buck-boost)  
• Negative boost converter  
The MIC4681 is available in the 8-lead SOP with a  
–40°C to +125°C junction temperature range.  
• Higher output current regulator using external FET  
Typical Applications  
MIC4681BM  
L1  
+5V to +30V  
2.5V/1A  
2
1
3
4
IN  
SW  
C1  
22µF  
68µH  
R1  
C2  
220µF  
10V  
3.01k  
35V  
SHUTDOWN  
ENABLE  
SHDN  
FB  
D1  
R2  
2.94k  
GND  
5–8  
B340A or  
SS36  
Power  
SOP-8  
Adjustable Regulator Circuit  
SuperSwitcher is a trademark of Micrel, Inc.  
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com  
February 2001  
1
MIC4681  
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中文翻译

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