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MIC4685YR PDF预览

MIC4685YR

更新时间: 2024-01-08 22:04:25
品牌 Logo 应用领域
美国微芯 - MICROCHIP 开关
页数 文件大小 规格书
15页 2094K
描述
SWITCHING REGULATOR, 225kHz SWITCHING FREQ-MAX, PSSO7

MIC4685YR 技术参数

是否Rohs认证: 符合生命周期:Active
包装说明:,Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.17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:30 V最小输入电压:4 V
标称输入电压:12 VJESD-30 代码:R-PSSO-G7
JESD-609代码:e3长度:9.395 mm
湿度敏感等级:3功能数量:1
端子数量:7最高工作温度:125 °C
最低工作温度:-40 °C封装主体材料:PLASTIC/EPOXY
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):260认证状态:Not Qualified
座面最大高度:2.16 mm表面贴装:YES
切换器配置:BUCK最大切换频率:225 kHz
温度等级:AUTOMOTIVE端子面层:Matte Tin (Sn)
端子形式:GULL WING端子节距:1.27 mm
端子位置:SINGLE处于峰值回流温度下的最长时间:40
宽度:8 mmBase Number Matches:1

MIC4685YR 数据手册

 浏览型号MIC4685YR的Datasheet PDF文件第8页浏览型号MIC4685YR的Datasheet PDF文件第9页浏览型号MIC4685YR的Datasheet PDF文件第10页浏览型号MIC4685YR的Datasheet PDF文件第12页浏览型号MIC4685YR的Datasheet PDF文件第13页浏览型号MIC4685YR的Datasheet PDF文件第14页 
MIC4685  
Micrel, Inc.  
Layout Considerations  
Bootstrap Diode  
Thebootstrapdiodeprovidesanexternalbiassourcedirectly  
to the main pass element, this reduces V thus allowing  
Layout is very important when designing any switching regu-  
lator. Rapidly changing currents, through the printed circuit  
board traces and stray inductance, can generate voltage  
transients which can cause problems.  
SAT  
the MIC4685 to be used in very low head-room applications  
i.e., 5V to 3.3V with high efficiencies. Bootstrap diode  
IN  
OUT  
not for use if V exceeds 16V, V . See Figure 3.  
To minimize stray inductance and ground loops, keep trace  
lengths as short as possible. For example, keep D1 close  
to pin 6 and pin 4, and Tab, keep L1 away from sensitive  
IN  
IN  
node FB, and keep C close to pin 2 and pin 4, and Tab.  
IN  
See “Applications Information: Thermal Considerations” for  
ground plane layout.  
The feedback pin should be kept as far way from the switch-  
ing elements (usually L1 and D1) as possible.  
A circuit with sample layouts are provided. See Figure 7.  
Gerber files are available upon request.  
VIN  
+4V to +30V  
MIC4685BR  
(34V transient)  
2
5
1
6
IN  
EN  
BS  
L1  
VOUT  
R1  
SW  
CIN  
39µH  
COUT  
3
FB  
7-lead  
SPAK  
GND  
D1  
44T,abTab  
R2  
GND  
Figure 3. Critical Traces for Layout  
March 2005  
11  
M9999-031805  

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