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MIC2178YWM-TR PDF预览

MIC2178YWM-TR

更新时间: 2024-11-11 14:53:35
品牌 Logo 应用领域
美国微芯 - MICROCHIP 开关光电二极管
页数 文件大小 规格书
15页 175K
描述
6A SWITCHING REGULATOR, 240kHz SWITCHING FREQ-MAX, PDSO20

MIC2178YWM-TR 技术参数

是否Rohs认证:符合生命周期:Active
包装说明:LEAD FREE, SOIC-20Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
Factory Lead Time:12 weeks风险等级:5.66
Is Samacsys:N模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:CURRENT-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:16.5 V最小输入电压:4.5 V
标称输入电压:7 VJESD-30 代码:R-PDSO-G20
JESD-609代码:e3长度:12.878 mm
湿度敏感等级:1功能数量:1
端子数量:20最高工作温度:85 °C
最低工作温度:-40 °C最大输出电流:6 A
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):250认证状态:Not Qualified
座面最大高度:2.616 mm表面贴装:YES
切换器配置:BUCK最大切换频率:240 kHz
温度等级:INDUSTRIAL端子面层:Matte Tin (Sn) - annealed
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:40
宽度:7.6 mmBase Number Matches:1

MIC2178YWM-TR 数据手册

 浏览型号MIC2178YWM-TR的Datasheet PDF文件第2页浏览型号MIC2178YWM-TR的Datasheet PDF文件第3页浏览型号MIC2178YWM-TR的Datasheet PDF文件第4页浏览型号MIC2178YWM-TR的Datasheet PDF文件第5页浏览型号MIC2178YWM-TR的Datasheet PDF文件第6页浏览型号MIC2178YWM-TR的Datasheet PDF文件第7页 
MIC2178  
Micrel, Inc.  
MIC2178  
2.5A Synchronous Buck Regulator  
General Description  
Features  
The Micrel MIC2178 is a 200kHz synchronous buck (step-  
down) switching regulator designed for high-efficiency, bat-  
tery-powered applications.  
• 4.5V to 16.5V input voltage range  
• Dual-mode operation for high efficiency (up to 96%)  
PWM mode for > 200mA load current  
Skip mode for < 200mA load current  
• 100minternal power MOSFETs at 12V input  
• 200kHz preset switching frequency  
• Low quiescent current  
The MIC2178 operates from a 4.5V to 16.5V input and  
features internal power MOSFETs that can supply up to 2.5A  
output current. It can operate with a maximum duty cycle of  
100% for use in low-dropout conditions. It also features a  
shutdown mode that reduces quiescent current to less than  
5µA.  
1.0mA in PWM mode  
600µA in skip mode  
< 5µA in shutdown mode  
The MIC2178 achieves high efficiency over a wide output  
current range by operating in either PWM or skip mode. The  
operating mode is externally selected, typically by an intelli-  
gentsystem, whichchoosestheappropriatemodeaccording  
to operating conditions, efficiency, and noise requirements.  
The switching frequency is preset to 200kHz and can be  
synchronized to an external clock signal of up to 300kHz.  
• Current-mode control  
Simplified loop compensation  
Superior line regulation  
• 100% duty cycle for low dropout operation  
• Current limit  
• Thermal shutdown  
• Undervoltage lockout  
TheMIC2178usescurrent-modecontrolwithinternalcurrent  
sensing. Current-mode control provides superior line regula-  
tion and makes the regulator control loop easy to compen-  
sate. The output is protected with pulse-by-pulse current  
limiting and thermal shutdown. Undervoltage lockout turns  
the output off when the input voltage is less than 4.5V.  
Applications  
• High-efficiency, battery-powered supplies  
• Buck (step-down) dc-to-dc converters  
• Palmtop computers  
• Laptop computers  
• Cellular telephones  
TheMIC2178and ispackagedina20-leadwidepowerSOIC  
package with an operating temperature range of –40°C to  
+85°C.  
• Hand-held instruments  
• Battery Chargers  
See the MIC2177 for automatic selection of PWM or skip-  
mode operation.  
Typical Application  
VIN  
5.4V to 18V  
5V Output  
C2  
C1  
22µF  
35V  
Efficiency  
22µF  
35V  
ON  
OFF  
ENABLE  
100  
1,2,9  
U1  
EN  
VIN  
MIC2178-5.0  
R1  
95  
20  
11  
10  
18  
10  
20k  
VOUT  
OUT  
SW  
L1, 33µH  
5V/2.5A  
3,8  
4–7  
12  
Ouput Good  
Output Low  
90  
85  
80  
75  
70  
VIN = 6V  
PWRGD  
D1  
Skip Mode  
MBRS140  
C5  
220µF  
10V  
C6  
PGND  
PWM Mode  
PWM  
220µF  
10V  
FB  
BIAS  
19  
SYNC  
COMP  
13  
SGND  
14–17  
SKIP  
PWM  
R1  
C4  
10k  
R2  
0.01µF  
10k  
C3  
10  
100  
1000 2500  
6.8nF  
OUTPUT CURRENT (mA)  
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com  
M9999-031805  
March 2005  
1

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