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MIC2072-2PZQS

更新时间： 2024-11-06 10:57:23
品牌 Logo 应用领域
麦瑞 - MICREL 光电二极管控制器
页数 文件大小 规格书
16页 691K
描述
USB Power Controller

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中文翻译

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MIC2072-2PZQS 数据手册

 浏览型号MIC2072-2PZQS的Datasheet PDF文件第2页浏览型号MIC2072-2PZQS的Datasheet PDF文件第3页浏览型号MIC2072-2PZQS的Datasheet PDF文件第4页浏览型号MIC2072-2PZQS的Datasheet PDF文件第5页浏览型号MIC2072-2PZQS的Datasheet PDF文件第6页浏览型号MIC2072-2PZQS的Datasheet PDF文件第7页 
MIC2012/MIC2072  
USB Power Controller  
General Description  
Features  
TheMIC2012isadualchannelUSBpowerswitchdesignedto  
supportthepowerdistributionrequirementsforUSBWakeup  
from the ACPI S3 state. The MIC2012 will directly switch its  
two outputs between a 5V main supply and a 5V auxiliary  
supply normally provided in ATX style power supplies.  
• Compliant to USB power distribution specifications  
• UL Recognized Component  
• Two completely independent switches  
• Integrated switching matrix supports ACPI S0/S3 state  
transitions without external FET circuits  
• Make-before-break switching ensures glitch-free  
transitions  
The MIC2012 will adjust its current-limit threshold according  
to theACPI state it is in. In the normal active S0 state the cur-  
rent-limit is set at 500mAminimum per channel satisfying the  
USB continuous output current specification. In the S3 state  
the current-limit can be reduced to only 100mA per channel  
to minimize the current that is supplied by the auxiliary supply  
thereby ensuring that voltage regulation is maintained even  
during fault conditions.  
TheMIC2012providesmake-before-breakswitchingtoensure  
glitch-free transitions between the S3 and S0 states. Each  
channel is also thermally isolated from the other so that a  
fault in one channel does not effect the other. FAULT status  
output signals are also provided indicating overcurrent and  
thermal shutdown conditions.  
• No back-feed of auxiliary supply onto main supply dur-  
ing standby mode  
• Bi-level current-limit preserves auxiliary supply voltage  
regulation in standby mode  
• Thermally isolated channels  
• Thermal shutdown protection  
• Fault status outputs with filter prevents false assertions  
during hot-plug events  
• Latched thermal shutdown options with auto-reset  
(MIC2072)  
• Undervoltage lockout  
Applications  
The MIC2072 option latches the output off upon detecting  
an overcurrent condition for more than 5ms minimum. The  
output can be reset by either toggling the EN inputs of the  
MIC2072-1, -2 or by removing the load. Latching the output  
offprovidesacircuitbreakermodeofoperationwhichreduces  
power consumption during fault conditions.  
• Desktop PCs  
• Notebook PCs  
• Notebook Docking stations  
• LAN Servers  
• PC Motherboards  
Typical Application  
ATX Power Supply  
5V MAIN  
VBUS  
5V STANDBY  
Downstream  
D+  
D–  
MIC2012P  
USB  
Port 1  
OUT1  
OUT2  
MAIN  
AUX  
GND  
100F  
S3 Control  
S3#  
VBUS  
D+  
D–  
FAULT1#  
FAULT2#  
GND  
Downstream  
USB  
Port 2  
100F  
GND  
82801AA or Equivalent  
SLP S3#  
SLP S5#  
Overcurrent Port 1  
Overcurrent Port 1  
OC0  
OC1  
Figure 1. USB Wakeup with Control Input  
UL Recognized Component  
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com  
January 2005  
1
MIC2012/2072  
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