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MIC2070-1CQS PDF预览

MIC2070-1CQS

更新时间： 2024-11-05 22:06:47
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
9页 53K
描述
USB Power Controller Advance Information

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中文翻译

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MIC2070-1CQS 数据手册

 浏览型号MIC2070-1CQS的Datasheet PDF文件第2页浏览型号MIC2070-1CQS的Datasheet PDF文件第3页浏览型号MIC2070-1CQS的Datasheet PDF文件第4页浏览型号MIC2070-1CQS的Datasheet PDF文件第5页浏览型号MIC2070-1CQS的Datasheet PDF文件第6页浏览型号MIC2070-1CQS的Datasheet PDF文件第7页 
MIC2010/MIC2070  
USB Power Controller  
Advance Information  
General Description  
Features  
The MIC2010 is a dual channel USB power switch designed  
tosupportthepowerdistributionrequirementsforUSBWakeup  
from the ACPI S3 state. The MIC2010 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  
• 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  
• No back-feed of auxiliary supply onto main supply  
during 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  
• Circuit breaker options with auto-reset (MIC2070)  
• Undervoltage lockout  
The MIC2010 will adjust its current-limit threshold according  
to the ACPI state it is in. In the normal active ACPI S0 state  
the current-limit is set at 500mA minimum per channel  
satisfyingtheUSBcontinuousoutputcurrentspecification. In  
the S3 state the current-limit can be reduced to a value  
determined by an external resistor to minimize the current  
that is supplied by the auxiliary supply, thereby ensuring that  
voltage regulation is maintained even during fault conditions.  
The MIC2010 provides make-before-break switching to en-  
sure 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.  
Applications  
• Desktop PCs  
The MIC2070 option latches the output off upon detecting an  
overcurrent condition lasting for more than 5ms minimum.  
TheoutputcanberesetbyeithertogglingtheENinputsofthe  
MIC2070-1/-2 or by removing the load. Latching the output  
off provides a circuit breaker mode of operation which re-  
duces power consumption during fault conditions.  
• Notebook PCs  
• Notebook docking stations  
• LAN Servers  
• PC motherboard  
Typical Application  
ATX Power Supply  
5V MAIN  
VBUS  
5V STANDBY  
Downstream  
USB  
Port 1  
D+  
MIC2010-1P/-2P  
D–  
MAIN  
AUX  
100µF  
GND  
OUT1  
OUT2  
ON/OFF 1  
ON/OFF 2  
EN1  
VBUS  
D+  
EN2  
Downstream  
USB  
Port 2  
S3# CONTROL  
RSET1  
S3#  
D–  
FAULT1  
100µF  
GND  
FAULT1 RSET2  
GND  
82801AA or Equivalent  
SLP S3#  
SLP S5#  
Overcurrent Port 1  
Overcurrent Port 1  
OC0  
OC1  
Figure 1. USB Wakeup From ACPI S3 System Diagram  
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com  
September 2000  
1
MIC2010/2070  
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