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MIC2012

更新时间： 2024-02-07 08:37:38
品牌 Logo 应用领域
麦瑞 - MICREL 控制器
页数 文件大小 规格书
10页 58K
描述
USB Power Controller Advance Information

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MIC2012 技术参数

是否Rohs认证：符合生命周期：Active
包装说明：SOP,Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
Factory Lead Time：7 weeks风险等级：5.63
Is Samacsys：N可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUITJESD-30 代码：R-PDSO-G8
JESD-609代码：e4长度：4.93 mm
湿度敏感等级：3信道数量：2
功能数量：1端子数量：8
最高工作温度：70 °C最低工作温度：
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）：260认证状态：Not Qualified
座面最大高度：1.73 mm最大供电电压 (Vsup)：5.5 V
最小供电电压 (Vsup)：4.5 V标称供电电压 (Vsup)：5 V
表面贴装：YES温度等级：COMMERCIAL
端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)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：3.94 mm
Base Number Matches：1

MIC2012 数据手册

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MIC2012/MIC2072  
USB Power Controller  
Advance Information  
General Description  
Features  
The MIC2012 is a dual channel USB power switch designed  
tosupportthepowerdistributionrequirementsforUSBWakeup  
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  
• 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  
• Latched thermal shutdown options with auto-reset  
(MIC2072)  
The MIC2012 will adjust its current-limit threshold according  
to the ACPI state it is in. In the normal active S0 state the  
current-limit is set at 500mA minimum 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.  
The MIC2012 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.  
• 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  
off provides a circuit breaker mode of operation which re-  
duces 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+  
MIC2012P  
USB  
Port 1  
D–  
OUT1  
OUT2  
MAIN  
GND  
100µF  
AUX  
S3 Control  
S3#  
VBUS  
D+  
FAULT1#  
Downstream  
USB  
Port 2  
FAULT2#  
GND  
D–  
100µF  
GND  
82801AA or Equivalent  
SLP S3#  
SLP S5#  
Overcurrent Port 1  
Overcurrent Port 1  
OC0  
OC1  
Figure 1. USB Wakeup with Control Input  
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
MIC2012/2072  
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