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MIC2536

更新时间： 2024-09-21 14:55:23
品牌 Logo 应用领域
美国微芯 - MICROCHIP /
页数 文件大小 规格书
13页 112K
描述
The MIC2536 is a cost-effective high-side power switch, with two independently controlled channels

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中文翻译

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MIC2536 数据手册

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MIC2536  
Dual USB Power Distribution Switch  
Final Information  
General Description  
Features  
The MIC2536 is a cost-effective high-side power switch, with  
two independently controlled channels, optimized for bus-  
poweredUniversalSerialBus(USB)applications. Fewexter-  
nal components are necessary to satisfy USB requirements.  
• Compliant to USB specifications  
• 2.7V to 5.5V operating range  
• 150mA minimum continuous load current per channel  
• 400mΩ typical on-resistance  
• Fast-acting short circuit protection with  
thermal shutdown  
• Integrated filter eliminates  
Each switch channel of the MIC2536 will supply up to 100mA  
asrequiredforUSBbus-powereddownstreamdevices.Fault  
current is limited to typically 275mA by fast-acting current-  
limit circuitry which minimizes voltage droop on the upstream  
port during fault conditions. A flag output with transient filter  
indicates fault conditions to the local USB controller but will  
ignore short flag signals resulting from inrush current during  
hot plug-in events.  
false overcurrent flag assertions  
• Individual open-drain fault flag pins with transient filter  
• 3V/5V-compatible enable inputs  
• Active-high (-1) and active-low (-2) versions  
• Reverse-current blocking in off mode (no “body diode”)  
• Soft-start circuit  
• 100µA maximum on-state supply current  
• <1µA typical off-state supply current  
• –40°C to 85°C operation  
Soft start eliminates the momentary voltage droop on other  
ports that may occur when the switch is enabled in bus-  
powered applications. Additional features include thermal  
shutdown to prevent catastrophic switch failure from high-  
current loads and 3.3V and 5V logic compatible enable  
inputs.  
Applications  
• USB keyboard bus-powered hubs  
• USB bus-powered docking stations  
• Note Book PCs  
The MIC2536 is available in active-high and active-low ver-  
sions in 8-lead SOP and MSOP.  
• PDAs  
• General purpose power distribution applications  
• PC board hot swap  
• Inrush current-limiting  
Typical Application  
Ferrite  
Beads  
10k  
4.50V to 5.25V  
Upstream VBUS  
100mA max.  
VBUS  
1.5k  
10k  
D+  
3.3V USB Controller  
MIC2536-2  
MIC5207-3.3  
USB  
Port 1  
.01µF  
.01µF  
D–  
VBUS  
D+  
63µF  
0.1µF  
VIN  
IN  
OUT  
ON/OFF  
ENA  
OUTA  
IN  
GND  
OVERCURRENT  
OVERCURRENT  
ON/OFF  
FLGA  
FLGB  
ENB  
1µF  
D–  
GND  
GND  
OUTB  
VBUS  
D+  
GND  
4.7µF  
USB  
Port 2  
D–  
63µF  
GND  
Data  
Data  
(Two Pair)  
to USB  
Controller  
Typical Two-Port Bus-Powered Hub  
UL Recognized Component  
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com  
March 2000  
1
MIC2536  
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