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MIC2527-2BWM PDF预览

MIC2527-2BWM

更新时间： 2024-09-19 22:11:31
品牌 Logo 应用领域
麦瑞 - MICREL 开关光电二极管
页数 文件大小 规格书
12页 102K
描述
Quad USB Power Control Switch Not Recommended for New Designs

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中文翻译

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MIC2527-2BWM 数据手册

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MIC2524/2527  
Quad USB Power Control Switch  
Not Recommended for New Designs  
Refer to MIC2027  
General Description  
Features  
The MIC2524 and MIC2527 are cost-effective high-side  
power switches with four independently controlled channels,  
optimized for self-powered and bus-powered Universal Se-  
rial Bus (USB) applications. Few external components are  
necessary to satisfy USB requirements.  
• Compliant to USB specifications  
• UL Recognized Component  
• 4 independent switches  
• 3V to 5.5V input  
• 500mA minimum continuous load current per port  
• 140mΩ maximum on-resistance (MIC2524)  
• 1.25A maximum short circuit current limit  
• Individual open-drain fault flag pins  
• 220µA on-state supply current  
• 1µA typical off-state supply current  
• Output can be forced higher than input (off-state)  
• Thermal shutdown  
• 2.4V typical undervoltage lockout (UVLO)  
• 1ms turn-on (soft-start) and fast turnoff  
• Active-high or active-low enable versions  
• 16-pin SOIC and DIP packages  
The MIC2524/7 satisfies the following USB requirements:  
each switch channel supplies up to 500mA as required by  
USB downstream devices; the switch’s low on-resistance  
meets USB voltage drop requirements; fault current is limited  
to typically 750mA, well below the UL 25VA safety require-  
ments; and a flag output is available to indicate fault condi-  
tions to the local USB controller. Soft start eliminates the  
momentaryvoltagedropontheupstreamportthatmayoccur  
when the switch is enabled in bus-powered applications.  
Additional features include thermal shutdown to prevent  
catastrophic switch failure from high-current loads,  
undervoltage lockout (UVLO) to ensure that the device re-  
mains off unless there is a valid input voltage present, and  
3.3V and 5V logic compatible enable inputs.  
Applications  
• USB bus-powered hubs  
• USB self-powered hubs  
• USB monitors  
The MIC2524/7 is available in active-high and active-low  
versions in 16-pin DIP and SOIC packages.  
• USB printers  
Typical Application  
MIC2527  
5.1V ± 3%  
5V ± 1%  
or  
Ferrite  
Bead  
MIC2524  
VBUS  
10k  
5V ±3%  
27k  
Downstream  
USB  
MIC5207-3.3  
LDO Regulator  
D+  
D–  
MIC2524  
MIC2527  
33µF*  
3.3V USB Controller  
0.01µF  
0.01µF  
0.01µF  
0.01µF  
Port 1  
IN  
V+  
OVERCURRENT  
IN  
OUT  
ON/OFF  
ENA  
500mA max.  
GND  
1µF  
FLGA  
ENB  
IN  
4.7  
µF  
GND  
0.1  
µF  
OUTA  
VBUS  
D+  
FLGB  
ENC  
OUTB  
OUTC  
Downstream  
USB  
Port 2  
500mA max.  
33µF*  
33µF*  
33µF*  
D+  
D–  
D–  
FLGC OUTD  
GND  
GND  
END  
GND  
GND  
FLGD  
VBUS  
D+  
Bold lines indicate  
0.1" wide, 1-oz. copper  
high-current traces.  
Downstream  
USB  
Port 3  
500mA max.  
D–  
GND  
* 33µF, 16V tantalum or 100µF, 10V electrolytic per port  
VBUS  
D+  
Downstream  
USB  
Port 4  
500mA max.  
D–  
GND  
4-Port Self-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  
June 1999  
1
MIC2524/2527  
1234567...12

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