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MIC2537-1BMTR PDF预览

MIC2537-1BMTR

更新时间: 2024-09-20 15:42:51
品牌 Logo 应用领域
美国微芯 - MICROCHIP 光电二极管
页数 文件大小 规格书
12页 83K
描述
Power Supply Support Circuit, Fixed, 4 Channel, PDSO16, SOP-16

MIC2537-1BMTR 数据手册

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MIC2537  
Quad Power Distribution Switch  
Final Information  
General Description  
Features  
The MIC2537 is a cost-effective high-side power switch with  
four independently controlled channels, optimized for bus-  
poweredUniversalSerialBus(USB)applications. Fewexter-  
nal components are necessary to satisfy USB requirements.  
Compliant to USB specifications  
3V to 5.5V input  
100mA minimum continuous load current per port  
425mtypical on-resistance  
< 400mA current limit  
Individual open-drain fault flag leads  
3V/5V-compatible enable inputs  
Active-high (-1) and active-low (-2) versions  
100µA max. on-state supply current  
<1µA typical off-state supply current  
16-lead SOP package  
TheMIC2537satisfiesthefollowingUSBrequirements:each  
switch channel supplies up to 100mA as required by USB  
bus-powered downstream devices; fault current is limited to  
typically 250mA, 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.  
• –40°C to 85°C operation  
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 keyboards  
The MIC2537 is available in active-high and active-low ver-  
sions in a 16-lead SOP package.  
USB bus-powered docking stations  
Notebook docking stations  
Notebook PCs  
PDA  
General power distribution  
Typical Application  
Upstream VBUS  
4.75V to 5.25V  
500mA max.  
Ferrite  
Bead  
VBUS  
10k  
10k 10k 10k  
Downstream  
MIC5207-3.3  
D+  
D–  
33µF*  
USB  
3.3V USB Controller  
LDO Regulator  
MIC2537  
0.01µF  
0.01µF  
0.01µF  
0.01µF  
Port 1  
100mA max.  
IN  
V+  
EN  
OC  
EN  
OC  
EN  
IN  
OUT  
ENA  
GND  
1µF  
FLGA  
ENB  
NC  
4.7  
µF  
GND  
0.1  
µF  
OUTA  
VBUS  
D+  
FLGB  
ENC  
OUTB  
OUTC  
Downstream  
USB  
Port 2  
100mA max.  
33µF*  
33µF*  
33µF*  
D+  
D–  
FLGC OUTD  
OC  
EN  
OC  
D–  
GND  
END  
NC  
FLGD  
GND  
Bold lines indicate  
0.1" wide, 1-oz. copper  
high-current traces.  
GND  
VBUS  
D+  
Downstream  
USB  
Port 3  
100mA max.  
D–  
* 33µF, 16V tantalum or 100µF, 10V electrolytic per port  
GND  
VBUS  
D+  
Downstream  
USB  
D–  
Port 4  
100mA max.  
GND  
Typical 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  
December 1999  
1
MIC2537  

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