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MAX4987AE

更新时间： 2024-11-09 04:41:55
品牌 Logo 应用领域
美信 - MAXIM 控制器
页数 文件大小 规格书
10页 195K
描述
Overvoltage-Protection Controller with USB ESD Protection

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MAX4987AE 数据手册

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19-1059; Rev 0; 11/07  
Overvoltage-Protection Controller  
with USB ESD Protection  
/MAX4987BE  
General Description  
Features  
The MAX4987AE/MAX4987BE are overvoltage protection  
devices with built-in ESD protection for USB data lines.  
o Input Voltage Protection Up to +28V  
o Integrated Low R (100mΩ) nFET Switch  
ON  
These devices feature a low 100mΩ (typ) R  
internal  
ON  
o Internal Overcurrent Protection 1.5A (min)  
o Overcurrent Protection (Autoretry)  
o Enable Input  
nFET switch and protect low-voltage systems against volt-  
age faults up to +28V. When the input voltage exceeds  
the overvoltage threshold or decreases below the under-  
voltage threshold, the internal nFET switch is turned off to  
prevent damage to the protected components.  
o Internal 30ms Startup Delay  
o Low-Capacitance USB High-Speed Data Line ESD  
Protection (3pF)  
All switches feature a minimum 1.5A current-limit pro-  
tection. During a short-circuit occurrence, the switch  
operates in an autoretry mode where the internal nFET  
switch is turned on to check if the fault has been  
removed. The autoretry interval is 30ms, and if the fault  
is removed, the nFET switch remains on.  
15ꢀV Human Body ꢁodel  
15ꢀV IECꢂ1000-ꢃ-2 Air ꢄap  
ꢂꢀV IECꢂ1000-ꢃ-2 Contact  
o Thermal-Shutdown Protection  
The MAX4987AE/MAX4987BE feature low-capacitance  
(3pF) ESD protection for USB data lines that allow  
transmission of high-speed USB 2.0 signals.  
o 2mm x 3mm, 8-Pin TDFN Pacꢀage  
Pin Configuration  
The overvoltage threshold (OVLO) is preset to 6.15V.  
The undervoltage thresholds (UVLO) are preset to 2.55V  
(MAX4987AE) or 4.2V (MAX4987BE). When the input  
voltage drops below the undervoltage (UVLO) thresh-  
old, the devices enter a low-current standby mode.  
TOP VIEW  
V
OUT ACOK EN  
CC  
5
8
7
6
All devices are offered in a small 2mm x 3mm, 8-pin  
TDFN package and operate over the -40°C to +85°C  
extended temperature range.  
Applications  
MAX4987AE/  
MAX4987BE  
Cell Phones  
Media Players  
*EP  
4
1
2
3
IN  
CD+ GND CD-  
Typical Operating Circuit appears at end of data sheet.  
*CONNECT EXPOSED  
PAD TO GND.  
TDFN-EP  
2mm x 3mm  
Ordering Information/Selector Guide  
PIN-  
PACKAꢄE  
PACKAꢄE  
OVERCURRENT  
PART  
TOP ꢁARK  
UVLO (V)  
OVLO (V)  
CODE  
T823-1  
T823-1  
ꢁODE  
ꢁAXꢃ987AEETA+  
ꢁAXꢃ987BEETA+*  
8 TDFN-EP**  
8 TDFN-EP**  
AAI  
2.55  
4.2  
6.15  
6.15  
Autoretry  
Autoretry  
AAJ  
Note: All devices are specified over the -40°C to +85°C operating temperature range.  
+Denotes a lead-free package.  
*Future product—contact factory for availability.  
**EP = Exposed paddle.  
________________________________________________________________ ꢁaxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact ꢁaxim Direct at 1-888-ꢂ29-ꢃꢂꢃ2,  
or visit ꢁaxim’s website at www.maxim-ic.com.  
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