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MAX1693

更新时间： 2024-09-14 22:57:59
品牌 Logo 应用领域
美信 - MAXIM 开关
页数 文件大小 规格书
8页 144K
描述
USB Current-Limited Switches with Fault Blanking

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中文翻译

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MAX1693 数据手册

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19-1518; Rev 0; 9/99  
USB Current-Limited Switches  
with Fault Blanking  
3/MAX1694  
General Description  
Features  
The MAX1693/MAX1694 are current-limited, 60mΩ  
switches with built-in fault blanking. Their accurate pre-  
set current limit of 0.7A to 1.0A makes them ideally suit-  
ed for USB applications. Their low quiescent supply  
current (14µA) and shutdown current (1µA) conserve  
battery power in portable applications. The MAX1693/  
MAX1694 operate with inputs from +2.7V to +5.5V,  
making them ideal for both +3V and +5V systems.  
♦ Accurate Current Limit (0.7A min, 1.0A max)  
♦ Guaranteed 0.75A Short-Circuit Protection  
♦ 10ms Internal Fault-Blanking Timeout  
♦ No Fault Signal During Power-Up  
♦ Latched FAULT Output Turns Off Power Switch  
(MAX1694)  
A fault signal notifies the microprocessor that the inter-  
nal current limit has been reached. A 10ms fault-blank-  
ing feature allows momentary faults (such as those  
caused when hot-swapping into a capacitive load) to  
be ignored, thus preventing false alarms to the host  
system. This fault blanking also prevents a fault signal  
from being issued when the device is powering up.  
♦ Thermal Shutdown Protection  
♦ +2.7V to +5.5V Supply Range  
♦ 14µA Supply Current  
♦ Small 10-Pin µMAX Package  
♦ UL Recognition Pending  
In the MAX1693, an output overcurrent condition caus-  
es the switch to current limit at 0.7A to 1.0A and FAULT  
to go low after the 10ms blanking period. When the  
overcurrent condition is removed, FAULT returns to its  
high-impedance state. In the MAX1694, any overcur-  
rent longer than 10ms will latch the switch open and set  
FAULT low. The latch is cleared by cycling the ON  
input or by powering up the device again. This feature  
saves power by preventing the device from thermally  
cycling on and off in case of a persistent short-circuit  
condition.  
Applications  
USB Ports and Hubs  
Notebook Computers  
Portable Equipment  
Docking Stations  
Hot Plug-In Power Supplies  
Battery-Charger Circuits  
The MAX1693/MAX1694 have several safety features to  
ensure that the USB port is protected. Built-in thermal-  
overload protection limits power dissipation and junc-  
tion temperatures. Both devices have accurate internal  
current-limiting circuitry to protect the input supply  
against overload. They are available in space-saving  
10-pin µMAX packages.  
Ordering Information  
PART  
TEMP. RANGE  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
10 µMAX  
MAX1693EUB  
MAX1694EUB  
10 µMAX  
Typical Operating Circuit  
Pin Configuration  
INPUT  
+2.7V TO +5.5V  
IN  
OUT  
OUTPUT  
TOP VIEW  
MAX1693  
MAX1694  
IN  
OUT  
IN  
1
2
3
4
5
10 OUT  
9
8
7
6
IN  
MAX1693  
MAX1694  
FAULT  
ON  
OUT  
FAULT  
GND  
OUT  
ON  
OFF  
ON  
GND  
µMAX  
________________________________________________________________ Maxim Integrated Products  
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.  
For small orders, phone 1-800-835-8769.  
12345678

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