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MAX5943AEEE+T

更新时间: 2024-11-23 13:10:39
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美信 - MAXIM 开关控制器
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20页 930K
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MAX5943AEEE+T 数据手册

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19-3378; Rev 0; 8/04  
FireWire Current Limiter and Low-Drop  
ORing Switch Controller  
General Description  
Features  
Provides Safe Hot Swap for 7.5V to 37V Power  
The MAX5943 is a fully integrated power-management  
®
IC for FireWire applications. This device controls two  
Supplies  
external power n-channel MOSFETs to regulate current  
from the input power supply to the load and performs  
low-voltage-drop, power-supply ORing. The MAX5943  
operates over a 7.5V to 37V input range and provides  
inrush and output current limit in addition to a diode  
ORing function suitable for FireWire applications.  
Low-Drop Power ORing with Ultra-Fast Turn-Off  
Programmable Active Current Limit (MAX5943A)  
Programmable Circuit Breaker  
(MAX5943B–MAX5943E)  
The MAX5943 allows the safe insertion and removal of  
FireWire peripherals into a live FireWire port by providing  
inrush current control and an output current-limiting func-  
tion. The ORing feature provides a very efficient way to  
protect the FireWire port when connected to another  
FireWire peripheral that sources a higher voltage. By turn-  
ing off both external MOSFETS, the MAX5943 provides a  
true bidirectional load disconnect. A low-current shut-  
down mode disables the MAX5943, resulting in less than  
10µA supply current. A pin-selectable input allows  
latched or autoretry fault management after a fault.  
±5% Current-Limit Sensing Accuracy  
Programmable Current-Limit/Circuit-Breaker  
Timeout  
Fast Current-Limit Response to Output Short-  
Circuit Conditions (MAX5943A)  
Drives External N-Channel Power MOSFETs  
Overcurrent Fault Status Output  
Latched or Autoretry Overcurrent Fault  
Management  
The MAX5943A features a current-limit function that  
actively limits the current drawn by the load with a pro-  
grammable timeout. The MAX5943B–MAX5943E do not  
actively limit the load current but provide a circuit-breaker  
function. See the Selector Guide for the default and pro-  
grammable circuit-breaker timeouts.  
10µA Shutdown Current  
ON/OFF Control Allows Undervoltage Lockout  
Programming  
Fast Load Disconnect Control Through ON Input  
The MAX5943 operates over the -40°C to +85°C extended  
temperature range and is available in a 16-pin QSOP  
package.  
Ordering Information  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
16 QSOP  
MAX5943AEEE  
MAX5943BEEE  
MAX5943CEEE  
MAX5943DEEE  
MAX5943EEEE  
Applications  
16 QSOP  
FireWire Desktop/Notebook Port  
FireWire Peripheral Device Current Limit  
FireWire Hub  
16 QSOP  
16 QSOP  
16 QSOP  
Hot Swap  
Pin Configuration  
TOP VIEW  
ON  
1
2
3
4
5
6
7
8
16 IN  
FAULT  
TIM  
15 SENSE  
14 GATE1  
ILIM  
MAX5943  
13 N.C.  
12 GATE2  
11 OUT  
10 N.C.  
LATCH  
OR_ADJ  
N.C.  
Typical Operating Circuit and Selector Guide appear at end  
of data sheet.  
ONQ1  
9
GND  
QSOP  
FireWire is a registered trademark of Apple Computers, Inc.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  

MAX5943AEEE+T 替代型号

型号 品牌 替代类型 描述 数据表
MAX5943AEEE+ MAXIM

完全替代

暂无描述
MAX5943AEEE-T MAXIM

完全替代

Power Supply Support Circuit, Adjustable, 1 Channel, BICMOS, PDSO16, 0.150 INCH, 0.025 INC

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