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MAX5920BESA+ PDF预览

MAX5920BESA+

更新时间： 2024-02-15 01:05:19
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美信 - MAXIM 控制器
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19-2931; Rev 0; 8/03  
-48V Hot-Swap Controller  
with External R  
SENSE  
General Description  
Features  
The MAX5920A/MAX5920B are hot-swap controllers that  
allow a circuit card to be safely hot plugged into a live  
backplane. The MAX5920A/MAX5920B operate from  
-20V to -80V and are well-suited for -48V power systems.  
These devices are pin and function compatible with the  
LT4250 and pin compatible with the LT1640.  
ꢀ Allows Safe Board Insertion and Removal  
from a Live -48V Backplane  
ꢀ Pin- and Function-Compatible with LT4250L  
(MAX5920A)  
ꢀ Pin-Compatible with LT1640L (MAX5920A)  
The MAX5920A/MAX5920B provide a controlled turn-on  
to circuit cards preventing glitches on the power-supply  
rail and damage to board connectors and components.  
The MAX5920A/MAX5920B provide undervoltage, over-  
voltage, and overcurrent protection. These devices  
ensure the input voltage is stable and within tolerance  
before applying power to the load.  
ꢀ Pin- and Function-Compatible with LT4250H  
(MAX5920B)  
ꢀ Pin-Compatible with LT1640H (MAX5920B)  
ꢀ Circuit-Breaker Immunity to Input Voltage Steps  
and Current Spikes  
ꢀ Withstands -100V Input Transients with No  
Both the MAX5920A and MAX5920B protect a system  
against overcurrent and short-circuit conditions by turn-  
ing off the external MOSFET in the event of a fault con-  
dition. The MAX5920A/MAX5920B also provide  
protection against input voltage steps. During an input  
voltage step, the MAX5920A/MAX5920B limit the cur-  
rent drawn by the load to a safe level without turning off  
power to the load.  
External Components  
ꢀ Programmable Inrush and Short-Circuit Current  
Limits  
ꢀ Operates from -20V to -80V  
ꢀ Programmable Overvoltage Protection  
ꢀ Programmable Undervoltage Lockout  
ꢀ Powers Up into a Shorted Load  
Both devices feature an open-drain power-good status  
output (PWRGD for the MAX5920A or PWRGD for the  
MAX5920B) that can be used to enable downstream  
converters. A built-in thermal-shutdown feature is also  
included to protect the external MOSFET in case of  
overheating.  
ꢀ Power-Good Control Output  
ꢀ Thermal Shutdown Protects External MOSFET  
The MAX5920A/MAX5920B are available in an 8-pin SO  
package. Both devices are specified for the extended  
-40°C to +85°C temperature range.  
Ordering Information  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
8 SO  
Applications  
MAX5920AESA  
MAX5920BESA  
Telecom Line Cards  
8 SO  
Network Switches/Routers  
Central-Office Line Cards  
Server Line Cards  
Pin Configuration  
TOP VIEW  
Base-Station Line Cards  
PWRGD  
1
2
3
4
8
7
6
5
V
DD  
(PWRGD)  
OV  
DRAIN  
GATE  
Typical Operating Circuit and Selector Guide appear at end  
of data sheet.  
MAX5920A  
MAX5920B  
UV  
V
SENSE  
EE  
SO  
( ) FOR MAX5920B.  
________________________________________________________________ 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.  
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MAX5920BESA+ 替代型号

型号 品牌 替代类型 描述 数据表
MAX5920AESA+T MAXIM

完全替代

 Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PDSO8, 0.150 INCH, ROHS COMPLIANT,
MAX5920BESA+T MAXIM

完全替代

 Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PDSO8, 0.150 INCH, ROHS COMPLIANT,

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