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MAX5948A_11

更新时间： 2024-11-19 11:16:23
品牌 Logo 应用领域
美信 - MAXIM 控制器
页数 文件大小 规格书
18页 183K
描述
-48V Hot-Swap Controllers with External RSENSE

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MAX5948A_11 数据手册

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19-3473; Rev 1; 8/11  
-48V Hot-Swap Controllers  
with External R  
SENSE  
/MAX5948B  
General Description  
Features  
o Allow Safe Board Insertion and Removal from a  
The MAX5948A/MAX5948B are hot-swap controllers  
that allow a circuit card to be safely hot plugged into a  
live backplane. The MAX5948A/MAX5948B operate  
from -20V to -80V and are well-suited for -48V power  
systems. The MAX5948A is pin- and function-compati-  
ble with both the LT1640AL and LT1640L. The  
MAX5948B is pin- and function-compatible with both  
the LT1640AH and LT1640H.  
Live -48V Backplane  
o Pin- and Function-Compatible with  
LT1640AL/LT1640L (MAX5948A)  
o Pin- and Function-Compatible with  
LT1640AH/LT1640H (MAX5948B)  
o Withstand -100V Input Transients with No  
The MAX5948A/MAX5948B provide a controlled turn-on  
to circuit cards preventing glitches on the power-supply  
rail and damage to board connectors and components.  
The MAX5948A/MAX5948B provide undervoltage, over-  
voltage, and overcurrent protection. These devices  
ensure the input voltage is stable and within tolerance  
before applying power to the load.  
External Components  
o Operate from -20V to -80V  
o Programmable Inrush and Short-Circuit Current  
Limits  
o Programmable Overvoltage Protection  
o Programmable Undervoltage Lockout  
o Power Up into a Shorted Load  
Both the MAX5948A and MAX5948B protect a system  
against overcurrent and short-circuit conditions by turning  
off the external MOSFET in the event of a fault condition.  
o Power-Good Control Output  
Both devices feature an open-drain power-good status  
output, PWRGD for MAX5948A or PWRGD for  
MAX5948B, that can be used to enable downstream  
converters.  
Ordering Information  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
8 SO  
MAX5948AESA+  
MAX5948BESA+  
The MAX5948A/MAX5948B are available in an 8-pin SO  
package. Both devices are specified for the extended  
-40°C to +85°C temperature range.  
8 SO  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
Applications  
Selector Guide  
Central-Office Switching  
Network Switches/Routers  
Server Line Cards  
PART  
PWRGD POLARITY  
Active Low (PWRGD)  
Active High (PWRGD)  
MAX5948AESA  
MAX5948BESA  
Base-Station Line Cards  
Pin Configuration  
TOP VIEW  
PWRGD  
(PWRGD)  
1
2
3
4
8
7
6
5
V
DD  
OV  
UV  
DRAIN  
GATE  
MAX5948A  
MAX5948B  
V
SENSE  
EE  
SO  
( ) FOR MAX5948B.  
Typical Operating Circuit appears at end of data sheet.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,  
or visit Maxim’s website at www.maxim-ic.com.  
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