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硅天下科技-hot-swap controllers-MAX5902, MAX5903
The MAX5902/MAX5903 are hot-swap controllers that allow a circuit card to be safely hot plugged
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MAX5902, MAX5903
概述
The MAX5902/MAX5903 are hot-swap controllers that allow a circuit card to be safely hot plugged into a live backplane without causing a glitch on the power-supply rail. These devices operate from +9V to +72V and provide the simplest hot-swap solution by eliminating all external components except the external p-channel MOSFET.
The MAX5902/MAX5903 limit the inrush current to the load and provide a circuit-breaker function for overcurrent protection. During startup the circuit-breaker function is disabled and the MAX5902/MAX5903 limit the inrush current by gradually turning on the external MOSFET. Once the external MOSFET is fully enhanced, the circuit-breaker function is enabled and the MAX5902/MAX5903 provide overcurrent protection by monitoring the voltage drop across the external MOSFET's on-resistance.
The MAX5902/MAX5903 include an undervoltage lockout (UVLO) function, ON/active-low OFF control input, and a power-good status output, active-low PGOOD (MAX5902) or PGOOD (MAX5903). A built-in thermal shutdown feature is also included to protect the external MOSFET in case of overheating.
The MAX5902/MAX5903 offer latched or autoretry fault management and are available with 300mV, 400mV or 500mV circuit-breaker thresholds. Both the MAX5902 and MAX5903 are available in small SOT23 and TDFN packages, and are specified for the extended -40°C to +85°C temperature range. For specific ordering information, see the Selector Guide at the end of the data sheet.
關(guān)鍵特性
Wide +9V to +72V Operation
Requires No External Sense Resistor
Drives External p-Channel MOSFET
Limits Inrush Current
Circuit-Breaker Function
Less than 2mA Quiescent Current
ON/Active-Low OFF Input Permits Load Power-Supply Control and Sequencing
Adjustable Undervoltage Lockout
Power-Good Output with +72V Rating
Latching or Automatic Retry Fault Management
Thermal Shutdown Helps Protect the External MOSFET
Available in Two Small Packages
6-Pin TDFN and SOT23
應(yīng)用/使用
基站線卡?工業(yè)系統(tǒng)?網(wǎng)絡(luò)集線器、交換機(jī)和路由器?網(wǎng)絡(luò)集線器、交換機(jī)和路由器?RAID?服務(wù)器負(fù)責(zé)人：張超
手機(jī):137 2421 2401 QQ：820270087 郵箱：820270087@qq.com
