Maxim MAX5903LBEUT

Контроллер горячей замены1Неисправность с защелкой, тепловой предел, UVLO

Overview

The MAX5902/MAX5903LBEUT 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/MAX5903LBEUT 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/MAX5903LBEUT 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/MAX5903LBEUT provide overcurrent protection by monitoring the voltage drop across the external MOSFET's on-resistance. The MAX5902/MAX5903LBEUT 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/MAX5903LBEUT offer latched or autoretry fault management and are available with 300mV, 400mV or 500mV circuit-breaker thresholds. Both the MAX5902 and MAX5903LBEUT 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.

Features

Simple Swapper™ Series
Bulk Package
Hot Swap Controller Type
1 Number of Channels
Both Internal Switch(s)
Networking Applications
Latched Fault, Thermal Limit, UVLO Features
Circuit Breaker, Current Limit, Latched Fault, Thermal Limit, UVLO Programmable Features
9V ~ 72V Voltage - Supply
1 mA Current - Supply
Surface Mount Mounting Type