Hot Swap Controller 1-CH 72V 6-Pin SOT-23 T/R

The MAX5902 is 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 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 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 include an undervoltage lockout (UVLO) function, ON/OFF control input, and a power-good status output, 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 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.

• 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/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