MAX5938LEEE

Hot Swap Controllers Overview

The MAX5938LEEE+T is a hot-swap controller designed for -10V to -80V rails, enabling safe insertion of circuit line cards into live backplanes without power supply glitches. It integrates an adjustable circuit-breaker function eliminating the need for an external sense resistor (RSENSE). The device features Load Probe technology to detect short circuits before startup and limits inrush current by gradually enhancing an external MOSFET. It provides overcurrent and short-circuit protection by monitoring the external MOSFET's RDS(on) voltage drop. The part includes a 400mA fast gate pulldown for rapid shutdown during faults and protects against input voltage steps. It offers latched fault management, on/off control, selectable PGOOD polarity, and UV/OV protection in a 16-pin QSOP package.

Hot Swap Controllers Feature Summary

• Integrates adjustable circuit-breaker function requiring no external sense resistor
• Performs Load Probe test to detect short circuits prior to startup
• Limits inrush current via gradual external MOSFET enhancement
• Provides input voltage step immunity without shutting down the load

Hot Swap Controllers Applications

• Servers
• Telecom line cards
• Network switches
• Solid-state circuit breakers
• Network routers

Hot Swap Controllers Procurement Notes

Verify the specific suffix 'L' indicates latched fault management mode, distinct from the 'A' autoretry variant. Confirm the package type is QSOP-16 and the temperature range is extended (-40°C to +85°C). Check current availability status as distribution may be limited or restricted. Ensure the design accounts for the 400mA gate pulldown capability when selecting the external MOSFET.

Hot Swap Controllers Selection Notes

Select this component for negative voltage rail protection where sense resistor elimination is desired. Choose the L suffix for applications requiring latched fault recovery rather than autoretry. Ensure the external MOSFET can handle the required current and voltage ratings. Verify compatibility with the system's backplane hot-plug requirements and input voltage stability.

Hot Swap Controllers Part Context

This device belongs to the MAX5938 family of hot-swap controllers. It shares core functionality with the MAX5938A but differs in fault management behavior. The L variant provides latched shutdown on fault, while the A variant offers autoretry. Both are specified for the same extended temperature range and package options.

Hot Swap Controllers Replacement Considerations

The MAX5938AEEE+T is a functional substitute within the same family but utilizes autoretry fault management instead of latched shutdown. Verify if the system design supports automatic recovery after fault clearance. Other MAX5938 variants may require external sense resistors.