Hot Swap Controller 1-CH -80V 8-Pin SOIC N

The MAX5920A is hot-swap controllers that allow a circuit card to be safely hot plugged into a live backplane. The MAX5920A operate from -20V to -80V and are well-suited for -48V power systems. These devices are pin and function compatible with the LT4250 and pin compatible with the LT1640. The MAX5920A provide a controlled turn-on to circuit cards preventing glitches on the power-supply rail and damage to board connectors and components. The MAX5920A provide undervoltage, overvoltage, and overcurrent protection. These devices ensure the input voltage is stable and within tolerance before applying power to the load. Both the MAX5920A protect a system against overcurrent and short-circuit conditions by turning off the external MOSFET in the event of a fault condition. The MAX5920A also provide protection against input voltage steps. During an input voltage step, the MAX5920AX5920B limit the current drawn by the load to a safe level without turning off power to the load. Both devices feature an open-drain power-good status output (PWRGD for the MAX5920A or PWRGD for the MAX5920B) that can be used to enable downstream converters. A built-in thermal-shutdown feature is also included to protect the external MOSFET in case of overheating. The MAX5920A are available in an 8-pin SO package. Both devices are specified for the extended -40°C to +85°C temperature range.

• Allows Safe Board Insertion and Removal from a Live -48V Backplane
• Pin- and Function-Compatible with LT4250L (MAX5920A)
• Pin-Compatible with LT1640L (MAX5920A)
• Pin- and Function-Compatible with LT4250H (MAX5920B)
• Pin-Compatible with LT1640H (MAX5920B)
• Circuit-Breaker Immunity to Input Voltage Steps and Current Spikes
• Withstands -100V Input Transients with No External Components
• Programmable Inrush and Short-Circuit Current Limits
• Operates from -20V to -80V
• Programmable Overvoltage Protection
• Programmable Undervoltage Lockout
• Powers Up into a Shorted Load
• Power-Good Control Output
• Thermal Shutdown Protects External MOSFET