MP5921 4-16V, 50A Hot-Swap Intelli-Fuse Solution QFN-28

MP5921 4-16V, 50A Hot-Swap Intelli-Fuse Solution QFN-28

The MP5921 is a monolithic, integrated controller and switch that contains a high-side MOSFET and other circuitries that enable it to work in standalone operation or to be controlled by a hot-swap controller.

Key Specifications

Features

• 4V to 16V Operating Input Range
• Maximum 50A Output Current
• Supports 60A of Output Current with Air Flow
• Integrated Switch with 1mΩ RDS(ON)
• Built-In MOSFET Driver
• 3.0V LDO Output
• Integrated Current Sensing with Sense Output
• Separate Current Sensing Output Used to Program Over-Current Value
• Built-In Insertion Delay
• Adjustable Soft Start (SS)

Typical Application Circuit

Applications

• Hot Swap
• PC Cards
• Disk Drives

Design Notes

• The current-limit threshold must stay inside the SOA of the pass device at the applied voltage, including startup inrush.
• Hot-swap inrush control is set by the slew rate on the gate or the dV/dt capacitor — too fast trips the upstream supply.
• Reverse-current blocking behaviour differs between ideal-diode and load-switch topologies; pick the one that matches the fault you are protecting against.
• Route the fault flag to a pin the firmware actually polls; a latch-off protection with no report looks like a dead board in the field.

Common Questions