MP5056 Hot-Swap Protection Device QFN-22

MP5056 Hot-Swap Protection Device QFN-22

The MP5056 is a hot-swap protection device designed to protect circuitry on its output from transients on its input.

Key Specifications

Features

• 7mΩ Integrated Power MOSFET
• 5A to 15A Adjustable Current Limit (ILIMIT)
• Output Current (IOUT) Measurement
• ±10% Current Monitoring Accuracy
• Fast Response for Short Protection (200ns)
• PG Detection and FLTB Indication
• PG Asserts Low at VIN = 0V
• Damaged MOSFET Detection
• External Soft Start (SS)
• Under-Voltage Lockout (UVLO) Protection

Typical Application Circuit

Applications

• Hot Swap
• Home Appliances
• PC Cards
• Storage Devices

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