MP5017A 3-5.5V, 1A to 5A Current Limit Switch QFN-12

MP5017A 3-5.5V, 1A to 5A Current Limit Switch QFN-12

The MP5017A is a protection device designed to protect circuitry on the output from transients from the input.

Key Specifications

Features

• 3V to 5.5V Continuous Operating Input Voltage (VIN) Range
• 16V Absolute Maximum VIN
• Output Discharge
• SAS/OV Disable to Support DEVSLP or POWER_DOWN
• 5.8V Fast Output OVP Response
• Reverse Current Blocking
• Integrated 45mΩ RDS(ON) Power MOSFET
• Adjustable Current-Limit through ILIMIT
• 210μA Low Quiescent Current (IQ)
• Programmable Soft-Start Time (tSS) via the DV/DT Pin

Typical Application Circuit

Applications

• HDDs and SSDs
• Hot Swap Devices
• Wireless Modem Data Cards
• PC Cards

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