MP5018 4.5-5.5V 5V, 1A-5A Current Limit Switch QFN12

MP5018 4.5-5.5V 5V, 1A-5A Current Limit Switch QFN12

The MP5018 is a protection device designed to protect circuitry on the output from transients on input (VCC).

Key Specifications

Features

• SAS Disable to support DEVSLP or POWER_DOWN
• 4.5V to 5.5V Continued Operating Input Range
• 16V Absolute Maximum Input Voltage
• 5.8V Fast OVP Response
• Reverse Current Blocking
• Integrated 45mΩ Power FET
• Adjustable Current-Limit or Fixed Current Limit when floating ILIMIT pin
• 210μA Typical Low Quiescent Current
• Adjustable Soft Start time
• Fault Indication

Typical Application Circuit

Applications

• HDD, SSD
• Hot Swap Systems
• Set-top Boxes/Smart TV
• PCIe 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