MP5099 12V Dual-Channel Current Limit Switch QFN-10

MP5099 12V Dual-Channel Current Limit Switch QFN-10

The MP5099 is a protection device that protects circuitry on the output from transients on the input.

Key Specifications

Features

• Integrated 5V/12V Input Dual E-Fuse
• Up to 24V/100ms Maximum Input Voltage (VIN) Surge Tolerance for 12V VIN Channel
• Up to 16V/100ms Maximum VIN Surge Tolerance for 5V VIN Channel
• Integrated, Dual-Channel Current Limit Switch
• Low 40mΩ On Resistance (RDS(ON)) for 12V VBUS and 5V VBUS Current Limit Switch
• 150μA Typical Low Quiescent Current (IQ) for 12V VIN Channel and 130μA Low IQ for 5V VIN Channel
• Configurable Soft-Start Time (tSS)
• Fixed 4A Trip and 2.95A Hold Current Limit for 12V VIN Channel
• Fixed 3A Trip and 2.2A Hold Current Limit for 5V VIN Channel
• Reverse Current Protection for 5V VIN Channel

Typical Application Circuit

Applications

• Hard Disk Drives (HHDs)
• Solid-State Drives (SSDs)

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