MP5099E 12V Dual-Channel Current-Limit Switch QFN-10

MP5099E 12V Dual-Channel Current-Limit Switch QFN-10

The MP5099E 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
• 24V/100ms Maximum Surge Input Voltage (VIN1) Tolerance for 12V Bus (Channel 1)
• 16V/100ms Maximum Surge VIN2 Tolerance for 5V Bus (Channel 2)
• Integrated Dual-Channel Current-Limit Switch
• 40mΩ/40mΩ Low On Resistance (RDS(ON)) for Channel 1/2 Current-Limit Switch
• 316μA/355μA Typical Low Quiescent Current (IQ) for Channel 1/2
• Configurable Soft-Start Time (tSS)
• Fixed 4A/2.95A Trip/Hold Current Limit for Channel 1
• Fixed 3A/2.2A Trip/Hold Current Limit for Channel 2
• Reverse Current Protection for Channel 2

Typical Application Circuit

Applications

• Hard Disk Drives (HDDs)
• 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