MPS MP5520 is a power loss protection management IC designed for high-efficiency power management in enterprise and datacenter solid-state drives (SSDs). It integrates multiple functions in a compact monolithic converter to ensure reliable operation during power interruptions — making it suitable for systems that need robust energy hold-up and protection.

　　Key Features & Description

　　1.Wide Input Voltage Range

　　• Designed to operate from 2.7 V up to 16 V.

　　2.Integrated Dual E-Fuses (Current-Limit Switches)

　　• Provides two input current-limit switches (“e-fuses”) with low on-resistance (RDS(ON)).

　　• Each e-fuse limits input current and blocks reverse current, protecting the system against voltage faults.

　　3.Bidirectional Buck-Boost Converter

　　• Manages energy storage and delivery between the input and backup storage capacitors.

　　• Increases (boosts) or decreases (bucks) voltage as needed to maintain power during an input source loss.

　　• Only one external inductor is required, keeping solution size small.

　　4.Energy Storage & Hold-Up Support

　　• Backup energy is stored in high-voltage capacitors.

　　• During a power loss, the bidirectional converter releases stored energy to the system, maintaining operation through a controlled hold-up time.

　　5.Power-Sharing Converter

　　• A separate bidirectional converter allows power sharing between the e-fuses.

　　• Configurable modes include boost power-sharing and buck power-sharing.

　　6.Monitoring & Reliability Features

　　• Internal ADC monitors input voltages, currents, and power for each channel.

　　• Includes health monitoring for the storage capacitor to ensure long-term reliability.

　　7.Soft-Start Function

　　• Prevents inrush current during system start-up.

　　8. Compact Package

　　• Available in a QFN-37 (5 mm × 6 mm) package.

　　Typical Applications

　　• Enterprise SSD power management

　　• Datacenter storage systems

　　• Backup power protection circuits

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