MP5505A 2.7-7V, 4A High-Efficiency Energy Storage and Management Unit QFN-20

MP5505A 2.7-7V, 4A High-Efficiency Energy Storage and Management Unit QFN-20

The MP5505A is a lossless energy storage and management unit targeted at solid-state and hard-disk drive applications.

Key Specifications

Features

• Wide 2.7V to 7V Operating Input Range
• Input Current Limiter with Integrated 50mΩ MOSFET
• Up to 4.5A Input Current Limit
• Reverse-Current Protection
• 6V Bus Clamping Voltage
• Power-On-Reset
• Adjustable dv/dt Slew Rate for Bus Voltage Start-Up
• Internal 30mΩ Disconnect Switch
• Internal 70mΩ and 60mΩ Power Switches for Energy Storage and Release Management Circuits
• Thermal Protection

Typical Application Circuit

Applications

• Solid-State Drives
• Hard-Disk Drives

Design Notes

• Rail sequencing order and delay are part of the SoC power-up contract; a wrong order latches the processor even though every rail is in spec.
• In multiphase designs, current balance depends on the loop matching between phases, so keep the layout symmetric.
• Digital interfaces (PMBus, I²C) need pull-ups to the correct rail and a defined state during power-up.
• Thermal design is a system problem here: the PMIC sits next to the load it feeds, so budget the shared copper, not the package alone.

Common Questions