MP5455 2.7-7V Peak Power Assist QFN-20

MP5455 2.7-7V Peak Power Assist QFN-20

The MP5455 is intelligently designed as a power storage system, releasing energy as needed during peak loading events, providing an efficient solution for smart speakers.

Key Specifications

Features

• Power Back-Up Management Circuit
• Input Current Limiter with Integrated 60mΩ MOSFET
• Wide 2.7V to 7V Operating Input Range
• Up to 4.5A Input Current Limit
• Reverse-Current Protection
• Adjustable dV/dt Slew Rate for Bus Voltage Start-Up
• Over-Temperature Protection (OTP)
• Available in a QFN-20 (3mmx4mm) Package

Typical Application Circuit

Applications

• Peak Power Smoother for Smart Speakers
• Artificial Intelligence (AI)-Enabled Speakers
• Power Back-Up

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