MP5479 2.7-5.5V to 5.5V PMIC QFN-26

MP5479 2.7-5.5V to 5.5V PMIC QFN-26

The MP5479 is a complete power management solution that integrates four high-efficiency step- down DC/DC converters, five low-dropout regulators, and a flexible logic interface.

Key Specifications

Features

• Low-Dropout Regulators: o One Dedicated RTC LDO o Four Low-Noise LDOs o Two Separate Input Power Supplies o 50mV Dropout at 300mA Load

Typical Application Circuit

Applications

• Infotainment
• Video Recorders

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