MP5475 3-16V, 6A Quad-Buck PMIC QFN-35

MP5475 3-16V, 6A Quad-Buck PMIC QFN-35

The MP5475 is a complete power management IC (PMIC) that integrates four high efficiency step-down DC/DC converters and a flexible logic interface.

Key Specifications

Features

• Wide 3V to 16V Input Voltage (VINx) (where x = A, B, C, or D) Range
• Adaptive Constant-On-Time (COT) Control for Ultra-Fast Transient Response
• Buck A/B and Buck C/D Support Up to 12A of Continuous Current in Dual-Phase Mode
• 2 x 50mA Low-Dropout (LDO) Regulators
• Differential Output Voltage (VOUTx) (where x = A, B, C, or D) Remote Sense
• I2C Slave Address Configurable via the Multiple-Time Programmable (MTP) Memory
• I2C-Configurable, 0.3V to 2.048V Reference Voltage (VREF) in 2mV Steps with Slew Rate Control
• Configurable 500kHz to 2MHz Switching Frequency (fSW)
• Open-Drain Power Good (PG) Indication and General Status Interrupt
• MTP-Configurable Soft-Start (SS)/Soft Shutdown and Delay

Typical Application Circuit

Applications

• Storage and Networking
• Enterprise Solid-State Drives (SSDs)

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