MPQ8785 3.1-16V, 40A Synchronous Step-Down Converter LGA-37

MPQ8785 3.1-16V, 40A Synchronous Step-Down Converter LGA-37

Key Specifications

Features

• PMBus 1.3 Compliant
• Scalable Multi-Phase Operation
• 3.1V to 16V Input Voltage (VIN) with External 3.3V VCC Bias
• Continuous 40A of Output Current (IOUT)
• Phase Redundancy to Ensure Uninterrupted Operation
• Lossless and Accurate On-Die Current Sensing with Auto-Matching FEATURES (continued)
• Accurate Current Balance Control in Multi- Phase Operation
• Quiet SwitcherTM Technology (QST) to Mitigate Switching Noise
• Fault Recording (BBOX) to Ease Failure Analysis
• Automatic PMBus Address Assignment to Provide Auxiliary Phase Data Reading

Applications

• Telecom and Networking Systems
• Base Stations

Design Notes

• The step-down topology needs an inductor and output capacitor sized for the ripple at the switching frequency, not just the DC load.
• Keep the input loop short — high di/dt at the switch node sets conducted EMI.
• Power switches are integrated, so the thermal path is the PCB copper under the pad.
• Package LGA-37 — check the land pattern in the datasheet before layout.

Common Questions