MP4315 3.3-45V, 5A, 350kHz Synchronous Step-Down Converter QFN-20

MP4315 3.3-45V, 5A, 350kHz Synchronous Step-Down Converter QFN-20

Key Specifications

Features

• Wide 3.3V to 45V Operating Voltage Range
• 5A Continuous Output Current
• 1.7μA Low Shutdown Supply Current
• 18μA Sleep Mode Quiescent Current
• Internal 48mΩ High-Side MOSFET and 20mΩ Low-Side MOSFET
• 350kHz to 1000kHz Configurable Switching Frequency for Car Battery Applications
• Can Be Synchronized to an External Clock
• Out-of-Phase Synchronized Clock Output
• Frequency Spread Spectrum (FSS) for Low EMI
• Symmetric VIN for Low EMI

Applications

• Battery Power Systems
• General Purpose Consumer Applications

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.
• AEC-Q100 qualification suits this part to automotive rails.
• Package QFN-20 — check the land pattern in the datasheet before layout.

Common Questions