MPQ4470A 5A, 100kHz Step-Down Converter QFN20

MPQ4470A 5A, 100kHz Step-Down Converter QFN20

Key Specifications

Features

• Wide 4.5V-to-36V Operating Input Range
• Guaranteed 5A, Continuous Output Current
• Internal 40mΩ High-Side, 20mΩ Low-Side Power MOSFETs
• Proprietary Switching-Loss-Reduction Technology
• 1% Reference Voltage
• Programmable Soft-Start Time
• Low Drop-out Mode
• 100kHz-to-1MHz Switching Frequency
• SCP, OCP, OVP Latch (MPQ4470 only), UVP, and Thermal Shutdown
• Output Adjustable from 0.8V to 0.9×VIN

Applications

• Notebook Systems and I/O Power
• Automotive Systems
• Networking Systems
• Industrial Supplies
• Optical Communications Systems

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 QFN20 — check the land pattern in the datasheet before layout.

Common Questions