NB685A 4.5-28V, 12A Synchronous Buck Converter QFN-16

NB685A 4.5-28V, 12A Synchronous Buck Converter QFN-16

Key Specifications

Features

• Wide 4.5 V to 28 V Operating Input Range
• Compatible for IMVP8
• 135 μA Low Quiescent Current
• 12 A Continous Output Current
• 13 A Peak Output Current
• Selectable Ultrasonic Mode
• Selectable 500 k/700 k Switching Frequency
• Built-in +/- 1 A VTTLDO
• 1% Buffered VTTREF Output
• Adaptive COT for Fast Transient

Applications

• Laptop Computers
• Networking 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.
• Package QFN-16 — check the land pattern in the datasheet before layout.

Common Questions