BD46391G-TR

Overview

The BD46391G-TR is a synchronous step-down DC/DC converter manufactured by Rohm Semiconductor. It integrates high-side and low-side N-channel MOSFETs to achieve high efficiency in compact designs. The device operates with an input voltage range of 2.7V to 5.5V and provides a programmable output voltage from 0.6V to 3.6V. It supports a maximum output current of 3A with a switching frequency selectable between 400kHz and 2MHz. Key protection features include overcurrent protection, thermal shutdown, and soft-start functionality.

Feature Summary

• Integrated synchronous rectification with internal high-side and low-side N-channel MOSFETs for enhanced power efficiency.
• Programmable switching frequency allows optimization for size or efficiency requirements.
• Comprehensive protection mechanisms including overcurrent detection, thermal shutdown, and controlled soft-start.
• Compact packaging solution designed for space-constrained portable electronic applications.

Applications

• Portable consumer electronics such as smartphones and tablets
• Wireless communication modules and base stations
• Industrial control systems requiring stable low-voltage power rails

Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging when ordering. Confirm the exact output voltage setting via external resistor values as defined in the electrical characteristics table. Ensure compatibility with the required input voltage range and load current specifications before integration into the final design.

Selection Notes

Select this component when a compact, high-efficiency solution is needed for inputs up to 5.5V. Consider the trade-off between switching frequency and external component size. Verify that the thermal performance meets the application's ambient temperature requirements given the integrated MOSFET structure.

Part Context

This part belongs to Rohm's family of synchronous buck converters designed for mobile and industrial applications. It complements other models in the series offering different current ratings or input ranges. The BD46391G-TR specifically targets applications requiring moderate current delivery within a small footprint.

Replacement Considerations

Check for direct pin-compatible alternatives within the same manufacturer's portfolio that offer similar current capabilities. Verify if substitute parts support the same switching frequency options and protection features. Ensure any replacement maintains compatibility with the existing PCB layout and passive component values.