BD46412G-TR

Overview

The BD46412G-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 efficient power conversion with an input voltage range of 3.0V to 5.5V. The device supports adjustable output voltages down to 0.8V via an external resistor divider. It features a fixed switching frequency of 1.2MHz, enabling the use of small inductors and capacitors. The IC includes comprehensive protection mechanisms such as overcurrent protection, thermal shutdown, and soft-start functionality to ensure reliable operation under various load conditions.

Feature Summary

• Integrated synchronous rectification with internal high-side and low-side N-channel MOSFETs for high efficiency
• Fixed 1.2MHz switching frequency allows for compact passive component selection
• Built-in overcurrent protection and thermal shutdown for enhanced system reliability
• Adjustable output voltage capability with precise internal reference voltage

Applications

• Portable electronic devices requiring efficient power management from single-cell lithium batteries
• Embedded systems and microcontroller units needing stable low-voltage power supplies
• IoT sensors and wireless communication modules with strict power consumption constraints

Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging when ordering. Confirm the package type matches your PCB footprint requirements. Ensure compatibility with your target input voltage range and desired output current specifications before finalizing procurement. Check for RoHS compliance status if required by your manufacturing standards.

Selection Notes

Select this component when a compact solution is needed for converting 3.3V or 5V inputs to lower logic-level voltages. Consider the integrated MOSFETs for reduced board space compared to discrete solutions. Evaluate the 1.2MHz frequency against EMI requirements and inductor size constraints. Verify that the maximum load current does not exceed the device's thermal limits in your specific enclosure design.

Part Context

This part belongs to Rohm's family of synchronous buck converters designed for portable applications. It complements other models in the series offering different current ratings or input ranges. The BD464xx series is engineered for high efficiency and minimal external component count, targeting consumer electronics and industrial control systems where space and power efficiency are critical.

Replacement Considerations

Check for direct pin-compatible alternatives within the same manufacturer's portfolio that offer similar current capabilities. Verify that substitute parts maintain the same switching frequency to avoid redesigning passive components. Ensure replacement ICs support the required input voltage range and output voltage adjustability. Cross-reference protection features like thermal shutdown and overcurrent limits for functional equivalence.