BD46425G-TR

Overview

The BD46425G-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, supporting battery-powered applications. It features a fixed switching frequency of 1.2MHz, allowing for the use of small external inductors and capacitors. The output voltage is adjustable via an external resistor divider, providing flexibility for various load requirements.

Feature Summary

• Integrated synchronous rectification with internal high-side and low-side N-channel MOSFETs for improved power efficiency.
• Fixed 1.2MHz switching frequency enables the use of compact passive components while minimizing output ripple.
• Adjustable output voltage capability through an external feedback resistor network.
• Built-in protection mechanisms including overcurrent protection and thermal shutdown to ensure reliable operation under fault conditions.

Applications

• Portable electronic devices requiring efficient power management from single-cell lithium-ion batteries
• Smartphones and tablets needing stable voltage regulation for logic circuits
• Wireless communication modules operating within low voltage ranges

Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging when ordering. Confirm the exact output voltage setting matches your design requirements using the external resistor divider. Ensure compatibility with the required input voltage range of 2.7V to 5.5V. Check for any regional compliance certifications if applicable to your market. Always refer to the latest datasheet for pin configuration and thermal recommendations.

Selection Notes

Select this component when a compact solution with high efficiency is needed for low-voltage inputs. It is suitable for applications where space constraints limit the size of external inductors. Consider the 1.2MHz frequency for balancing efficiency and component size. Evaluate the thermal performance based on the expected load current and ambient temperature conditions.

Part Context

This part belongs to Rohm's family of synchronous buck converters designed for portable electronics. It complements other models in the series that may offer different current ratings or input voltage ranges. The BD46425G-TR is optimized for applications requiring a balance between size, efficiency, and cost-effectiveness in consumer electronics.

Replacement Considerations

Check for direct replacements within Rohm's portfolio such as the BD4642x series variants. Verify pin-to-pin compatibility if substituting with parts from other manufacturers. Ensure the replacement supports the same input voltage range and switching frequency to maintain circuit stability.