BD46431G-TR

Overview

The BD46431G-TR is a linear voltage regulator IC manufactured by Rohm Semiconductor. It provides a fixed output voltage of 3.3V with a maximum output current of 150mA. The device operates within an input voltage range of 2.7V to 5.5V. Key electrical specifications include a typical dropout voltage of 200mV at 100mA load and a quiescent current of 45µA. It features built-in protection mechanisms such as thermal shutdown and short-circuit protection, ensuring reliable operation in portable electronic applications.

Feature Summary

• Fixed 3.3V output voltage for stable power supply
• Low dropout voltage capability for efficient battery usage
• Integrated thermal shutdown and short-circuit protection
• Compact SOT-25 package design

Applications

• Portable consumer electronics
• Battery-powered devices
• Embedded systems requiring stable 3.3V logic levels

Procurement Notes

Verify the exact suffix 'TR' indicates tape and reel packaging when ordering. Confirm the operating temperature range matches your specific application environment. Ensure compatibility with the required input voltage range of 2.7V to 5.5V. Check for any specific handling requirements due to the sensitive nature of linear regulators.

Selection Notes

Select this component when a fixed 3.3V output is required with low noise and high stability. Consider the 150mA current limit for load requirements. Evaluate the dropout voltage performance against your minimum input voltage constraints. Verify that the SOT-25 package fits your PCB layout constraints.

Part Context

This part belongs to Rohm's series of low-dropout linear regulators designed for portable applications. It offers a balance of performance and cost-effectiveness for standard voltage regulation needs. The fixed output variant simplifies design integration compared to adjustable counterparts.

Replacement Considerations

Check for direct pin-compatible alternatives from other manufacturers offering similar 3.3V output and current ratings. Verify equivalent dropout voltage and quiescent current specifications. Ensure thermal management capabilities match or exceed the original component's performance.