Introduction
Power MOSFETs serve as critical switches managing energy flow in modern electronics. For years, international brands like ROHM have led the market with established products such as the RAQ045P01TCR. However, global supply chain uncertainties and the push for technological self-reliance have made finding reliable, high-performance domestic alternatives a strategic imperative. Represented by VBsemi's VB2355, domestic components are now achieving direct对标and even exceeding international benchmarks.
Part 1: Analysis of the Classic Component
ROHM's RAQ045P01TCR is a P-channel MOSFET with a drain-source voltage of 12V and a continuous drain current of 4.5A. It features a low on-resistance of 30mΩ at 4.5V and 4.5A, making it suitable for low-voltage, medium-current applications like power management, load switching, and portable devices. Its compact design and efficiency have made it a common choice in various consumer and industrial designs.
Part 2: Performance Surpassing by the Domestic Challenger
VBsemi's VB2355 directly对标s the RAQ045P01TCR and demonstrates enhancements in key parameters:
Higher Voltage and Current Handling: Drain-source voltage reaches -30V (absolute value 30V, higher than 12V), and continuous drain current is -5.6A (absolute value 5.6A, an increase of 1.1A), providing greater design margin and power capability.
Optimized Conduction Performance: With an on-resistance of 46mΩ at 10V, it maintains low conduction losses, supported by a trench technology process for improved efficiency.
Full Compatibility: Utilizes a pin-compatible SOT23-3 package, enabling seamless replacement without PCB modifications.
The device leverages advanced trench technology, ensuring stable and reliable operation in diverse conditions.
Part 3: Core Value Beyond Specifications
Choosing a domestic alternative like VB2355 offers deeper advantages:
Ensuring Supply Chain Security: Reduces reliance on single-source international suppliers, enhancing supply stability and production continuity.
Optimizing Overall Cost: Typically provides better cost-effectiveness with comparable or superior performance, potentially simplifying peripheral designs.
Accessing Rapid Local Support: Domestic suppliers offer agile technical support and tailored solutions for specific application needs.
Boosting the Industrial Ecosystem: Each successful adoption strengthens the domestic semiconductor industry, fostering innovation and a virtuous development cycle.
Part 4: A Robust Path for Substitution Implementation
For a smooth transition, follow these steps:
Detailed Specification Comparison: Carefully compare all electrical parameters and characteristic curves.
Rigorous Laboratory Testing: Perform static and dynamic tests, temperature rise/efficiency evaluations, and reliability stress assessments.
Small-Batch Pilot Verification: Test the component in real-world products and environments, monitoring long-term performance.
Develop a Switchover and Backup Plan: Gradually implement the substitution after verification, while keeping the original design as a short-term backup.
Conclusion: Moving from "Usable" to "Excellent"
The shift from RAQ045P01TCR to VB2355 illustrates that domestic power semiconductors now compete with and surpass international classics in key aspects. Adopting such high-performance domestic components is not only a practical response to supply chain challenges but also a strategic step toward building an autonomous, resilient, and innovative industrial ecosystem for the future. Now is the time to actively evaluate and integrate quality domestic solutions.