LM5123QRGRTQ1

DC DC Switching Controllers Overview

The LM5123QRGRTQ1 is a wide input range, synchronous buck controller designed for automotive applications. It operates from an input voltage range of 4.5 V to 60 V. The device integrates high-side and low-side drivers capable of sourcing and sinking peak currents of 2 A and 3 A, respectively. It supports switching frequencies up to 2 MHz with external synchronization capability. Key protection features include cycle-by-cycle current limiting, overvoltage protection, undervoltage lockout, and thermal shutdown. The component is qualified to AEC-Q100 Grade 1 standards and operates within a junction temperature range of -40 °C to +150 °C.

DC DC Switching Controllers Feature Summary

• Integrated high-side and low-side gate drivers with optimized drive strength for efficient power conversion
• Wide input voltage range supporting direct connection to battery systems and transient load conditions
• Comprehensive protection mechanisms including cycle-by-cycle current limit, overvoltage, and thermal shutdown

DC DC Switching Controllers Applications

• Automotive infotainment systems
• Digital chassis control modules
• Body control modules requiring isolated or non-isolated DC-DC conversion

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'RGRT' corresponds to the correct tape and reel packaging configuration required for automated assembly processes. Confirm that the Q1 designation aligns with the intended automotive qualification requirements for your specific application environment. Ensure compatibility with your manufacturing facility's reflow soldering profiles for QFN packages.

DC DC Switching Controllers Selection Notes

Select this controller when a wide input voltage range exceeding standard 48 V limits is required in an automotive context. Consider the integrated driver capabilities if external MOSFETs are preferred for cost or thermal management reasons. Evaluate the 2 MHz maximum switching frequency against electromagnetic interference constraints and passive component size requirements for the target design.

DC DC Switching Controllers Part Context

This component belongs to Texas Instruments' LM512x family of synchronous buck controllers. The LM5123 variant specifically offers higher drive current capabilities compared to lower-current counterparts in the series. The QR prefix indicates automotive grade qualification, while the RGRT suffix defines the physical package type and shipping configuration.

DC DC Switching Controllers Replacement Considerations

Direct replacements within the same family include the LM5123QDRVRQ1 for different packaging options. Cross-family alternatives may require evaluation of pin compatibility and driver strength differences. Verify that any substitute maintains the required AEC-Q100 qualification level for automotive deployment.