LMQ644A2QRXARQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMQ644A2QRXARQ1 is a 36V synchronous buck DC/DC converter designed for high-current single or dual outputs. It features an interleaved, stackable current-mode control architecture supporting up to six phases for currents up to 36A. The device offers a minimum high-side switch on-time of 50ns, enabling large step-down ratios from 12V, 24V, or automotive inputs to low-voltage rails. This specific variant provides dual adjustable outputs with maximum currents of 6A and 6A.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Interleaved, stackable current-mode control architecture for fast transient response and precise current sharing
• Optimized for power density and low electromagnetic interference (EMI)
• Supports direct conversion from standard automotive input voltages to low-voltage rails

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive electronic control units requiring high-current dual rails
• Infotainment systems demanding low EMI and high power density
• ADAS sensor processing units needing stable low-voltage power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including suffixes such as 'Q1' for automotive qualification and 'RXAR' for package type against official Texas Instruments documentation. Ensure the specific output current configuration matches the required system design, as the LMQ644xx-Q1 family includes variants with different current ratings per channel. Confirm RoHS compliance status through the manufacturer's datasheet.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing systems requiring dual independent outputs with high total current capacity in an automotive environment. The 50ns minimum on-time is critical for applications stepping down from higher bus voltages like 24V or 48V. Consider the stackable architecture if higher total currents exceeding 12A are needed by connecting multiple devices.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LMQ644xx-Q1 family of automotive-grade synchronous buck converters. The family is characterized by its ability to handle high currents through phase stacking and its optimization for compact board space. The 'A2' designation typically indicates the specific current rating configuration within the series.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes within the same family include other LMQ644xx-Q1 variants with different current ratings, such as LMQ644A1 or LMQ644B series parts, provided the electrical requirements align. Verify pin compatibility and thermal performance before substitution.