LM644A2QVBGRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LM644A2QVBGRQ1 is an automotive-grade, dual-output synchronous step-down converter designed for high-current applications. It features a 36V input voltage range and delivers up to 12A total output current across two channels. The device utilizes an interleaved, stackable current-mode control architecture to ensure fast transient response and precise load sharing. Key electrical parameters include a maximum input voltage of 36V, fixed or adjustable output voltages (defaulting to 3.3V or 5V), and a switching frequency of 2.1MHz. It operates within a temperature range of -40°C to 150°C and is housed in a WQFN-FCRLF package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Dual-output synchronous buck topology with interleaved operation for enhanced thermal performance and ripple cancellation
• Automotive qualification compliant with AEC-Q100 standards for reliability in harsh environments
• Integrated power MOSFETs with peak current mode control for efficient regulation under varying load conditions
• Advanced protection mechanisms including overcurrent protection with hiccup mode and thermal shutdown

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems and dashboard displays
• Advanced Driver Assistance Systems (ADAS) power distribution
• Body electronics and central gateway modules
• High-current USB charging hubs in vehicle interiors

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number includes the 'Q1' suffix to confirm automotive grade qualification. Ensure the 'VBG' package variant matches your PCB footprint requirements. Cross-reference the specific tape and reel quantity against your production needs. Confirm RoHS compliance status through official manufacturer documentation prior to integration into safety-critical designs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when dual isolated or non-isolated outputs are required from a single 36V rail. The interleaved architecture reduces input and output capacitance requirements compared to single-phase solutions. Consider the 2.1MHz switching frequency for smaller passive components while balancing efficiency. Evaluate the thermal dissipation capabilities of the exposed pad package against your system's ambient temperature constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LMQ644A2-Q1 family of high-efficiency DC/DC converters. It complements Texas Instruments' portfolio of automotive power management solutions by providing a compact, high-density option for multi-rail architectures. The family supports scalable designs through clock synchronization and stacking capabilities for higher current demands.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-to-pin replacements within the same automotive series should be verified via official substitution guides. Single-output variants may require circuit redesign due to different control loop characteristics. Always validate thermal performance and electromagnetic interference profiles when transitioning between similar package types.