LM5140QRWGTQ1

DC DC Switching Controllers Overview

The LM5140QRWGTQ1 is an automotive-grade dual synchronous buck controller from Texas Instruments, designed for high-efficiency power conversion. It features a wide input voltage range of 3.8V to 65V and supports switching frequencies of 440kHz or 2.2MHz. The device operates within a junction temperature range of -40°C to +150°C and is housed in a 40-VQFNP (6x6) package with wettable flanks. Certified under AEC-Q100 standards, it integrates current-mode control, soft-start, and clock synchronization capabilities for robust system performance.

DC DC Switching Controllers Feature Summary

• Dual-channel synchronous buck architecture supporting independent output regulation
• Wide input voltage capability accommodating diverse automotive supply rails
• High-frequency operation options enabling compact passive component selection
• Automotive qualification ensuring reliability in harsh thermal environments

DC DC Switching Controllers Applications

• Automotive infotainment and display power distribution systems
• Advanced driver assistance systems (ADAS) power management
• Vehicle gateway and central electronic control units
• High-power LED lighting drivers in automotive applications

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'TQ1' against official Texas Instruments documentation to confirm tape-and-reel packaging and moisture sensitivity level requirements. Ensure that the ordering part number matches the exact temperature grade and package variant specified in the datasheet to avoid compatibility issues with automated assembly processes.

DC DC Switching Controllers Selection Notes

Select this controller when designing multi-rail power architectures requiring synchronized switching to reduce electromagnetic interference. The wide input range suits direct battery connection scenarios, while the high-frequency option allows for smaller inductors. Consider the thermal performance of the VQFNP package and ensure adequate PCB copper area for heat dissipation during continuous operation.

DC DC Switching Controllers Part Context

This component belongs to the LM514x family of wide-input synchronous buck controllers. It shares architectural similarities with the LM5141 single-phase and LM5143 three-phase variants but distinguishes itself through its dual-output configuration. The family targets demanding automotive applications where efficiency, size, and reliability are critical constraints for power delivery networks.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.