LM22673QMRX-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM22673QMRX-5.0/NOPB is a Texas Instruments SIMPLE SWITCHER step-down voltage regulator with a fixed 5 V output and 3 A maximum current capability. It operates from an input voltage range of 4.5 V to 42 V at a switching frequency of 500 kHz. The device integrates a power MOSFET, error amplifier, oscillator, and protection circuits including adjustable soft-start and current limit. It is housed in an 8-pin SO-PowerPAD (DGS) package and qualified under AEC-Q100 standards for automotive applications.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-side N-channel power switch eliminates external component requirements.
• Built-in adjustable soft-start limits inrush current during startup.
• Constant-frequency current-mode control architecture ensures stable operation.
• Comprehensive protection features include thermal shutdown and cycle-by-cycle current limiting.

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems
• Industrial point-of-load regulation
• Embedded controller power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'QMRX' indicates the tape-and-reel packaging variant distinct from the 'QMRE' cut-tape version. Confirm that the 'NOPB' designation ensures compliance with RoHS directives and absence of lead-based materials. Ensure the ordering part number matches the required fixed 5.0 V output configuration rather than the adjustable ADJ variant.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5 V rail is required within a 4.5 V to 42 V input window. The 500 kHz switching frequency allows for smaller passive components compared to lower-frequency regulators. Verify that the SO-PowerPAD thermal performance meets the system's heat dissipation requirements without additional heatsinking.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM22673 family of SIMPLE SWITCHER regulators. It shares core topology with the LM2673 but offers improved efficiency and integrated protection. The QMRE and QMRX suffixes denote different packaging formats, while the -5.0/NOPB specifies the fixed voltage and environmental compliance.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM22673QMRE-5.0/NOPB serves as a direct functional equivalent differing only in reel versus cut-tape packaging. LM2673 variants offer similar functionality but operate at a lower 260 kHz frequency requiring larger inductors.