LM2673T-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2673T-3.3 is a SIMPLE SWITCHER® 3A step-down voltage regulator manufactured by National Semiconductor, now part of Texas Instruments. It operates as a fixed-output buck converter providing 3.3V with a maximum output current of 3A. The device accepts an input voltage range from 8V to 40V and utilizes a 260kHz switching frequency. It features adjustable current limit protection and is housed in a 14-VSON (6x5mm) package with an exposed pad for thermal dissipation. The operational junction temperature range spans from -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated 3A step-down switching regulator topology
• Fixed 3.3V output configuration
• Adjustable current limit protection mechanism
• High efficiency operation at 260kHz switching frequency

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Power supply stages for microprocessors and FPGAs
• Battery-powered equipment requiring efficient voltage conversion
• Industrial control system power distribution

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer status carefully, as National Semiconductor was acquired by Texas Instruments. Confirm that the specific suffix 'T' denotes tape-and-reel packaging if required for automated assembly processes. Check for RoHS compliance status, as older production runs may not meet current environmental standards. Ensure the 14-VSON package availability matches your PCB footprint requirements before finalizing procurement decisions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required with up to 3A load capability. It is suitable for designs needing a wide input voltage range up to 40V. Consider the 14-VSON package size for space-constrained applications. Verify that the 260kHz frequency aligns with your electromagnetic interference constraints and inductor selection criteria compared to other SIMPLE SWITCHER family members.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the SIMPLE SWITCHER® family of integrated power modules designed for simplified DC-DC conversion. The LM2673 series includes various output voltage options and current ratings. The 'T' suffix typically indicates reel packaging for surface-mount technology assembly lines. This specific model provides a regulated 3.3V output derived from higher input voltages within the specified operating range.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for direct pin-compatible replacements within the LM2673 series offering different fixed voltages or adjustable outputs. Consider the LM2676 series for similar performance characteristics if alternative packaging or updated manufacturing sources are preferred. Verify functional equivalence regarding current limits and thermal management requirements before substitution.