LM2673LD-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM2673LD-5.0 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 a stable 5V output at up to 3A load current. The device integrates a 0.49Ω internal switch and supports an input voltage range from 8V to 40V. It utilizes a 260kHz switching frequency to minimize external component size while maintaining efficient power conversion. The regulator includes adjustable current limit protection and thermal shutdown features for robust operation in demanding environments.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated 0.49 ohm internal power switch for high efficiency
• Fixed 5V output configuration with 3A continuous current capability
• Adjustable current limit protection mechanism
• Thermal shutdown protection for enhanced reliability

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for digital logic circuits
• Power supply stages for microprocessors and FPGAs
• Battery-powered systems requiring efficient step-down conversion
• Industrial control equipment power distribution

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor was acquired by Texas Instruments. Ensure the suffix matches the required package type and temperature rating. Confirm RoHS compliance status if environmental regulations apply to your assembly process. Cross-reference the specific ordering suffix with official TI documentation to ensure correct pinout and electrical characteristics.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5V output is required with up to 3A capacity. The 260kHz frequency allows for smaller inductors compared to lower-frequency regulators. Consider the 8V to 40V input range suitability for your source voltage. Evaluate thermal performance requirements given the integrated switch design and available package options for heat dissipation.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the SIMPLE SWITCHER family of synchronous and non-synchronous buck regulators. It shares architectural similarities with the LM2679 (5A) and LM1575 (1A) variants. The LD package denotes a surface-mount VSON format suitable for compact PCB layouts. It serves as a cost-effective solution for medium-power DC-DC conversion applications.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2673SD-5.0/NOPB offers identical electrical specifications in a different surface-mount package variant. LM22673TJE-5.0/NOPB provides similar functionality with improved soft-start features in a TO-263 package. Verify pin compatibility and thermal requirements when substituting with these alternatives.