LM2673SD-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2673SD-12/NOPB is a SIMPLE SWITCHER® 3A step-down voltage regulator from Texas Instruments. It provides a fixed 12V output with a maximum input voltage of 40V and minimum input of 8V. The device operates at a switching frequency of 260kHz, enabling the use of small external components. It features adjustable current limit for protection and is housed in a compact 14-VSON (5x6) package with an exposed thermal pad. The operational junction temperature range extends from -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated adjustable current limit protects against short circuits and overloads
• Fixed 260kHz switching frequency minimizes required passive component size
• Internal compensation simplifies design and reduces external component count
• Thermal shutdown and undervoltage lockout provide comprehensive circuit protection

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient voltage conversion
• Industrial control systems operating within specified voltage ranges
• Telecommunications infrastructure power distribution

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number includes the suffix /NOPB to confirm lead-free and RoHS compliance status as documented by the manufacturer. Confirm the specific output voltage variant matches the application requirement, as the LM2673 series offers multiple fixed voltage options. Ensure the package designation SD corresponds to the 14-VSON footprint required for the PCB layout. Cross-reference the datasheet revision date to ensure compatibility with current manufacturing standards.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12V output is required from an 8V to 40V input source with up to 3A load capability. The 260kHz frequency allows for smaller inductors compared to lower-frequency regulators. Consider the thermal performance of the VSON package and ensure adequate copper area on the PCB for heat dissipation. Verify that the input voltage remains above the minimum threshold during all operating conditions to maintain regulation.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2673 belongs to Texas Instruments' SIMPLE SWITCHER family of monolithic DC-DC converters. This series is designed for high-efficiency step-down applications. The LM2673SD-12 specifically denotes the 12V fixed output version in the surface-mount VSON package. It shares core architecture with other variants like the LM2673S-12 but differs in packaging and pin configuration.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitutes include LM2673SD-12/NOPB and LM2673SDX-12/NOPB. These parts share identical electrical specifications and pinouts. Verify that any alternative from other manufacturers matches the 3A current rating, 40V input limit, and 14-VSON package dimensions before integration.