LM2673S-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2673S-12 is a SIMPLE SWITCHER® 3-A step-down voltage regulator manufactured by Texas Instruments. It operates with an input voltage range of 8 V to 40 V and provides a fixed 12 V output at up to 3 A. The device integrates a 55-V, 3-A power switch and operates at a fixed switching frequency of 260 kHz. It utilizes current mode control for rapid transient response and includes adjustable current limiting. The component is housed in a TO-263-7 (DDPAK) surface-mount package and supports junction temperatures from -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-voltage 55-V, 3-A power switch for robust operation
• Employs current mode control architecture for fast transient response
• Includes internal adjustable current limit protection
• Features fixed 260 kHz switching frequency to minimize external component size

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Distributed power architectures requiring 12 V rails
• Battery-powered equipment input stage conversion
• General-purpose 3-A step-down power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm pinout compatibility and thermal characteristics. Ensure the ordering part number matches the required fixed output voltage variant. Cross-reference the package marking code with the manufacturer's latest datasheet to authenticate the component origin and revision level before integration into production designs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this regulator when a fixed 12 V output is required from an 8–40 V input source with up to 3 A load capacity. The fixed output version eliminates the need for external feedback resistors compared to adjustable variants. Consider the TO-263-7 package for its thermal dissipation capabilities in space-constrained applications requiring surface-mount assembly.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2673 belongs to the SIMPLE SWITCHER family of monolithic DC-DC converters. This series is designed to simplify power supply design by integrating the controller, power switch, and freewheeling diode into a single IC. The LM2673 specifically targets applications needing higher current capability than the 1-A or 2-A counterparts while maintaining a compact footprint and minimal external component count.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2673S-12/NOPB