LM2679S-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2679S-12/NOPB is a SIMPLE SWITCHER® 5A 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 5 A. The device utilizes a buck topology with a switching frequency of 260 kHz. It features adjustable current limit, shutdown capability, and operates within a temperature range of -40°C to +125°C. The component is housed in a TO-263-7 (D2PAK) surface-mount package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-current switch capable of driving 5 A loads
• Adjustable current limit protection for load safeguarding
• Fixed 12 V output configuration for simplified design
• Shutdown pin functionality for power management

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Input voltage step-down from 24 V or 48 V buses
• Battery-powered equipment requiring efficient voltage conversion
• Industrial control system power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including suffixes such as /NOPB for lead-free compliance and specific packaging options. Confirm the manufacturer source is Texas Instruments or authorized distributors to ensure authenticity. Check datasheet revisions for any updates to electrical characteristics or recommended operating conditions prior to final procurement decisions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12 V output is required from an 8 V to 40 V input source. It is suitable for designs needing 5 A continuous current with minimal external components. Consider the TO-263-7 package for thermal performance and board space constraints. Ensure the application does not require adjustable output voltages, in which case the ADJ variant should be chosen instead.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2679 series belongs to Texas Instruments' SIMPLE SWITCHER family of monolithic DC/DC converters. These regulators integrate the controller, driver, and power switch into a single IC. The LM2679S-12 is a specific fixed-voltage variant within this lineup, designed to replace linear regulators in applications where efficiency and thermal dissipation are critical concerns.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2679S-12/NOPB serves as a direct replacement for older National Semiconductor LM2679S-12 parts. For upgraded features such as soft-start, consider the LM22679 series. Verify pin compatibility and thermal requirements when substituting with other 5 A buck regulators.