LM2679SD-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM2679SD-5.0 is a discontinued SIMPLE SWITCHER® step-down voltage regulator from Texas Instruments. It operates with an input voltage range of 8 V to 40 V and provides a fixed 5 V output at up to 5 A load current. The device utilizes a buck topology with a switching frequency of 260 kHz. It is housed in a 14-VSON (5x6 mm) surface-mount package. The component supports operation within a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-current power switch capable of driving loads up to 5 A
• Fixed internal feedback network for simplified design without external resistors
• Built-in adjustable current limit protection for overload safeguarding

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Power supply stages for industrial control equipment
• Voltage conversion for battery-powered portable devices

Voltage Regulators - DC DC Switching Regulators Procurement Notes

This specific part number is officially marked as obsolete and no longer manufactured by Texas Instruments. Procurement must focus on identifying verified direct replacements or alternative packages within the same family that maintain functional compatibility. Verify RoHS compliance status, as original versions may differ from modern equivalents. Confirm package dimensions match existing PCB footprints before integration.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Designers requiring this functionality should evaluate current production alternatives such as the LM2679SD-5.0/NOPB or newer generations like the LM5163 series. Consider whether the legacy 260 kHz frequency meets EMI requirements or if higher-frequency options are preferable. Ensure thermal management strategies align with the 5 A continuous current capability and the specific thermal resistance of the chosen replacement package.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2679 series belongs to Texas Instruments' SIMPLE SWITCHER product line, designed to simplify DC/DC converter design through integrated power switches and minimal external component counts. This specific model represents the fixed 5 V output variant in the compact VSON package, historically used where space constraints and moderate efficiency were primary design drivers.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct equivalent: LM2679SD-5.0/NOPB. Verify pinout compatibility and thermal performance when substituting.