LM2679T-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2679T-3.3/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 output voltage of 3.3 V 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 TO-220-7 through-hole package, supporting operation from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated power switch capable of driving high-current loads up to 5 A
• Fixed internal feedback network for simplified design
• Adjustable current limit protection for overload safeguarding

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for industrial equipment
• Power supplies for embedded systems
• Distribution power distribution networks

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number suffix, specifically /NOPB, to ensure lead-free compliance and specific packaging configuration. Confirm the TO-220-7 through-hole package requirement matches your PCB assembly capabilities. Cross-reference the manufacturer datasheet revision to ensure compatibility with your thermal management design constraints.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output is required with high current capability. The through-hole package facilitates easier prototyping and heat dissipation compared to surface-mount variants. Ensure the input voltage remains within the 8 V to 40 V range to maintain stable regulation and protect internal circuitry from overvoltage conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2679 series of SIMPLE SWITCHER regulators, designed for efficient DC/DC conversion. It shares architectural similarities with other members like the LM2678 and LM2677 but offers higher current handling. The series is known for reducing external component count while maintaining high efficiency in step-down applications.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2679T-3.3/NOPB serves as a direct replacement for older National Semiconductor versions. Verify pinout compatibility with legacy designs. Consider thermal performance differences if substituting with surface-mount equivalents like the LM2679SDX-3.3.