LM2679T-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2679T-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 a quiescent current of 4.2 mA. Designed for through-hole installation, it is housed in a TO-220-7 package and functions within a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-current switch capable of driving loads up to 5 A
• Adjustable current limit protection for enhanced reliability
• Fixed 12 V output configuration for simplified design
• Shutdown pin support for power management control

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Power supplies for industrial equipment
• Distribution bus conversion in telecommunications
• Battery-powered applications requiring efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including suffixes such as /NOPB for lead-free compliance when ordering. Confirm that the TO-220-7 through-hole package matches your PCB layout requirements. Ensure the fixed 12 V output aligns with system specifications, as other variants exist for different voltages. Cross-reference datasheet revisions to confirm thermal and electrical characteristics match your design constraints.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust 5 A buck converter with through-hole mounting is required. The fixed 12 V output eliminates external resistor networks needed for adjustable versions. Consider the TO-220-7 package for superior heat dissipation compared to surface-mount options. Verify that the 8 V to 40 V input range covers your supply variations and that the 260 kHz frequency suits your filter component size constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2679 series of SIMPLE SWITCHER regulators from Texas Instruments. The series offers various output voltages and packages, including surface-mount and through-hole options. The 'T' suffix indicates the through-hole TO-220 package, while '12' specifies the fixed 12 V output. The NOPB suffix denotes non-halogenated and RoHS-compliant construction.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2679T-12/NOPB serves as a direct replacement for older National Semiconductor LM2679T-12 parts. For equivalent performance in surface-mount designs, consider the LM2679SX-12/NOPB variant.