LM2679T-12/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2679T-12/NOPB is a SIMPLE SWITCHER® step-down voltage regulator from Texas Instruments, housed in a TO-220-7 through-hole package. 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 integrates a 0.5 A internal switch and features a switching frequency of 260 kHz. Quiescent current is 4.2 mA, and it supports operation between -40°C and +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-current 0.5 A internal power switch for efficient buck conversion
• Includes built-in thermal shutdown and current limit protection mechanisms
• Supports external synchronization via the SYNC pin
• Features adjustable soft-start capability to limit inrush current

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Distributed power architectures requiring high efficiency
• Battery-powered equipment with wide input ranges
• Industrial control systems operating in harsh environments

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix NOPB indicates lead-free and RoHS compliance per manufacturer specifications. Confirm the TO-220-7 package variant matches your PCB footprint requirements. Ensure the fixed 12 V output aligns with load demands, as alternative voltages exist within the LM2679 family. Cross-reference datasheet electrical characteristics against system constraints before finalizing procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12 V output is required from an 8–40 V source. The TO-220-7 package suits applications needing robust thermal performance without external heatsinks under moderate loads. Consider the LM2679S-ADJ/NOPB if variable output voltage is necessary. Evaluate thermal dissipation requirements based on the specific input-output differential and load current.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2679 series of SIMPLE SWITCHER regulators, designed for high-efficiency step-down applications. It shares core architecture with other variants like the LM2678T-12/NOPB but offers optimized performance characteristics. The series is widely used in industrial and commercial electronics where reliable voltage regulation and thermal stability are critical.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2678T-12/NOPB serves as a direct functional substitute with identical pinout and fixed 12 V output. Verify thermal performance differences between the LM2678 and LM2679 series during replacement to ensure adequate heat dissipation in the existing enclosure.