LM2678T-12/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678T-12/NOPB is a SIMPLE SWITCHER® 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 is housed in a TO-220-7 through-hole package, supports a junction temperature range from -40 °C to +125 °C, includes shutdown functionality, and draws a typical quiescent current of 4.2 mA.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-current power switch capable of delivering up to 5 A output
• Fixed internal feedback network ensures precise 12 V regulation without external resistors
• Built-in thermal shutdown protection safeguards against overheating conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Distribution bus conversion in industrial equipment
• Power supply stages for communication infrastructure

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix NOPB confirms lead-free and RoHS compliance per manufacturer specifications. Confirm the TO-220-7 package variant matches your thermal management requirements. Ensure the fixed 12 V output aligns with your load requirements as this part lacks adjustable options.

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. The TO-220-7 package suits applications needing robust thermal dissipation via heatsinking. Consider the 260 kHz frequency for balancing component size and efficiency needs.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2678 series of SIMPLE SWITCHER regulators. It shares core architecture with other variants like LM2678S-12/NOPB but differs in package type. The series is designed for high-efficiency DC-DC conversion with minimal external components.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2678S-12/NOPB offers identical electrical performance in a surface-mount TO-263-7 package. LM2678SD-5.0/NOPB provides similar regulation in a smaller VSON-14 package.