LM2678S-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678S-12 is a SIMPLE SWITCHER power regulator from Texas Instruments, configured as a fixed-output buck converter. It delivers a stable 12 V output with a maximum current capacity of 5 A. The device operates within an input voltage range of 8 V to 40 V and utilizes a 260 kHz switching frequency. Packaged in the TO-263 (D2PAK) surface-mount format, it supports junction temperatures up to +125 °C and functions reliably down to -40 °C. This component integrates internal compensation and a frequency-compensated error amplifier to ensure stability without external feedback network adjustments.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-current switch rated for 5 A continuous load
• Fixed 12 V output eliminates external resistor divider requirements
• Internal frequency compensation simplifies design and reduces component count
• Built-in thermal shutdown protects against overheating conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Input stage conversion for industrial control modules
• Power supply conditioning for communication equipment
• Battery-powered device voltage step-down applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix designation on the datasheet to confirm package type and temperature grade. Ensure the ordering part number matches the required output voltage configuration. Cross-reference the manufacturer's latest discontinuance notifications to confirm active production status before finalizing procurement plans.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this model when a fixed 12 V rail is required at currents up to 5 A. The TO-263 package offers superior thermal dissipation compared to smaller footprints. Consider the 260 kHz frequency for balancing efficiency and passive component size. Verify that the input voltage source remains within the 8 V to 40 V operational window.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2678 family of SIMPLE SWITCHER regulators. The 'S' suffix indicates the TO-263 surface-mount package variant. The '-12' suffix specifies the fixed 12 V output version, distinguishing it from adjustable or other fixed voltage variants within the same series.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2678SX-12/NOPB: Verified equivalent offering identical electrical specifications and pinout compatibility.