LM2678SD-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678SD-12 is a step-down switching regulator from Texas Instruments, operating at a fixed 52 kHz frequency. It integrates a 3A power switch and supports input voltages up to 40V. The device delivers a regulated 12V output with typical efficiency exceeding 70%. It features internal frequency compensation for stability and includes thermal shutdown protection. The SD package provides a compact solution for DC-DC conversion applications requiring high current capability.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 3A power switch for high-current step-down conversion
• Includes internal frequency compensation to minimize external component count
• Provides thermal shutdown protection for enhanced reliability

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in distributed power systems
• Battery-powered equipment requiring efficient voltage stepping
• General-purpose DC-DC converter designs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'SD' confirms the SOIC-8 package variant. Confirm the '-12' suffix indicates the fixed 12V output version. Check manufacturer documentation for exact thermal resistance values and recommended operating ambient temperature ranges before finalizing procurement specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12V output is required from an input voltage range up to 40V. Ensure the load current does not exceed the 3A integrated switch limit. Consider the 52 kHz switching frequency for inductor size trade-offs. Verify that the application environment stays within the specified junction temperature limits to maintain performance.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2678 family of simple switcher regulators. It offers a cost-effective alternative to linear regulators for higher voltage differences. The family includes adjustable and fixed voltage variants. The SD package allows for surface-mount assembly, facilitating automated manufacturing processes in consumer and industrial electronics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for direct pin-compatible alternatives such as the LM2678SX series if different packaging is needed. Verify that substitute parts maintain the same 3A current rating and 40V maximum input voltage. Ensure replacement components support the same 52 kHz switching frequency to avoid redesigning passive components.