LM2678SD-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678SD-3.3/NOPB is a SIMPLE SWITCHER high-efficiency step-down DC/DC switching regulator manufactured by Texas Instruments. It operates with an input voltage range of 8 V to 40 V and provides a fixed output voltage of 3.3 V at up to 5 A load current. The device utilizes a buck topology with a typical switching frequency of 260 kHz. It is housed in a 14-pin VSON package, supports surface-mount installation, and functions within a temperature range of -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a low on-resistance DMOS power switch for high efficiency exceeding 90%.
• Includes internal compensation to minimize external component count.
• Features thermal shutdown and current limit protection for robust operation.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient step-down conversion
• Industrial control system power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number includes the suffix /NOPB to confirm lead-free and RoHS compliance status as specified by Texas Instruments. Confirm the specific package variant (VSON-14) matches your PCB footprint requirements. Ensure the fixed 3.3 V output aligns with your design needs, as other voltage options exist within the LM2678 series.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output is required from an 8 V to 40 V input source. It is suitable for designs needing up to 5 A continuous current with minimal external components due to internal compensation. Consider the VSON-14 package size constraints and thermal dissipation capabilities for your specific application layout.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2678 family of SIMPLE SWITCHER regulators, which are monolithic integrated circuits designed for high-efficiency step-down applications. The family offers various fixed output voltages and adjustable versions across different packages, including TO-220, TO-263, and VSON, catering to diverse power and space requirements.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-to-pin replacements within the same package include LM2678SD-5.0/NOPB and LM2678SD-12/NOPB for different fixed output voltages. For adjustable output requirements, consider LM2678SD-ADJ/NOPB. Verify thermal performance and external component compatibility when substituting.