LM2678SD-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678SD-5.0/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 5 V at up to 5 A load current. The device utilizes a buck topology with a standard switching frequency of 260 kHz. It is housed in a 14-pin VSON package and supports surface-mount installation. The component functions within a junction 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 protection to safeguard against overheating.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment power supplies
• Industrial control system voltage conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix /NOPB indicates RoHS compliance and absence of lead. Confirm the specific package variant matches design requirements, as the SD suffix denotes the VSON-14 form factor. Ensure ordering documentation references the correct fixed 5V output version distinct from adjustable or other voltage variants within the LM2678 family.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part when a fixed 5V output is required from an 8V to 40V input source. It is suitable for designs needing up to 5A continuous current in a compact footprint. Consider the 260 kHz switching frequency for inductor sizing trade-offs between size and ripple current. Verify thermal management capabilities for the VSON-14 package under maximum load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2678 series of SIMPLE SWITCHER regulators. The series includes various output voltage options and package types such as TO-220 and D2PAK. The SD variant specifically refers to the small outline VSON package, offering a reduced board area compared to through-hole alternatives while maintaining similar electrical performance characteristics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2678SD-5.0/NOPB serves as the direct RoHS-compliant replacement for the non-compliant LM2678SD-5.0. Other voltage variants like LM2678SD-3.3 or LM2678SD-12 share identical pinouts but provide different fixed outputs.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the switching frequency of the LM2678SD-5.0?

The device operates at a fixed switching frequency of 260 kHz.

Does the LM2678SD-5.0 support adjustable output voltage?

No, the LM2678SD-5.0 provides a fixed 5V output. Adjustable versions are available under different model suffixes.