LM2678S-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678S-5.0/NOPB is a high-efficiency 5A step-down voltage regulator from the SIMPLE SWITCHER family by Texas Instruments. It operates with an input voltage range of 8V to 40V and provides a fixed 5V output. The device utilizes a buck topology with a switching frequency of 260kHz. It is housed in a TO-263 (D2PAK) package, suitable for surface-mount installation. The regulator supports a maximum output current of 5A and functions within a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated power switch eliminates external component requirements for basic operation
• Fixed 5V output configuration simplifies design for standard logic supplies
• Internal frequency compensation reduces external part count
• Thermal shutdown and current limit protection enhance reliability

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Distribution bus conversion in industrial equipment
• Power supply stages for microprocessor cores
• Battery-powered devices requiring efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix NOPB indicates lead-free/RoHS compliance as per Texas Instruments specifications. Confirm the S suffix corresponds to the TO-263 package variant. Ensure the -5.0 designation matches the required fixed 5V output level. Cross-reference the manufacturer part number with official TI databases to confirm current production status and datasheet revisions before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5V output is required from an 8V to 40V input source. The 5A current capability suits moderate load applications. The TO-263 package offers better thermal performance than smaller footprints. Consider the 260kHz switching frequency for inductor size trade-offs. Verify that the fixed output voltage meets system requirements without needing adjustment resistors.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2678 series of SIMPLE SWITCHER regulators. It shares architectural similarities with the LM2676 and LM2677 but differs in current rating and package options. The LM2678S variant specifically denotes the TO-263 surface-mount package. It serves as a robust solution for medium-power DC-DC conversion tasks within the broader Texas Instruments power management portfolio.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2678S-5.0/NOPB is functionally equivalent to LM2678S-5.0. Check for updated revision letters if available. Direct pin-compatible alternatives may include LM2679S-5.0/NOPB if higher efficiency or different thermal characteristics are needed, though verification against the latest datasheets is mandatory.