LM2678S-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678S-5.0/NOPB is a SIMPLE SWITCHER high-efficiency 5A step-down voltage regulator from Texas Instruments. It operates with an input voltage range of 8V to 40V and provides a fixed 5V output. The device integrates a 1.1A/3.0A internal switch and supports switching frequencies of 260kHz or 525kHz. Key electrical parameters include a maximum output current of 5A, quiescent current of 4.2mA, and an operating temperature range of -40°C to +125°C. It utilizes pulse-width modulation control and is housed in a TO-263 (D2PAK) package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-current internal power switch to minimize external component count
• Features adjustable switching frequency for optimization of efficiency and size
• Includes thermal shutdown and current limit protection for system reliability

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient step-down conversion
• Industrial control systems operating within wide input voltage ranges

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix (e.g., NOPB) to confirm lead-free status and RoHS compliance. Ensure the package type matches the target PCB footprint, as variations exist between D2PAK and other formats. Cross-reference the exact part number against the manufacturer's latest datasheet to confirm active status and any recent design changes.

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. It is suitable for applications demanding up to 5A continuous load current. Consider the thermal performance of the TO-263 package and ensure adequate heatsinking if operating near maximum current limits.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2678 family of SIMPLE SWITCHER regulators. It shares architectural similarities with the LM2676 and LM2677 but offers higher current capability. The family is designed for straightforward implementation of buck converter topologies with minimal external passive components.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2678S-5.0/NOPB serves as a direct replacement for older National Semiconductor versions. For pin-compatible alternatives, consider the LM2678SX-5.0 series.