LM2678SX-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678SX-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 features a VSON-14 package for surface mount installation. Key electrical parameters include a maximum output current of 5A, a quiescent current of 4.2mA, and an operating temperature range from -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 levels
• Internal compensation reduces external part count and board space
• Thermal shutdown protection safeguards against overheating conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Power supply stages for industrial control equipment
• Voltage conversion for communication infrastructure modules
• Battery-powered device power management

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix NOPB indicates lead-free and RoHS compliance status as per manufacturer specifications. Confirm the SX package designation corresponds to the VSON-14 footprint required for your PCB layout. Ensure the fixed 5.0V output variant matches your system voltage requirements rather than adjustable or other fixed voltage options. Cross-reference the datasheet revision date to confirm technical accuracy 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 without requiring external pass transistors. The 260kHz frequency allows for smaller inductor and capacitor selection compared to lower frequency regulators. Consider the VSON-14 package constraints for thermal dissipation and trace routing in dense layouts.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2678 series of SIMPLE SWITCHER regulators, designed for high-efficiency DC-DC conversion. The series includes adjustable and various fixed voltage variants. The LM2678SX-5.0/NOPB specifically targets applications needing a stable 5V rail with minimal external components. It represents a mature technology platform within Texas Instruments' power management portfolio.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2678S-5.0/NOPB offers identical electrical performance in a TO-263-7 package. LM2678SD-5.0/NOPB provides the same functionality in a VSON-14 package. Verify pinout compatibility and thermal characteristics when substituting between package types.