LM2678T-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678T-5.0/NOPB is a SIMPLE SWITCHER power regulator from Texas Instruments, configured as a fixed-output buck converter. It delivers a stable 5 V output with a maximum current capacity of 5 A. The device operates within an input voltage range of 8 V to 40 V and utilizes a 260 kHz switching frequency. Designed for through-hole installation, it features a TO-220-7 package. The component supports a junction temperature range from -40 °C to +125 °C and includes integrated shutdown functionality.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic switch eliminates the need for external power transistors
• Fixed internal feedback network ensures precise output voltage regulation
• Built-in thermal shutdown protects against excessive heat conditions
• Current limit circuitry safeguards the device during overload events

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Distributed power architectures requiring step-down conversion
• Battery-powered equipment utilizing high-efficiency DC-DC stages
• Industrial control modules operating within wide input ranges

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix NOPB confirms lead-free and RoHS compliance status. Ensure the TO-220-7 through-hole package matches your PCB footprint requirements. Confirm the fixed 5.0 V output variant aligns with system voltage needs rather than adjustable or other fixed options. Check datasheet revisions for any pinout or electrical specification updates prior to final design approval.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part when a robust 5 A buck converter is required for through-hole assembly. The fixed 5 V output simplifies design by removing external resistor networks. Consider the 260 kHz frequency for balancing component size and efficiency. Evaluate thermal management needs given the 5 A capability in a TO-220 package. Verify input voltage stability within the 8 V to 40 V window for optimal performance.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2678 family of SIMPLE SWITCHER regulators, which are known for high efficiency and ease of use. The 'T' designation indicates the TO-220-7 through-hole package, while '5.0' specifies the fixed 5 V output. The 'NOPB' suffix denotes a non-pb (lead-free) and RoHS-compliant version manufactured by Texas Instruments.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2678T-5.0 without NOPB suffix for identical function but potential packaging differences. LM2678SX-5.0/NOPB for surface-mount TO-263 alternative. LM2678SD-5.0/NOPB for VSON-14 surface-mount option.