LM2678T-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678T-3.3/NOPB is a SIMPLE SWITCHER high-efficiency step-down DC/DC switching regulator manufactured by Texas Instruments. It provides a fixed 3.3V output with a maximum load current of 5A. The device operates within an input voltage range of 8V to 40V and features a switching frequency of 260kHz. Designed for through-hole mounting, it utilizes a TO-220-7 package. The integrated circuit includes all active functions required for buck converter topologies, ensuring excellent line and load regulation characteristics.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates low on-resistance DMOS power switch to achieve high efficiency exceeding 90%.
• Includes internal compensation network to minimize external component count.
• Features thermal shutdown protection to safeguard against overheating conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in distributed power architectures
• Pre-regulator stages for downstream linear regulators
• Efficient battery-powered systems requiring step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including suffixes such as NOPB to ensure compliance with RoHS standards and lead-free specifications. Confirm that the TO-220-7 through-hole package aligns with the target PCB footprint and assembly requirements before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output at up to 5A is required from an 8V to 40V input source. Consider the TO-220-7 package for applications prioritizing thermal dissipation via through-hole mounting over surface-mount density constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2678 series of SIMPLE SWITCHER regulators, which also includes adjustable versions and other fixed voltage outputs like 5V and 12V. The series is characterized by its monolithic integration of control logic and power switches, offering a compact solution for standard buck converter designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Compatible substitutes include LM2678T-ADJ/NOPB for adjustable output needs or LM2678S-3.3/NOPB for surface-mount TO-263 applications. Ensure pinout compatibility and thermal performance match the original design intent when evaluating alternatives.