LM2678S-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678S-ADJ/NOPB is a SIMPLE SWITCHER step-down voltage regulator from Texas Instruments, housed in a TO-263-7 surface-mount package. It operates with an input voltage range of 8 V to 40 V and provides an adjustable output voltage between 1.2 V and 37 V. The device supports up to 5 A output current with a fixed switching frequency of 260 kHz. Quiescent current is specified at 4.2 mA. It functions within a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-efficiency buck converter topology utilizing low on-resistance DMOS power switches
• Built-in thermal shutdown protection to safeguard against overheating conditions
• Adjustable output voltage capability via external feedback resistor network
• Fixed internal switching frequency simplifies external component selection

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Efficient DC-DC conversion in industrial control equipment
• Power supply stages for communication infrastructure
• Battery-powered devices requiring stable regulated voltage rails

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including the NOPB suffix to ensure compliance with RoHS standards and absence of lead content. Confirm the specific package variant matches the required PCB footprint. Cross-reference the manufacturer datasheet revision date to ensure alignment with current design specifications and electrical characteristics.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing circuits requiring high efficiency and robust thermal performance in a surface-mount format. Ensure the input voltage remains within the 8 V to 40 V limit. Verify that the load current does not exceed the 5 A rating. Consider the 260 kHz switching frequency for inductor and capacitor sizing requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2678 series of SIMPLE SWITCHER regulators, designed for high-current step-down applications. It shares architectural similarities with other members like the LM2677 and LM2679 but is distinguished by its specific input voltage window and integrated power switch capabilities. The series emphasizes ease of design implementation through minimal external component counts.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.