LM2678T-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678T-ADJ/NOPB is a SIMPLE SWITCHER step-down DC/DC switching regulator from Texas Instruments. It operates with an input voltage range of 8V to 40V and provides an adjustable output voltage between 1.21V and 37V. The device supports a maximum output current of 5A through a single positive output channel. It utilizes a buck topology with a fixed switching frequency of 260kHz and lacks synchronous rectification. The component is housed in a TO-220-7 form-leaded package designed for through-hole mounting, ensuring reliable operation across a junction temperature range of -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-current power switch capable of delivering up to 5A output
• Fixed 260kHz switching frequency enables the use of compact passive components
• Built-in thermal shutdown protection safeguards against overheating conditions
• Adjustable output voltage allows flexible design configurations within specified limits

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for digital signal processors
• Power supply stages for embedded controller systems
• Voltage conversion for industrial instrumentation modules

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the ordering suffix NOPB confirms compliance with RoHS3 standards and absence of antimony oxide. Confirm the specific package variant matches the required TO-220-7 form-leaded configuration for through-hole assembly processes. Ensure the adjustable output designation aligns with external resistor network requirements for target voltage setting.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust through-hole solution is required for high-current buck applications. The non-synchronous design offers simplicity but may impact efficiency compared to synchronous alternatives. Consider the thermal performance of the TO-220 package for heat dissipation needs. Verify that the 8V minimum input voltage suits the system's lowest operating condition.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2678 series of SIMPLE SWITCHER regulators, which are known for their ease of use and high efficiency. The series includes various output voltage options and package types, such as surface-mount variants like the LM2678S and LM2678SX. The LM2678T specifically denotes the through-hole TO-220 package version, providing mechanical stability and thermal advantages for higher power densities.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2678T-ADJ/NOPB is functionally equivalent to LM2678T-ADJ. For surface-mount replacements, consider LM2678SX-ADJ/NOPB or LM2678SD-ADJ/NOPB, noting the package change from TO-220 to TO-263 or VSON.