LM2673T-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2673T-ADJ/NOPB is a SIMPLE SWITCHER step-down voltage regulator from Texas Instruments, housed in a TO-220-7 through-hole package. It operates with an input voltage range of 8V to 40V and delivers up to 3A output current. The device features an adjustable output voltage between 1.2V and 37V, set by external resistors. It integrates a fixed 260kHz switching frequency, internal soft-start, and adjustable current limit. Operating junction temperature ranges from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-current power switch capable of delivering 3A load current
• Fixed 260kHz switching frequency enables the use of small passive components
• Internal thermal shutdown and adjustable current limit protect against overload conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for industrial equipment
• Distributed power supply architectures
• Battery-powered systems requiring efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix NOPB indicates lead-free/RoHS compliance. Confirm the TO-220-7 package variant matches the required through-hole mounting style. Ensure the ADJ designation aligns with the need for programmable output voltage rather than a fixed value.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust 3A buck converter is needed with through-hole assembly. The 260kHz frequency balances efficiency and component size. Verify that the 40V maximum input voltage suits the source supply. Consider thermal management requirements due to the linear-like dropout characteristics inherent to non-synchronous designs.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2673 family of SIMPLE SWITCHER regulators. It serves as a high-current alternative to lower-power variants like the LM2596. The TO-220-7 package provides superior heat dissipation compared to surface-mount options within the same series, supporting reliable operation in demanding thermal environments.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2673T-5.0/NOPB offers a fixed 5V output instead of adjustable. LM2673S-ADJ/NOPB provides the same electrical performance but in a TO-263 surface-mount package. LM22673T-ADJ/NOPB is a qualified automotive-grade version with similar specifications.