LM2673T-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2673T-3.3/NOPB is a step-down switching regulator from Texas Instruments, operating at a fixed 260 kHz frequency. It delivers a regulated 3.3 V output with a maximum current capacity of 3 A. The device accepts an input voltage range from 8 V to 40 V and utilizes a buck topology. It is housed in a TO-220-7 through-hole package and supports junction temperatures between -40 °C and +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic power switch eliminates the need for external high-current components.
• Fixed internal oscillator ensures stable operation without requiring external timing adjustments.
• Built-in thermal shutdown circuitry protects the device during overload or excessive temperature conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for 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 suffix 'NOPB' confirms lead-free and RoHS compliance status. Ensure the 'T' designation matches the required TO-220-7 through-hole package variant. Cross-reference the specific manufacturer datasheet to confirm the fixed 3.3 V output version is available, as the base part number may offer adjustable options.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust 3 A buck converter is needed for through-hole designs. The fixed 3.3 V output simplifies bill of materials by removing feedback resistors. Consider the TO-220-7 package for applications where board space allows but thermal dissipation via the case is beneficial.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2673 series of simple switchers. It shares core architecture with variants like the LM2673T-ADJ/NOPB and surface-mount versions such as the LM2673SD-5.0/NOPB. The primary distinction lies in the fixed output voltage and the specific through-hole packaging format.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-compatible alternatives within the same family include the LM2673T-ADJ/NOPB for adjustable output requirements. Surface-mount equivalents like the LM2673S-ADJ/NOPB offer similar electrical performance in a different footprint.