LM2673SX-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2673SX-3.3/NOPB is a Texas Instruments step-down switching regulator in an 8-pin TO-263 surface-mount package. It provides a fixed 3.3V output at up to 3A current capability. The device operates with an input voltage range of 8V to 40V and features a fixed switching frequency of 260 kHz. It includes internal current limiting and thermal shutdown for protection. The component functions within an operating temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic power switch eliminates the need for external diodes or transistors
• Fixed 260 kHz switching frequency allows for compact passive component selection
• Internal current limit and thermal shutdown provide robust circuit protection

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient voltage conversion
• General-purpose DC/DC converter stages in industrial control units

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'SX' confirms the tape-and-reel packaging format rather than tube packaging. Confirm the 'NOPB' designation indicates lead-free and RoHS compliance status as per the manufacturer's latest documentation. Ensure the TO-263 footprint matches your PCB design requirements before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part when a fixed 3.3V output is required from an 8V to 40V input source. It is suitable for applications needing up to 3A continuous load current with moderate efficiency requirements. Consider alternative models if adjustable output voltage or significantly higher switching frequencies are necessary for specific noise constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2673 SIMPLE SWITCHER family, designed for high-efficiency buck conversion. It integrates the controller and power switch into a single IC, simplifying design compared to discrete solutions. The series is known for reducing external component count while maintaining reliable performance in various power management scenarios.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2673SX-ADJ/NOPB offers adjustable output voltage instead of fixed 3.3V. LM2673T-5.0/NOPB provides a different fixed output voltage in through-hole packaging. Verify pin compatibility and thermal characteristics when substituting with other members of the LM2673 series.