LM2673S-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2673S-3.3/NOPB is a Texas Instruments SIMPLE SWITCHER step-down switching regulator designed for high-efficiency power conversion. It integrates a 0.49A internal switch and supports an input voltage range of 8V to 40V, delivering a fixed 3.3V output at up to 3A. Operating with a typical switching frequency of 260kHz, the device utilizes a TO-263 (D2PAK) surface-mount package. It features thermal shutdown and current limit protection, ensuring reliable operation across an extended temperature range from -40°C to +125°C junction temperature.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a robust internal power switch rated for 3A continuous load current
• Utilizes SIMPLE SWITCHER architecture for simplified design and minimal external component count
• Includes comprehensive protection mechanisms such as thermal shutdown and cycle-by-cycle current limiting

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient voltage stepping
• Industrial control systems operating within wide input voltage ranges

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout compatibility and electrical characteristics. Ensure the ordering part number includes the correct package designation and temperature grade. Cross-reference manufacturer documentation to validate RoHS compliance status and moisture sensitivity level prior to integration into production designs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required from higher voltage rails up to 40V. The TO-263 package offers superior thermal dissipation compared to smaller footprints, making it suitable for applications where heat management is critical without additional heatsinking. Consider the 260kHz switching frequency for balancing component size and efficiency.

Voltage Regulators - DC DC Switching Regulators Part Context

Part of the LM2673 family of adjustable and fixed-output buck converters. This series is characterized by its simplicity and high efficiency, often replacing linear regulators in applications where dropout voltage and power dissipation are concerns. The 'S' suffix denotes the TO-263 surface-mount package variant.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements include LM2673S-3.3/NOPB equivalents from other manufacturers with identical pinouts and electrical specs. Verify thermal performance and switching frequency compatibility when substituting with non-TI parts.