LM2671N-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2671N-3.3 is a fixed-output step-down switching regulator manufactured by Texas Instruments, designed for high-efficiency power conversion in industrial and automotive applications. It integrates a 0.5A internal switch and operates from an input voltage range of 4.5V to 40V. The device provides a stable 3.3V output with a maximum load current of 500mA. Key electrical specifications include a typical efficiency of 86% at nominal conditions, a fixed switching frequency of 260kHz, and a quiescent current of 2.5mA. It supports operation over an extended temperature range from -40°C to +125°C and utilizes a through-hole MDIP-8 package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 0.5A power switch for simplified external component selection
• Fixed 260kHz switching frequency enables the use of compact inductors and capacitors
• Includes thermal shutdown and current limit protection for robust operation

Voltage Regulators - DC DC Switching Regulators Applications

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

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the package type matches your design requirements, as the LM2671 series includes both surface-mount (SOIC) and through-hole (MDIP) variants. Confirm the suffix indicates lead-free composition if RoHS compliance is mandatory. Ensure the specific revision level meets your manufacturing standards. Cross-reference the datasheet for exact pinout configurations to prevent assembly errors during PCB layout and production.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a through-hole solution is preferred for prototyping or high-reliability environments. It is suitable for applications requiring moderate output currents up to 500mA without external pass transistors. Consider the 260kHz frequency for balancing component size against electromagnetic interference. Evaluate thermal performance under maximum load conditions given the package's thermal characteristics.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2671 family of simple-switcher regulators, which are known for their ease of use and minimal external component count. The family offers various fixed output voltages and adjustable versions. The 'N' suffix specifically denotes the monolithic dual-in-line package, distinguishing it from the surface-mount 'M' variant. This family targets cost-sensitive designs requiring reliable DC-DC conversion.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements include other LM2671 variants with different output voltages or packages, such as LM2671M-3.3/NOPB for surface-mount applications. For higher current requirements, consider the LM2672 or LM2673 series. Verify that substitute parts maintain compatible input voltage ranges and switching frequencies to ensure circuit stability.