LM2671M-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2671M-3.3/NOPB is a high-efficiency, monolithic switching voltage regulator manufactured by Texas Instruments. It integrates a 0.5A power switch and operates as a step-down DC-DC converter in a buck topology. The device provides a fixed 3.3V output with a maximum continuous output current of 500mA. It features an internal oscillator operating at a switching frequency of 260kHz. The component supports input voltages up to 40V and includes built-in thermal shutdown and current limiting protection. It is housed in an SOIC-8 surface-mount package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 0.5A power switch for compact design
• Fixed 3.3V output option eliminates external feedback resistors
• Includes thermal shutdown and current limit protection

Voltage Regulators - DC DC Switching Regulators Applications

• Portable battery-powered equipment
• Point-of-load regulation
• General-purpose power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix (e.g., NOPB) to confirm RoHS compliance status. Ensure the package type matches the required PCB footprint, typically SOIC-8 for this variant. Cross-reference the datasheet revision date to confirm pinout consistency and electrical characteristics against the target design specifications before finalizing procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required from higher input voltages. The integrated 0.5A switch limits suitability for loads exceeding this current threshold. Consider the 260kHz switching frequency regarding EMI constraints and passive component sizing compared to higher-frequency alternatives. Verify that the input voltage range aligns with the system's supply capabilities.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2671 series of adjustable and fixed-output switching regulators. The 'M' designation indicates the SOIC-8 package variant. The '-3.3' specifies the fixed output voltage version. The '/NOPB' suffix denotes a lead-free, halogen-free product compliant with RoHS standards, distinguishing it from older non-compliant manufacturing batches within the same functional family.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2671MX-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum input voltage for the LM2671M-3.3?

The maximum input voltage supported by the LM2671M-3.3 is 40V.

Does the LM2671M-3.3 require external feedback resistors?

No, the fixed 3.3V output version does not require external feedback resistors as the reference voltage is internally set.