LM2674M-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2674M-3.3 is a fixed-output step-down switching regulator IC manufactured by UMW, belonging to the SIMPLE SWITCHER family. It provides a fixed 3.3V output with a maximum load current of 500mA. The device operates from an input voltage range of 7V to 40V and features a fixed switching frequency of 260kHz. Housed in an 8-SOIC surface-mount package, it supports junction temperatures from -40°C to 125°C. This non-synchronous buck converter is designed for high-efficiency DC-DC conversion in compact applications.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic power switch eliminates external component count
• Fixed internal switching frequency reduces external filter requirements
• Thermal shutdown protection ensures reliability under overload conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient voltage stepping
• General-purpose 5V or 12V bus distribution networks

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer marking on the component body to confirm UMW origin, as this part number is widely replicated across multiple foundries. Ensure the suffix matches the specific output voltage variant required for your circuit design. Cross-reference the datasheet revision date to confirm pinout compatibility with existing layouts. Check RoHS compliance status if environmental regulations apply to your final assembly process.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required from higher input rails up to 40V. The 500mA current limit suits low-power digital logic loads. Consider the 8-SOIC package constraints for thermal dissipation at full load. Verify that the 260kHz switching frequency aligns with electromagnetic interference constraints in the target application environment.

Voltage Regulators - DC DC Switching Regulators Part Context

This device is part of the LM2674 series of SIMPLE SWITCHER power converters. The series includes variants with different fixed output voltages and adjustable versions. The 'M' suffix typically denotes the SOIC package option, distinguishing it from through-hole DIP packages found in other series members like the LM2674N.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

• LM2674M-3.3/NOPB (Texas Instruments)
• LM2674M-3.3X (National Semiconductor)

Voltage Regulators - DC DC Switching Regulators FAQ

Is the LM2674M-3.3 a synchronous rectifier?

No, the LM2674M-3.3 is a non-synchronous buck converter that uses an internal P-channel MOSFET switch.

What is the maximum input voltage for this regulator?

The maximum recommended input voltage is 40V.