LM3674MF-1.8/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3674MF-1.8/NOPB is a fixed-output step-down DC-DC converter manufactured by Texas Instruments. It provides a regulated 1.8 V output with a maximum load current of 600 mA. The device operates from an input voltage range of 2.7 V to 5.5 V and utilizes a typical switching frequency of 2 MHz. It is housed in a compact SOT-23-5 package and supports surface-mount installation. The operational temperature range extends from -30°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Internal synchronous rectification ensures high efficiency during PWM mode operation.
• High switching frequency allows the use of minimal external components, specifically one inductor and two ceramic capacitors.
• Shutdown mode reduces battery consumption to a typical value of 0.01 µA.

Voltage Regulators - DC DC Switching Regulators Applications

• Mobile phones
• Portable systems
• Low-voltage circuits powered by single Li-Ion cell batteries

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free compliance and RoHS status as documented in official datasheets. Confirm the 'MF' variant designation matches the required SOT-23-5 package type for your PCB layout. Ensure the fixed 1.8 V output aligns with target circuit requirements, as adjustable versions exist within the same family.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.8 V rail is required from a 2.7 V to 5.5 V source. The 600 mA current capability suits moderate load applications. Consider the 2 MHz frequency for minimizing passive component size. Verify thermal performance within the -30°C to +85°C operating range for the intended environment.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3674 series of step-down converters optimized for portable electronics. It shares core architecture with other variants offering different fixed voltages or adjustable outputs. The series is designed for single-cell lithium-ion battery applications, emphasizing efficiency and small footprint through integrated synchronous rectification.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer cross-reference tools for potential alternatives if this specific fixed-voltage variant is unavailable.