LM3671MF-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671MF-3.3/NOPB is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, belonging to the LM3671 series. It operates with an input voltage range of 2.7 V to 5.5 V and provides a fixed output voltage of 3.3 V. The device supports a maximum output current of 600 mA and utilizes a buck topology. Key electrical parameters include a switching frequency of 2.6 MHz, a typical static current of 16 µA, and a shutdown current of 0.01 µA. It is housed in a SOT-23-5 package and functions within a temperature range of -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous rectification for high efficiency across load conditions
• Automatically switches between PWM and PFM modes to optimize light-load performance
• Includes internal protection mechanisms such as overcurrent limiting and thermal shutdown

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage circuits from single-cell lithium-ion batteries
• Portable electronic devices requiring compact power solutions
• Battery-operated systems prioritizing extended standby life

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free compliance and RoHS adherence. Confirm the 'MF' designation corresponds to the SOT-23-5 package variant rather than other form factors like DSBGA. Ensure the fixed 3.3V output rating matches the target circuit requirements, as adjustable variants exist within the same family.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V rail is required from a 2.7V to 5.5V source. It is suitable for designs needing 600mA peak current with minimal external components. Consider the SOT-23-5 footprint constraints and the 2.6MHz switching frequency for inductor selection. Verify thermal dissipation capabilities if operating near maximum load currents.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3671 family of step-down converters designed for portable applications. It shares core architecture with adjustable versions like the LM3671MF-ADJ/NOPB but offers a fixed output to simplify design. The device replaces older linear regulators in battery-powered systems to improve efficiency and reduce heat generation.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671MF-3.3 (Obsolete)

Voltage Regulators - DC DC Switching Regulators FAQ

Does the LM3671MF-3.3/NOPB support adjustable output voltages?

No, this specific part number provides a fixed 3.3V output. Adjustable versions are available under different suffixes, such as LM3671MF-ADJ/NOPB.

What is the maximum input voltage for this converter?

The maximum input voltage is 5.5 V, making it suitable for single-cell lithium-ion battery applications.