LM3671MF-1.6/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671MF-1.6/NOPB is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, featuring a 1.6 V output and 600 mA maximum load current. It operates within a 2.7 V to 5.5 V input range using a Buck topology with a typical 2 MHz switching frequency. The device utilizes SOT-23-5 packaging and supports surface mount installation. Electrical specifications include a typical quiescent current of 16 µA in PFM mode and 0.01 µA in shutdown. Operating temperatures range from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Intelligent automatic switching between Pulse Width Modulation (PWM) low-noise mode and Pulse Frequency Modulation (PFM) low-current mode to optimize efficiency across varying load conditions.
• Internal synchronous rectification ensures high energy conversion efficiency during PWM operation while minimizing external component count.
• Integrated protection mechanisms including internal soft-start, current overload protection, and thermal shutdown to maintain system stability under fault conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage circuits from single-cell lithium-ion batteries in mobile phones
• Portable hard drives and personal digital assistants requiring compact power solutions
• MP3 players and digital cameras utilizing battery-powered architectures

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per manufacturer documentation. Confirm the 'MF' package designation corresponds to the SOT-23-5 form factor required for your PCB layout. Ensure the fixed 1.6 V output voltage aligns precisely with your target rail requirements, as adjustable variants exist within the same family.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.6 V output is required without external feedback resistors. It is suitable for designs prioritizing minimal bill of materials due to the three-component external requirement. Consider the 2 MHz frequency for smaller inductor sizes compared to lower-frequency alternatives. Verify that the 600 mA current limit meets peak load demands of the downstream circuitry.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3671 series of 2 MHz, 600 mA step-down DC-DC converters designed for portable electronics. The series offers various fixed voltage outputs and adjustable versions to support diverse low-voltage logic and memory rails. The LM3671 family is optimized for space-constrained applications requiring high efficiency and small footprint.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671MF-1.6: Non-RoHS compliant predecessor version.

Voltage Regulators - DC DC Switching Regulators FAQ

Does the LM3671MF-1.6/NOPB support adjustable output voltages?

No, the '1.6' suffix indicates a fixed 1.6 V output. Adjustable versions are available under different suffixes such as ADJ.

What is the typical static current consumption in light-load conditions?

The typical quiescent current is 16 µA when operating in the Pulse Frequency Modulation (PFM) mode.