LM3671MFX-1.8/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671MFX-1.8/NOPB is a fixed-output synchronous buck DC-DC converter manufactured by Texas Instruments. It provides a regulated 1.8V output with a maximum load current of 600mA. The device operates from an input voltage range of 2.7V to 5.5V and utilizes a fixed switching frequency of 2MHz. It features a SOT-23-5 surface-mount package and supports an operating temperature range from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous rectification for high efficiency across the load range
• Automatically transitions between PWM and PFM modes to optimize light-load performance
• Supports shutdown mode to minimize battery drain in standby applications

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage circuits from single-cell lithium-ion batteries
• Portable consumer electronics requiring compact power solutions
• Battery-operated systems needing extended standby life

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'MFX' corresponds to the SOT-23-5 package variant required for your layout. Confirm that the fixed 1.8V output aligns with your system's voltage rail requirements, as adjustable versions exist within the same family. Ensure compatibility with the specified -40°C to +85°C industrial temperature range for your intended environment.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.8V rail is needed with up to 600mA capacity. It is suitable for designs prioritizing small footprint due to the SOT-23-5 package. Consider the 2MHz switching frequency for minimizing external passive size compared to lower-frequency alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3671 series of step-down converters designed for portable devices. It shares core architecture with other variants like the LM3671MFX-2.8/NOPB but differs in fixed output voltage. The series is characterized by its ability to drive loads efficiently while maintaining low quiescent current.

Voltage Regulators - DC DC Switching Regulators FAQ

Does the LM3671MFX-1.8/NOPB support adjustable output voltage?

No, this specific part number has a fixed internal feedback setting for 1.8V. Adjustable versions require different suffixes or pin configurations.

What is the typical quiescent current in shutdown mode?

The device draws approximately 0.01μA in shutdown mode, significantly reducing battery consumption when disabled.