LM3671MF-1.5

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671MF-1.5/NOPB is a fixed-output synchronous step-down DC-DC converter from Texas Instruments, providing a regulated 1.5V output at up to 600mA. It operates with an input voltage range of 2.7V to 5.5V and features a typical switching frequency of 2MHz. The device integrates internal synchronous rectification for high efficiency and automatically switches between PWM and PFM modes to optimize performance under varying load conditions.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates internal synchronous rectification to maximize conversion efficiency during operation.
• Automatically transitions between Pulse Width Modulation (PWM) and Pulse Frequency Modulation (PFM) modes based on load requirements.
• Includes built-in protection mechanisms such as current overload limiting and thermal shutdown.
• Features internal soft-start functionality to limit inrush current during power-up sequences.

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage circuits from single-cell lithium-ion battery systems
• Portable electronic devices requiring efficient step-down conversion
• Embedded systems utilizing 2.7V to 5.5V input rails

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and temperature rating. Ensure compatibility with required input/output specifications before integration. Cross-reference manufacturer part numbers to avoid counterfeit components. Confirm RoHS compliance status if environmental regulations apply to the final assembly.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.5V output is required within the 2.7V to 5.5V input range. It is suitable for applications prioritizing small footprint due to the SOT-23-5 package. Consider alternative models if adjustable voltage or higher current capacity is needed beyond the 600mA limit.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM3671 family of synchronous buck converters designed for portable electronics. It shares core architecture with other variants in the series, differing primarily in fixed output voltage settings and packaging options. The family is optimized for single-cell battery applications requiring high efficiency and minimal external component count.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671MF-1.5/NOPB serves as the lead-free version of LM3671MF-1.5. Verify pinout compatibility when substituting with non-NOPB variants. Check datasheet revisions for any changes in electrical characteristics or recommended operating conditions.