LM3671MF-1.8

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671MF-1.8/NOPB is a synchronous step-down DC-DC converter manufactured by Texas Instruments, designed for portable applications. It operates within an input voltage range of 2.7 V to 5.5 V and provides a fixed output voltage of 1.8 V with a maximum load current of 600 mA. The device features a typical switching frequency of 2 MHz and utilizes SOT-23-5 surface-mount packaging. It supports an operating temperature range from -40 °C to +85 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Intelligent automatic switching between PWM low-noise mode and PFM low-current mode to optimize system control and efficiency across varying load conditions.
• Internal synchronous rectification ensures high energy conversion efficiency during PWM operation while minimizing external component requirements.
• Integrated protection mechanisms include internal soft-start functionality, current overload protection, and thermal shutdown to safeguard circuit integrity.

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage circuits in mobile phones and similar portable consumer electronics systems
• Voltage regulation from single battery sources or 2.7 V to 5.5 V input rails
• Portable equipment requiring efficient power management with minimal external component count

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix (e.g., NOPB) against the official datasheet to confirm RoHS compliance and lead-free status. Ensure the package type matches the required footprint, as variations exist within the family. Confirm that the fixed 1.8 V output aligns with the target design specifications before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.8 V output is required without external feedback resistors. It is suitable for designs prioritizing small board space due to the SOT-23-5 package and minimal three-component external configuration. Consider the 2 MHz switching frequency for compatibility with standard passive components.

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 optimized for portable devices. The series offers various fixed voltage options and adjustable versions, providing flexibility for different low-voltage power supply needs in compact electronic systems.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671MFX-1.8/NOPB: Identical electrical specifications with reel packaging instead of cut tape.

Voltage Regulators - DC DC Switching Regulators FAQ

How does the LM3671MF-1.8 manage efficiency at light loads?

It automatically switches to pulse frequency modulation (PFM) mode at light loads, reducing the typical quiescent current to 16 µA to extend battery life.

What is the typical shutdown current for this device?

The typical shutdown current is 0.01 µA, which minimizes battery drain when the device is powered off.