LM3671TLX-1.8/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671TLX-1.8/NOPB is a fixed-output step-down DC-DC converter from the Texas Instruments LM3671 series, designed for portable applications. It provides a regulated 1.8V output with a maximum load current of 600mA. The device operates within an input voltage range of 2.7V to 5.5V and features a typical switching frequency of 2MHz. It utilizes a DSBGA-5 package (1.41mm x 1.08mm) and 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 efficiency across varying load conditions.
• Internal synchronous rectification ensures high energy conversion efficiency during PWM operation.
• Ultra-low shutdown current minimizes battery drain when the system is powered off.

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage circuits in mobile phones
• Portable consumer electronics systems
• Battery-powered devices requiring efficient step-down regulation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the suffix 'TLX' corresponds to the DSBGA-5 package variant rather than the SOT-23-5 version found in other LM3671 models. Confirm the specific output voltage designation matches the required 1.8V rail. Ensure compatibility with the intended thermal environment and PCB layout constraints associated with the micro-package dimensions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact footprint is critical due to the small DSBGA-5 package size. It is suitable for designs requiring a fixed 1.8V supply from a single-cell lithium-ion battery source. Consider the 2MHz switching frequency for minimizing external passive component sizes while maintaining stable regulation under dynamic loads.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3671 family of high-efficiency buck converters optimized for portable equipment. Unlike automotive-grade variants such as the LM3671-Q1, this standard industrial version is rated for a maximum junction temperature of 85°C. It shares core topology and performance characteristics with other fixed-output members of the series.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671MF-1.8/NOPB offers identical electrical specifications but uses an SOT-23-5 package, requiring PCB layout adaptation.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the difference between the LM3671MFX and LM3671TLX suffixes?

The suffix indicates the physical package type; MFX denotes the SOT-23-5 package, while TLX denotes the smaller DSBGA-5 package.

Does the LM3671TLX-1.8/NOPB support adjustable output voltages?

No, this specific part number provides a fixed 1.8V output. Adjustable versions are available in the same series with different suffixes.