LM3673TLX-1.8/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3673TLX-1.8/NOPB is a synchronous step-down DC-DC converter manufactured by Texas Instruments, designed for applications requiring efficient power conversion within a compact footprint. This device operates with a fixed output voltage of 1.8 V and delivers a maximum continuous output current of 350 mA. It integrates an internal high-side and low-side MOSFETs to achieve high efficiency across the load range. The converter functions with an input voltage range from 2.7 V to 5.5 V. It utilizes a fixed switching frequency of 2 MHz, allowing for the use of small external inductors and capacitors. The component is housed in a 5-pin DSBGA package measuring 1.41 mm by 1.08 mm. It supports operation over an ambient temperature range of -30°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous rectification with internal high-side and low-side power switches for enhanced efficiency.
• Features a fixed 2 MHz switching frequency to minimize external passive component size.
• Includes comprehensive protection mechanisms such as thermal shutdown and cycle-by-cycle current limiting.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics powered by single-cell lithium-ion or lithium-polymer batteries
• Embedded systems requiring regulated low-voltage rails for microcontrollers and logic circuits
• Battery-powered devices needing efficient step-down conversion from 3.7V nominal sources

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the specific suffix '1.8' corresponds to the fixed 1.8 V output variant, distinct from the adjustable version. Confirm RoHS compliance status via the manufacturer's official documentation. Ensure the ordering part number matches the exact package type and tape/reel specifications required for your assembly process. Cross-reference the datasheet revision date to ensure alignment with your design requirements.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.8 V output is required without the need for external feedback resistors. It is suitable for designs prioritizing board space savings due to the small DSBGA package. Consider the 350 mA current limit when sizing the load; if higher current is needed, evaluate the LM3671 series. Ensure the input voltage source remains within the 2.7 V to 5.5 V operational window for reliable regulation.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM3673 family of miniature step-down converters from Texas Instruments. The family focuses on providing efficient power management for battery-operated portable applications. The LM3673 series differentiates itself through integrated power switches and high-frequency operation, enabling significant reduction in solution size compared to older generations of buck regulators.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. For potential replacements, consult the manufacturer's official cross-reference tools or application notes for equivalent performance characteristics in terms of current rating, voltage range, and package dimensions.