LM3671LCX-1.8/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671LCX-1.8/NOPB is a fixed-output step-down DC-DC converter from Texas Instruments, providing a stable 1.8V output at up to 600mA load current. It operates within an input voltage range of 2.7V to 5.5V and features a typical switching frequency of 2MHz. The device utilizes synchronous rectification for high efficiency and includes integrated protection against overcurrent conditions. Designed for portable applications, it offers low quiescent current in light-load modes to extend battery life while maintaining compact footprint requirements through minimal external component count.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous buck topology ensures high conversion efficiency across the operating range
• Automatic transition between PWM and PFM modes optimizes performance under varying load conditions
• Integrated overcurrent protection safeguards the device and connected loads during fault events
• Ultra-low shutdown current minimizes power consumption when the system is inactive

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics powered by single-cell lithium-ion batteries
• Mobile phones and similar handheld communication devices
• Low-voltage digital logic circuits requiring regulated power supplies
• Battery-operated medical instrumentation and diagnostic equipment

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the specific suffix 'NOPB' indicates non-rohs-free status if required by your compliance standards, although most modern variants are compliant. Confirm the package type LCX corresponds to the intended PCB layout, typically a small outline transistor or similar surface-mount configuration. Ensure the 1.8V fixed output matches the target rail voltage without requiring external adjustment resistors. Check thermal dissipation requirements based on expected load currents and ambient temperatures to prevent overheating in confined spaces.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Choose this component when a fixed 1.8V rail is needed with moderate current demands up to 600mA. It is suitable for designs prioritizing efficiency and battery longevity in portable form factors. Consider alternative models if adjustable output voltages or higher current capabilities are required. Verify compatibility with the available input voltage sources, ensuring they remain within the 2.7V to 5.5V operational window for reliable regulation and protection functionality.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3671 family of step-down converters designed for mobile and portable applications. The family offers various fixed output voltages and packaging options to suit different design constraints. Similar parts include the LM3671MFX and LM3671TL series, which share core electrical characteristics but differ in package dimensions and pinout configurations. The LCX package provides a compact solution for space-constrained boards.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671LCX-1.8