LM3671LCX-1.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671LCX-1.3/NOPB is a fixed-output step-down DC-DC converter from the Texas Instruments LM3671 family, designed for portable applications. It operates with an input voltage range of 2.7 V to 5.5 V and provides a fixed output voltage of 1.3 V. The device delivers up to 600 mA of load current while maintaining high efficiency through synchronous rectification. It features a typical switching frequency of 2 MHz, allowing for the use of small external components. The static current is typically 16 µA in PFM mode, extending battery life. The component is housed in a compact 6-USON package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous buck topology for high efficiency across load ranges
• Automatic transition between PWM and PFM modes for optimized light-load performance
• Fixed internal feedback network eliminates external resistor requirements
• Built-in overcurrent protection and thermal shutdown mechanisms

Voltage Regulators - DC DC Switching Regulators Applications

• Power supply for low-voltage digital logic circuits in mobile devices
• Battery-powered portable electronics requiring efficient step-down conversion
• Embedded systems powered by single-cell lithium-ion batteries

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'LCX' indicates the 6-USON package variant distinct from SOT-23-5 versions. Confirm the '-1.3' designation matches the required 1.3 V output voltage for your design. Ensure compatibility with the -40°C to +85°C operating temperature range. Check RoHS compliance status as indicated by the '/NOPB' suffix. Validate pinout alignment with the 6-USON footprint during PCB layout.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part when a fixed 1.3 V output is required without external resistors. Choose the LCX package for smaller board space compared to SOT-23-5 variants. Consider the 600 mA current limit for moderate load applications. Evaluate the 2 MHz switching frequency against EMI constraints. Compare static current specifications if ultra-low standby power is critical for the application.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM3671 series of 2 MHz, 600 mA step-down converters. The series includes various packages such as SOT-23-5 and USON, and multiple fixed output voltages. The LM3671 family is optimized for single-cell lithium-ion battery applications in portable systems. Different suffixes denote package type and output voltage settings within the same functional architecture.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671LCX-1.3/NOPBDD is a documented tape-and-reel variant of the same component. Other LM3671 variants with different output voltages or packages may serve as functional substitutes if voltage levels are adjusted via external resistors, though fixed-output parts require exact voltage matching.