LM3673TLX-1.5/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3673TLX-1.5/NOPB is a synchronous step-down DC-DC converter manufactured by Texas Instruments, belonging to the LM3673 series. It provides a fixed output voltage of 1.5 V with a maximum output current capability of 350 mA. The device operates from an input voltage range of 2.7 V to 5.5 V and utilizes a fixed switching frequency of 2 MHz. It features a compact 5-pin DSBGA package (1.41x1.08 mm) designed for surface mount installation. The component supports operation within a temperature range of -30°C to +85°C and includes integrated protection mechanisms such as overcurrent protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates high-side and low-side N-channel MOSFETs for efficient synchronous rectification
• Provides internal compensation to minimize external component count
• Includes cycle-by-cycle current limit and thermal shutdown protection

Voltage Regulators - DC DC Switching Regulators Applications

• Portable battery-powered consumer electronics
• Cellular phones and smartphones
• Personal digital assistants (PDAs)
• MP3 players and portable media devices

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status according to the manufacturer's latest documentation. Confirm the '1.5' designation indicates the fixed 1.5V output variant rather than the adjustable version. Ensure the DSBGA-5 package dimensions match your PCB footprint requirements. Cross-reference the datasheet revision date to ensure all electrical characteristics align with your design specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a small form factor is critical due to its miniature 5-DSBGA packaging. It is suitable for applications requiring a stable 1.5V rail from a single-cell lithium-ion or lithium-polymer battery source. Consider the 2 MHz switching frequency for balancing efficiency against electromagnetic interference (EMI) filtering needs. Evaluate the 350 mA output limit to ensure it meets the peak load requirements of the target circuit without exceeding thermal limits.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3673 family of ultra-small synchronous buck converters. It shares architectural similarities with other members like the LM3671 and LM3677 but differs in output current capacity and specific configuration options. The LM3673 series is optimized for space-constrained portable designs, offering a balance between performance and physical size compared to larger regulator packages.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided reference data.