LM2673SD-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2673SD-3.3/NOPB is a SIMPLE SWITCHER® step-down voltage regulator manufactured by Texas Instruments, housed in a 14-VSON package with exposed pad. It provides a fixed 3.3 V output at up to 3 A load current from an input voltage range of 8 V to 40 V. Operating at a fixed switching frequency of 260 kHz, the device integrates a 0.5 A/1.2 A internal switch and supports operation across a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-current power switch for efficient buck conversion
• Fixed 260 kHz switching frequency enables compact external component sizing
• Internal frequency compensation simplifies design implementation
• Thermal shutdown and current limit protection ensure operational reliability

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient DC-DC conversion
• Industrial control system power distribution
• Telecommunications infrastructure power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'SD' corresponds to the 14-VSON package and '3.3' indicates the fixed 3.3 V output variant. Confirm that the 'NOPB' designation ensures compliance with RoHS standards and absence of lead-based materials. Cross-reference the manufacturer part number against official datasheets to validate pinout compatibility and thermal performance specifications before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output is required with up to 3 A capacity. The 260 kHz frequency allows for smaller inductors compared to lower-frequency regulators. Ensure the input voltage remains within the 8 V to 40 V range. Consider the 14-VSON package size for space-constrained PCB layouts and verify thermal dissipation requirements for the intended ambient conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2673 SIMPLE SWITCHER family, which offers a complete solution for step-down conversion. The family includes adjustable and fixed voltage variants in various packages such as TO-220, TO-263, and VSON. The LM2673 series is designed for high efficiency and ease of use, integrating necessary protection features into a single monolithic IC.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2673SDX-ADJ/NOPB: Adjustable voltage version in the same VSON-14 package; requires external resistor network for 3.3 V setting.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum input voltage for the LM2673SD-3.3/NOPB?

The maximum input voltage is 40 V.

Does the LM2673SD-3.3/NOPB support synchronous rectification?

No, the LM2673 uses a non-synchronous buck topology with an integrated power switch.