LM2676SX-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2676SX-3.3/NOPB is a SIMPLE SWITCHER® high-efficiency 3A step-down voltage regulator manufactured by Texas Instruments. It operates with an input voltage range of 8V to 40V and provides a fixed 3.3V output. The device integrates a 1.5A internal switch and supports a switching frequency of 260kHz. It utilizes a TO-263-7 (D2PAK) surface-mount package and functions within a junction temperature range of -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 1.5A power switch for simplified external component requirements
• Operates at a fixed 260kHz switching frequency to minimize passive component size
• Includes thermal shutdown and current limit protection for system reliability

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient step-down conversion
• General-purpose 3.3V power supply generation from higher voltage rails

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'SX' corresponds to the TO-263-7 package variant when sourcing. Confirm 'NOPB' indicates lead-free and RoHS compliance status per the manufacturer's latest documentation. Ensure the specific output voltage version matches the required 3.3V specification, as other fixed voltage options exist within the same family.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for designs requiring a fixed 3.3V output with up to 3A load capability. The TO-263-7 package offers improved thermal performance compared to smaller footprints. Verify that the input voltage remains within the 8V to 40V operational window and that the 260kHz frequency aligns with inductor selection constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2676 SIMPLE SWITCHER® family of buck regulators. It shares core architecture with variants offering different fixed output voltages and alternative packages such as the SD (VSON) or T (TO-220). The SX designation specifically identifies the D2PAK/TO-263 form factor optimized for surface-mount assembly.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2676SX-3.3/NOPB is the direct equivalent part number. Other output voltage variants like LM2676SX-5.0/NOPB share identical electrical characteristics except for the regulated output level.