LM2676SX-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2676SX-ADJ/NOPB is a SIMPLE SWITCHER high-efficiency 3A step-down voltage regulator from Texas Instruments. It operates with an input voltage range of 8V to 40V and provides an adjustable output voltage between 1.2V and 37V. The device features a fixed switching frequency of 260kHz, enabling the use of small external components. It delivers up to 3A of output current in a TO-263-7 (D2PAK) surface-mount package. The regulator includes internal thermal shutdown and current limiting for robust protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-current power switch capable of delivering 3A load current
• Adjustable output voltage range from 1.2V to 37V via external resistor divider
• Fixed 260kHz switching frequency minimizes required passive component size
• Built-in thermal shutdown and cycle-by-cycle current limiting for fault protection

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient step-down conversion
• Industrial control systems with wide input voltage ranges
• Telecommunications infrastructure power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix NOPB indicates lead-free/RoHS compliance when sourcing. Confirm the package designation SX corresponds to the TO-263-7 form factor. Ensure the ADJ variant is selected for adjustable output requirements rather than fixed voltage options. Cross-reference datasheet revisions to confirm pinout consistency with existing designs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when an input voltage up to 40V must be stepped down to an adjustable level below 37V. The 3A current rating suits moderate power applications where efficiency is critical. The 260kHz frequency allows for compact inductor selection compared to lower-frequency alternatives. Consider thermal management requirements given the D2PAK package's heat dissipation characteristics under full load.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2676 family of SIMPLE SWITCHER regulators, designed for high-efficiency DC-DC conversion. It serves as a non-synchronous buck converter alternative to synchronous counterparts like the LM2679. The family emphasizes ease of design with minimal external component count. The LM2676SX-ADJ specifically offers flexibility through its adjustable output configuration within the standard 3A performance class.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2676SX-5.0/NOPB provides a fixed 5V output instead of adjustable. LM2676SX-12/NOPB provides a fixed 12V output. LM2679SX-ADJ/NOPB offers 5A current capability with similar voltage ranges but may require different thermal handling.