LM2677SX-12/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677SX-12/NOPB is a high-efficiency step-down switching voltage regulator from the SIMPLE SWITCHER family, manufactured by Texas Instruments. It operates with an input voltage range of 8 V to 40 V and provides a fixed output voltage of 12 V at up to 5 A load current. The device integrates a 0.5 A internal switch and utilizes a buck topology with a fixed switching frequency of 260 kHz. Packaged in TO-263-7 (D2PAK), it supports surface-mount installation and functions within a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 0.5 A power switch for simplified external component requirements
• Features fixed 260 kHz 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
• Input conditioning for microprocessors and DSPs
• Battery-powered equipment requiring efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'SX' indicates tape-and-reel packaging distinct from tube-packaged variants. Confirm the 'NOPB' designation ensures lead-free and RoHS compliance as per manufacturer specifications. Cross-reference the full part number against official TI documentation to ensure correct pinout and thermal pad configuration for the TO-263 package.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this variant when a fixed 12 V output is required rather than adjustable regulation. The 5 A current rating suits moderate-power applications where efficiency and thermal performance are critical. Ensure the input voltage remains within the 8 V to 40 V operational window to maintain stable regulation and protect the integrated switch.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2677 series of SIMPLE SWITCHER regulators, designed for high-efficiency DC-DC conversion. It shares architectural similarities with the LM2676 but offers higher current capability. The series is characterized by minimal external components and robust protection features, making it suitable for space-constrained designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2677S-12/NOPB: Identical electrical specifications but packaged in a tube instead of tape-and-reel.