LM2679SX-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2679SX-12 is a SIMPLE SWITCHER® 5A step-down voltage regulator manufactured by Texas Instruments. It operates with an input voltage range of 8V to 40V and provides a fixed 12V output at up to 5A. The device features a 260kHz switching frequency, 4.2mA quiescent current, and supports surface-mount TO-263 (D2PAK) or VSON-14 packages. It includes adjustable current limiting, thermal shutdown, and soft-start capabilities for robust power management.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated 5A DMOS power switch enables high efficiency exceeding 90% in buck topology applications.
• Fixed 260kHz internal oscillator allows the use of compact external components to minimize board space.
• Adjustable peak current limit protects against overload conditions while maintaining stable regulation.

Voltage Regulators - DC DC Switching Regulators Applications

• Efficient pre-regulators for linear voltage regulators
• Battery charger circuits
• Post-regulation for bus distribution systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify package type compatibility during sourcing, as the LM2679SX suffix typically denotes surface-mount variants like TO-263 or VSON. Confirm RoHS compliance status via official datasheets, as manufacturing revisions may affect environmental certifications. Ensure ordering suffixes match specific thermal and electrical requirements for your design.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this model when a fixed 12V output is required from an 8V-40V input source. It is suitable for designs needing high current capability without external pass transistors. Consider the thermal performance of the chosen package variant under maximum load conditions to ensure reliable operation within the specified temperature range.

Voltage Regulators - DC DC Switching Regulators Part Context

Part of the SIMPLE SWITCHER family designed for simplified power supply development. The LM2679 series integrates control circuitry, oscillators, and protection features into a single monolithic IC. This reduces component count and design complexity compared to discrete solutions, offering a cost-effective approach for medium-power DC/DC conversion tasks.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2679S-12/NOPB serves as a direct equivalent with identical electrical specifications and functionality. Verify pinout and thermal pad configurations between different package options to ensure mechanical compatibility during replacement or upgrade scenarios.