LM2679SX-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2679SX-5.0/NOPB is a monolithic integrated circuit from the SIMPLE SWITCHER® series, functioning as a 5A step-down DC/DC switching regulator. It operates with an input voltage range of 8V to 40V and provides a fixed output voltage of 5.0V. The device utilizes a buck topology with a fixed internal switching frequency of 260kHz. It features a TO-263-7 surface-mount package and supports a maximum output current of 5A. The unit includes built-in thermal shutdown and adjustable current limit protection, operating within a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated low on-resistance DMOS power switch enables high efficiency exceeding 90%.
• Fixed 260kHz internal oscillator allows for the use of smaller external passive components.
• Built-in thermal shutdown and externally programmable peak current limit protect against fault conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Efficient pre-regulators for linear power supply systems
• Direct regulation from bus lines in distributed power architectures
• High-efficiency point-of-load (POL) regulation modules

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify component authenticity through authorized Texas Instruments channels or certified distributors. Confirm that the ordering suffix matches the exact specifications required for your design. Review the latest datasheet revision for any updates regarding mechanical dimensions or electrical characteristics before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this model when a fixed 5V output is required from an 8V to 40V input source. Ensure the application demands up to 5A continuous current capability. Consider the TO-263-7 package for adequate thermal dissipation at higher loads. Verify that the 260kHz switching frequency aligns with electromagnetic interference constraints and inductor size requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2679 family of SIMPLE SWITCHER® regulators, which are designed for straightforward implementation of non-isolated step-down converters. The series offers both fixed and adjustable output versions, providing engineers with flexible options for various power management applications requiring robust performance and minimal external component count.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2679SX-5.0/NOPB is the direct lead-free replacement for the older LM2679SX-5.0 variant. Both parts share identical electrical specifications and pinouts, ensuring drop-in compatibility for existing designs transitioning to RoHS-compliant manufacturing processes.