LM2679SD-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2679SD-3.3/NOPB is a SIMPLE SWITCHER® 5A step-down voltage regulator from Texas Instruments, operating with an input voltage range of 8V to 40V and providing a fixed 3.3V output. It utilizes a buck topology with a switching frequency of 260kHz and supports up to 5A continuous output current. The device features adjustable current limiting, shutdown capability, and operates within a temperature range of -40°C to +125°C. Packaged in a VSON-14 surface-mount format, it integrates all active components for high-efficiency DC/DC conversion.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated SIMPLE SWITCHER controller with adjustable current limit protection
• High efficiency operation exceeding 90% through low on-resistance internal switch
• Fixed 3.3V output configuration with single output channel
• Shutdown pin functionality for power management

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Power supply stages for industrial control equipment
• Voltage conversion for communication infrastructure modules

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number includes the /NOPB suffix to ensure compliance with RoHS standards and lead-free manufacturing specifications. Confirm the package type matches the required VSON-14 footprint for PCB layout compatibility. Check datasheet revisions for any updates to thermal characteristics or electrical limits before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output at 5A is required from an 8V to 40V input source. The VSON-14 package suits space-constrained surface-mount designs. Consider the LM2679T variant if through-hole mounting is necessary, or the ADJ version if programmable output voltage is needed instead of the fixed 3.3V specification.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2679 series of SIMPLE SWITCHER regulators, designed for high-current step-down applications. It shares core architecture with other variants like the LM2679SD-ADJ and LM2679T-12, differing primarily in output voltage configuration and package style. The series emphasizes simplicity in external component count while maintaining robust performance under varying load conditions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacement options include the LM2679SD-3.3/NOPB for identical specifications. For non-RoHS requirements, the legacy LM2679SD-3.3 may be considered, though it is discontinued. Alternative packages such as the TO-220-7 (LM2679T-3.3) offer equivalent electrical performance with different mounting constraints.