LM2679SDX-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2679SDX-3.3/NOPB is a Texas Instruments SIMPLE SWITCHER® step-down switching voltage regulator in a VSON-14 surface-mount package. It provides a fixed 3.3V output with a maximum load current of 5A. The device operates from an input voltage range of 8V to 40V and features a fixed 260kHz switching frequency. Key electrical parameters include a quiescent current of 4.2mA, a minimum operating temperature of -40°C, and a maximum operating temperature of +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-efficiency DMOS power switch for step-down conversion
• Utilizes SIMPLE SWITCHER design philosophy requiring minimal external components
• Includes internal soft-start circuitry to limit inrush current during startup
• Features built-in thermal shutdown and adjustable current limiting protection

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Input voltage step-down for battery-powered devices
• Post-regulation for standard 5V or 12V bus voltages

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number includes the /NOPB suffix to confirm lead-free compliance and specific packaging configuration. Confirm the VSON-14 package variant matches your PCB footprint requirements. Ensure the fixed 3.3V output version aligns with your system voltage needs rather than the adjustable model.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output at up to 5A is required within an 8V to 40V input range. The VSON-14 package is suitable for space-constrained surface-mount designs. Consider the 260kHz frequency for balancing component size against switching losses. Verify that the thermal performance of the VSON-14 package meets the application's heat dissipation requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2679 series of monolithic integrated step-down converters. The series offers both fixed and adjustable output versions, designed to drive loads up to 5A with excellent line and load regulation. The SIMPLE SWITCHER architecture simplifies design by minimizing external component count while maintaining high efficiency across various operating conditions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM2679SD-3.3/NOPB serves as a direct equivalent without the 'X' reel designation suffix. Other family members like the LM2679S-ADJ/NOPB provide adjustable outputs but differ in functionality.