LM2678SDX-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678SDX-ADJ/NOPB is a SIMPLE SWITCHER® step-down DC/DC switching regulator manufactured by Texas Instruments. It operates with an input voltage range of 8V to 40V and provides a maximum output current of 5A. The device features an adjustable output voltage ranging from 1.21V to 37V. It utilizes a fixed switching frequency of 260kHz and incorporates internal compensation for simplified design. The component is housed in a VSON-14 surface-mount package and supports operation temperatures from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated power switch capable of delivering up to 5A load current
• Fixed 260kHz switching frequency eliminates need for external compensation
• Internal frequency compensation simplifies external component selection
• Operates over extended industrial temperature range

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Distributed power architectures requiring high efficiency
• Battery-powered equipment with wide input voltage ranges
• Industrial control systems and instrumentation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'SDX' corresponds to the VSON-14 package variant as indicated in distributor catalogs. Confirm RoHS compliance status via the official datasheet, noting that 'NOPB' typically denotes lead-free and halogen-free construction. Ensure the ordering part number matches the required tape-and-reel packaging format for automated assembly processes.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a buck converter topology is required for inputs between 8V and 40V. It is suitable for designs needing up to 5A continuous output current with adjustable voltage settings. Consider the VSON-14 package for space-constrained PCB layouts. Verify thermal management requirements given the power dissipation at higher load currents and input-output differentials.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2678 series of SIMPLE SWITCHER regulators. It shares functional similarities with the LM2673 and LM2679 but offers distinct current ratings and package options. The SDX variant specifically denotes the small outline no-lead package configuration, distinguishing it from through-hole or larger surface-mount alternatives within the same family.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include the LM2678S-ADJ/NOPB (TO-263 package) and LM2678SX-ADJ/NOPB (TO-263 package). For lower current applications, the LM2673 series may be considered. Verify pinout compatibility and thermal performance when transitioning between package types.