LM2678SDX-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678SDX-ADJ is a SIMPLE SWITCHER high-efficiency 5A step-down voltage regulator manufactured by Texas Instruments. It operates with an input voltage range of 8V to 40V and provides an adjustable output voltage from 1.21V to 37V. The device features a fixed switching frequency of 260kHz, enabling the use of compact passive components. It includes integrated feedback reference, error amplifier, current-limited power switch, and freewheeling diode. The regulator supports operation over a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic buck converter topology simplifying design
• Fixed 260kHz switching frequency for optimized component size
• Built-in thermal shutdown and current limiting protection

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for digital signal processors
• Battery-powered systems requiring efficient step-down conversion
• General-purpose DC/DC power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix configuration against the manufacturer datasheet to ensure compatibility with required output voltage ranges and package variants. Confirm RoHS compliance status and lead times through authorized distributors. Cross-reference part numbers with official TI documentation to avoid substitution errors due to minor packaging or specification differences.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust 5A buck converter is needed with minimal external circuitry. The fixed frequency allows for smaller inductors and capacitors compared to lower-frequency alternatives. Ensure input voltage stays within the 8V to 40V limit and verify thermal management requirements for the VSON-14 package under maximum load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2678 series of SIMPLE SWITCHER regulators, designed for high-efficiency step-down applications. It integrates the power switch and control logic into a single IC, reducing board space and assembly complexity. The series is known for its ease of use and reliability in industrial and consumer electronics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2678SX-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators FAQ

What is the minimum input voltage for the LM2678SDX-ADJ?

The minimum operating input voltage is 8V.

Does the LM2678SDX-ADJ include short-circuit protection?

Yes, it features internal current limiting and thermal shutdown protection.