LM2678SX-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678SX-ADJ/NOPB is a monolithic integrated circuit designed as a high-efficiency step-down DC/DC switching regulator. It operates with an input voltage range of 8 V to 40 V and delivers up to 5 A of output current. The adjustable output voltage spans from 1.2 V to 37 V. Key electrical parameters include a fixed switching frequency of 260 kHz, a maximum static current of 4.2 mA, and an operating temperature range from -40 °C to +125 °C. The device utilizes a TO-263-7 surface-mount package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates all active components required for buck converter topology into a single monolithic IC
• Achieves high efficiency exceeding 90% through low on-resistance DMOS power switches
• Provides excellent line and load regulation characteristics across the operating range

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in distributed power systems
• Pre-regulator stages for downstream linear regulators
• Efficient battery-powered systems requiring step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix configuration against the manufacturer datasheet to ensure compatibility with RoHS standards and lead-free requirements. Confirm that the TO-263-7 package dimensions match the target PCB footprint. Check for any process change notifications or end-of-life status updates from Texas Instruments prior to finalizing procurement plans.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust, high-current buck converter solution is needed with minimal external component count. The fixed 260 kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Ensure the thermal design accommodates the TO-263 package's heat dissipation capabilities under maximum load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the SIMPLE SWITCHER family of regulators from Texas Instruments. It shares architectural similarities with the LM2679 series but differs in input voltage specifications and internal switch ratings. The LM2678SX-ADJ serves as the adjustable voltage variant within the LM2678 product line, offering flexibility for custom output voltage requirements.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers: LM2678S-ADJ/NOPB, LM2678SD-5.0/NOPB.