Texas Instruments

LM22676MRX-ADJ

LM22676MRX-ADJ Description

The LM22676MRX-ADJ from Texas Instruments is a high-efficiency step-down (buck) switching regulator designed for DC-DC conversion in demanding power management applications. It operates over a wide input voltage range of 4.5V to 42V, delivering an adjustable output voltage from 1.285V to 37V at a maximum output current of 3A. Packaged in an 8-pin HSOIC EP with exposed thermal pad, it ensures efficient heat dissipation and is supplied in tape and reel (T/R) for automated assembly.

LM22676MRX-ADJ Features

• High Efficiency (90% Min): Optimized for minimal power loss, ideal for battery-powered and energy-sensitive systems.
• Wide Input Range (4.5V–42V): Supports diverse power sources, including automotive and industrial supplies.
• Adjustable Output (1.285V–37V): Flexible for multiple voltage requirements with a single device.
• High Switching Frequency (400–600kHz): Enables compact inductor and capacitor selection, reducing PCB footprint.
• Robust Thermal Performance: HSOIC EP package with 1.55mm max height ensures reliable operation up to 125°C.
• Low Quiescent Current (3.4mA Typ): Enhances efficiency in light-load conditions.
• Fixed-Frequency PWM Control: Provides stable, low-noise output for sensitive applications.

LM22676MRX-ADJ Applications

• Industrial Power Systems: Suitable for factory automation, PLCs, and motor control due to wide input tolerance.
• Automotive Electronics: Powers infotainment, ADAS, and lighting systems (note: not PPAP/automotive-qualified).
• Telecom/Networking Equipment: Efficiently steps down high-voltage rails for FPGAs, ASICs, and processors.
• Portable Devices: Ideal for battery-operated tools and medical devices requiring high efficiency.
• Distributed Power Architectures: Used in point-of-load (POL) regulation for servers and data centers.

Conclusion of LM22676MRX-ADJ

The LM22676MRX-ADJ excels in high-voltage, high-current DC-DC conversion with its adjustable output, compact design, and superior thermal performance. While not RoHS-compliant or automotive-grade, its wide input range and 90% efficiency make it a versatile choice for industrial, telecom, and portable applications. Engineers benefit from its simplified PCB layout (8-pin HSOIC EP) and stable switching operation, reducing design complexity and BOM costs. For systems requiring reliable step-down regulation under harsh conditions, this regulator delivers a robust solution.