Texas Instruments

LM25116MHX

LM25116MHX Description

The LM25116MHX from Texas Instruments is a high-performance buck switching controller designed for demanding DC-DC power conversion applications. This obsolete but robust IC features a positive output configuration and drives an external N-channel MOSFET as a transistor driver, enabling efficient step-down voltage regulation. With an input voltage range of 6V to 42V, it supports a switching frequency of 50kHz to 1MHz, adjustable via external components. The 20-pin TSSOP package is optimized for surface-mount designs, offering compact integration. Key functionalities include synchronous rectification, clock synchronization, and advanced control features like enable/disable, soft-start, and frequency modulation.

LM25116MHX Features

• Wide Input Range: Operates from 6V to 42V, suitable for automotive, industrial, and telecom applications.
• Adjustable Frequency: 50kHz–1MHz range allows optimization for efficiency or component size.
• Synchronous Rectification: Enhances efficiency by reducing conduction losses.
• Control Flexibility: Features enable/disable, soft-start, and frequency control for system optimization.
• Clock Synchronization: Supports external clock sync to mitigate noise in multi-converter systems.
• Robust Packaging: 20-TSSOP with MSL 1 (Unlimited) moisture sensitivity, ideal for automated assembly.

LM25116MHX Applications

• Industrial Power Systems: High-efficiency voltage regulation for PLCs, motor drives, and automation equipment.
• Automotive Electronics: Compatible with 12V/24V battery systems for infotainment, ADAS, and lighting.
• Telecom Infrastructure: DC-DC conversion in base stations and networking hardware.
• Distributed Power Architectures: Intermediate bus converters in server and data center PSUs.

Conclusion of LM25116MHX

The LM25116MHX excels in high-voltage buck conversion with its synchronous rectification, wide input range, and flexible control features. While marked obsolete, its design remains relevant for legacy systems requiring reliable, high-efficiency power management. Engineers valuing thermal performance, frequency adjustability, and integration simplicity will find it a compelling choice for industrial, automotive, and telecom applications. For new designs, consider TI’s updated alternatives with similar capabilities.