The LM25088MH-2 is a high-voltage synchronous buck regulator controller from Texas Instruments (formerly National Semiconductor). It is designed for applications requiring efficient step-down conversion from high input voltages. This controller offers a wide input voltage range and incorporates features to simplify design and minimize external components.

Applications

• Automotive power supplies
• Industrial power supplies
• Telecom power systems
• Distributed power architectures
• Battery-powered systems

Features

• Wide input voltage range
• Synchronous rectification for high efficiency
• Adjustable output voltage
• Programmable switching frequency
• Current-mode control
• Over-voltage and over-current protection
• Thermal shutdown

Benefits

• Enables efficient power conversion from high voltage sources, reducing power loss and heat generation.
• Simplifies design with integrated features and minimal external components.
• Provides flexibility to adjust the output voltage according to application requirements.
• Protects the circuit from damage due to over-voltage, over-current, and over-temperature conditions.
• Offers stable and reliable operation over a wide range of input voltages and load conditions.

Additional Details

The LM25088MH-2 operates using a constant on-time control architecture, providing excellent transient response and load regulation. It supports a wide range of switching frequencies, allowing designers to optimize the circuit for efficiency or size. The integrated synchronous rectifier significantly improves efficiency compared to traditional diode-based buck converters. The device also includes comprehensive protection features, such as over-voltage protection (OVP), over-current protection (OCP), and thermal shutdown, ensuring robust and reliable operation. The current-mode control architecture provides inherent line feedforward, resulting in excellent line transient response. The small size and integrated features make it suitable for space-constrained applications.