The SC4517AIML50TRT is a high-efficiency, synchronous step-down (buck) regulator from Semtech Corporation. It is designed for a wide range of applications requiring efficient power conversion from a higher voltage to a lower voltage.

Applications

• Point-of-Load (POL) regulators
• Distributed power systems
• Industrial power supplies
• Networking equipment

Features

• Input Voltage Range: 4.5V to 20V
• Output Voltage: Adjustable, typically 0.8V to Vin
• Maximum Output Current: 5A
• High Efficiency: Up to 95%
• Integrated Synchronous Rectifier
• Current Mode Control
• Adjustable Switching Frequency
• Over-Current and Over-Temperature Protection
• Small Package: MLPQ-UT-16

Benefits

• High efficiency minimizes power loss and heat generation, improving overall system efficiency and reliability.
• Wide input voltage range supports various power supply configurations.
• Adjustable output voltage provides flexibility for different application requirements.
• Integrated synchronous rectifier reduces the number of external components and simplifies the design.
• Over-current and over-temperature protection safeguards the regulator and the load from damage.
• Small package size saves board space.

Additional Details

The SC4517AIML50TRT is based on a constant on-time (COT) control architecture that provides excellent transient response and stable operation. The integrated synchronous rectifier eliminates the need for an external Schottky diode, further improving efficiency and reducing component count. The adjustable switching frequency allows for optimization of efficiency and component size. The regulator also features built-in protection mechanisms, such as over-current and over-temperature protection, to ensure reliable operation. The MLPQ-UT-16 package provides good thermal performance in a small footprint.