Linear Technology's LTC3850EUF Dual Output Synchronous Step-Down Controller

The LTC3850EUF is a high performance, dual output synchronous step-down switching regulator controller that drives all N-channel power MOSFET stages. A constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz, while a dual N-channel MOSFET synchronous drive provides high efficiency and reduces the external component count.

Key Features:

• Wide Input Voltage Range: The LTC3850EUF operates from a 4.5V to 24V input voltage range, making it suitable for a variety of applications, including industrial, automotive, and telecommunications power systems.
• Dual Output Channels: It provides two outputs that can be set to voltages as low as 0.8V, ensuring compatibility with modern low-voltage digital ICs.
• High Efficiency: The synchronous operation provides efficiency up to 95%, which is enhanced by the use of low RDS(ON) internal switches.
• Adjustable Switching Frequency: The switching frequency is adjustable from 250kHz to 850kHz or can be synchronized to an external clock.
• OPTI-LOOP Compensation: The OPTI-LOOP compensation allows the transient response to be optimized over a wide range of outputs and input voltages.
• Output Overvoltage Protection: The LTC3850EUF includes an overvoltage protection feature that helps prevent damage to downstream components.

Applications:

• Power Distribution Systems
• DSL and Cable Modems, Set-Top Boxes
• Automotive and Industrial Supplies
• DC Power Distribution Systems

The LTC3850EUF is available in a 24-lead plastic QFN package and is rated for operation from –40°C to 85°C, catering to a wide range of environmental conditions. Its advanced design and comprehensive feature set make it an ideal choice for high-performance power conversion applications where efficiency, reliability, and dual output capability are critical.