Linear Technology LTC3809EDD-1 Low EMI, No RSENSE™ Synchronous Step-Down DC/DC Controller

The LTC3809EDD-1 is a high-performance, synchronous step-down DC/DC controller from Linear Technology that delivers exceptional power efficiency and thermal performance in a compact package. It is specifically designed to meet the rigorous demands of power regulation in a wide variety of electronic applications, including telecommunications, networking equipment, and portable devices.

Key Features:

• No RSENSE™ Technology: The LTC3809EDD-1 utilizes Linear Technology's proprietary No RSENSE current sensing technology, which eliminates the need for a sense resistor, thereby reducing power loss and improving efficiency.
• Low Electromagnetic Interference (EMI): Engineered with an emphasis on minimizing EMI, this controller is ideal for noise-sensitive applications. Its phase-locked loop (PLL) design allows for frequency synchronization to an external clock, further reducing EMI.
• High Efficiency: With its integrated synchronous rectification and powerful gate drivers, the LTC3809EDD-1 achieves high conversion efficiency, which is critical for reducing heat and extending battery life in portable applications.
• Wide Input Voltage Range: The controller supports a wide input voltage range from 2.75V to 9.8V, making it versatile for a variety of power sources.
• Adjustable Switching Frequency: The switching frequency is adjustable from 300kHz to 4MHz, allowing designers to optimize the size of external components and the performance of the power supply.
• Compact Design: Housed in a small 3mm x 3mm DFN package, the LTC3809EDD-1 saves board space and is suitable for space-constrained applications.

Applications:

• Telecommunications Infrastructure
• Networking Equipment
• Portable Electronic Devices
• Industrial and Automotive Systems

The LTC3809EDD-1 is a testament to Linear Technology's commitment to providing innovative power management solutions that combine performance, efficiency, and compact design. It is an ideal choice for designers looking to optimize their power supply designs with a reliable, high-quality DC/DC controller.