The LTC3803IS6-5#TRPBF is a high-performance, constant frequency, current mode flyback DC/DC controller from Linear Technology, designed to simplify the implementation of a compact and efficient power supply. This device is tailored for applications requiring a minimal number of external components, making it an ideal solution for space-constrained environments.

Key Features

• Constant Frequency Operation: The LTC3803IS6-5#TRPBF operates at a fixed frequency of 200kHz, providing a predictable noise spectrum and simplifying the filtering of noise-sensitive applications.
• Wide Input Voltage Range: This controller accommodates a broad input voltage range, making it versatile for various applications, from portable devices to industrial systems.
• Low Startup and Operating Current: The device boasts a low startup current of just 10µA and an operating current of 2mA, enhancing the efficiency of the overall power supply.
• Current Mode Operation: The current mode control scheme ensures fast transient response and excellent loop stability.
• No Transformer Third Winding or Opto-Isolator Required for Regulation: The LTC3803IS6-5#TRPBF eliminates the need for complex feedback mechanisms, simplifying design and reducing component count.
• Internal Soft-Start: The built-in soft-start function minimizes inrush current during startup, contributing to the reliability and longevity of the system.
• Thermal Protection: Over-temperature protection is integrated to safeguard the device under extreme operating conditions.

Applications

The LTC3803IS6-5#TRPBF is suitable for a wide range of applications, including but not limited to:

• Isolated Telecom Power Supplies
• Industrial Power Supplies
• Power Over Ethernet (PoE) Systems
• Secondary Side Regulation
• Portable Devices

Product Packaging

The device comes in a compact SOT-23 package, which is ideal for space-constrained applications. The LTC3803IS6-5#TRPBF is also available in tape and reel packaging (TRPBF suffix) for automated assembly processes, ensuring efficient manufacturing and reduced production costs.

With its robust feature set and compact form factor, the LTC3803IS6-5#TRPBF from Linear Technology stands out as a high-performance solution for efficient power supply design in a variety of demanding applications.