LTC3803ES6-3#TRMPBF: Constant Frequency Current Mode Flyback DC/DC Controller

The LTC3803ES6-3#TRMPBF is a high-performance, constant frequency, current mode flyback DC/DC controller from Linear Technology, now part of Analog Devices. This compact and efficient controller is designed for isolated and non-isolated power supply applications, making it a versatile choice for a wide range of electronic devices. Its small form factor and robust feature set ensure that it can be used in space-constrained applications while delivering high efficiency and reliability.

Key Features:

• Constant Frequency Operation: The LTC3803ES6-3#TRMPBF operates at a fixed frequency of 200kHz, which allows for the use of small inductors and capacitors, resulting in compact power supply designs.
• Wide Input Voltage Range: This controller supports a wide input voltage range from 9V to 36V, accommodating various input sources and providing flexibility in design.
• No Opto-Isolator Required for Regulation: The design of the LTC3803ES6-3#TRMPBF eliminates the need for an opto-isolator for output voltage regulation in many applications, simplifying the design and improving reliability.
• Low Startup Current: With a startup current of just 20uA, the device ensures efficient operation right from the initial power-up sequence.
• Low Operating Current: The operating current is also kept low at 300uA, which enhances overall efficiency, especially in battery-powered applications.
• Adjustable Soft-Start: An adjustable soft-start function limits inrush current during startup, providing additional protection to the power supply components.
• Thermal Shutdown: The LTC3803ES6-3#TRMPBF incorporates thermal shutdown functionality, protecting the device from damage due to overheating.
• Compact Package: The device comes in a small SOT-23 package, which is ideal for space-constrained applications.

Applications:

• Isolated Telecom Power Supplies
• Industrial Power Supplies
• Medical Equipment
• Auxiliary Power Supplies
• Power over Ethernet (PoE) Systems

The LTC3803ES6-3#TRMPBF is a testament to Linear Technology's commitment to providing innovative solutions for power management challenges. Its combination of features, efficiency, and compact size make it a top choice for designers looking to create reliable and high-performance power systems.