The LT3573EMSE#PBF is a cutting-edge DC/DC converter integrated circuit from Linear Technology, designed to simplify the design of isolated power supplies. It is a versatile component that can be used in a variety of applications requiring isolated power, such as industrial controls, medical equipment, and isolated data communication systems.

Key Features

• Integrated Transformer Driver: The LT3573 features an internal 1.25A switch that drives a low-profile 1:1 coupled inductor, simplifying the design of isolated power supplies.
• Wide Input Voltage Range: It operates over a wide input range of 3V to 40V, making it suitable for a variety of input sources, including automotive and industrial supplies.
• Adjustable Output Voltage: The output voltage is easily set by two external resistors and can be up to several hundred volts, depending on the transformer turns ratio, allowing for great flexibility in design.
• Low Quiescent Current: The quiescent current of the LT3573 is a mere 3µA when the part is in shutdown, ensuring energy efficiency in standby modes.
• No Opto-Isolator Required: Its unique design eliminates the need for an opto-isolator for feedback, as the output voltage is sensed from the primary-side waveform.
• Multiple Protections: The device includes features such as soft-start, boundary mode operation, and short-circuit protection, enhancing the reliability and safety of the power supply.

Applications

The LT3573EMSE#PBF is ideal for a wide range of applications including, but not limited to:

• Isolated Flyback Converters
• Medical Diagnostic Equipment
• Industrial Control Supplies
• Isolated Data Communication Devices

Product Specifications

Parameter Value Part Number LT3573EMSE#PBF Input Voltage 3V to 40V Internal Switch Current 1.25A Shutdown Quiescent Current 3µA Operating Temperature Range -40°C to 125°C Package Type MSOP-16

With its robust design and ease of use, the LT3573EMSE#PBF from Linear Technology is an excellent choice for designers looking to implement isolated power supplies with minimal external components and complexity.