The LM2575T-3.3 from Texas Instruments is a robust and versatile step-down voltage regulator designed to deliver a fixed output voltage of 3.3V. This regulator is a part of the LM2575 series, which is well-known for its ease of use and comprehensive features. With its ability to handle a maximum input voltage of 40V and output currents of up to 1A, the LM2575T-3.3 is an excellent choice for a wide range of applications, including consumer electronics, embedded systems, and industrial hardware.

Key Features

• Output Voltage: Fixed 3.3V with a tolerance of ±4% over line, load, and temperature variations.
• Output Current: Capable of delivering up to 1A of continuous output current.
• Input Voltage Range: Operates with an input range of 4V to 40V, making it suitable for a variety of input sources.
• Efficiency: Features high efficiency, with a typical value of 77% at 500mA load, reducing power loss and heat generation.
• Thermal Shutdown and Current Limit: Built-in protection features guard against overheating and overcurrent conditions.
• Frequency: Operates at a fixed frequency of 52kHz, allowing for the use of smaller external components.
• Package: Available in a TO-220 package, which is suitable for through-hole mounting and easy integration into various circuit designs.

Applications

The LM2575T-3.3 is ideal for a broad spectrum of applications. It is commonly used in:

• Simple high-efficiency step-down (buck) regulators.
• Efficient pre-regulators for linear regulators.
• On-card switching regulators.
• Positive to negative converter (Buck-Boost).

Design Support

Texas Instruments provides extensive design support for the LM2575T-3.3, including datasheets, application notes, and simulation tools to assist engineers in implementing the regulator into their designs. This support ensures a smooth design process and helps to minimize time to market for products incorporating the LM2575T-3.3.