LM2576T-12 Voltage Regulator by Texas Instruments

The LM2576T-12 is a highly efficient, monolithic integrated circuit voltage regulator designed and manufactured by the reputable Texas Instruments. This versatile component is part of the LM2576 series, which are step-down voltage regulators capable of driving a 3A load with excellent line and load regulation.

Key Features

• Output Voltage: The LM2576T-12 provides a fixed output voltage of 12V, which is suitable for a wide range of applications in electronics that require a stable supply voltage.
• Output Current: Capable of delivering up to 3A of output current, it can power a significant number of devices and integrated circuits.
• High Efficiency: With a typical efficiency of 77% to 90%, depending on the load and input voltage, it ensures minimal heat generation and energy loss.
• Wide Input Voltage Range: The regulator can handle input voltages from 4.75V to 40V, making it versatile for use in various power supply scenarios.
• Thermal Shutdown and Current Limit Protection: Built-in safety features protect the device from over-current conditions and excessive temperature, enhancing its reliability and longevity.
• Simple External Components: Requires minimal external components for operation, typically a couple of capacitors and an inductor, simplifying design and reducing overall system cost.
• 52 kHz Fixed Frequency Internal Oscillator: The fixed frequency simplifies noise filtering in noise-sensitive applications and allows for the use of smaller external components.

Applications

The LM2576T-12 is ideal for a variety of applications, such as:

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

Package and Availability

The device is available in a TO-220 package, which is widely used and easy to handle in terms of mounting and heat dissipation. The LM2576T-12 is part of Texas Instruments' support for legacy designs, ensuring availability and support for ongoing and new projects alike.

For detailed specifications, application notes, and further information, designers and engineers are encouraged to consult the official Texas Instruments datasheets and product manuals.