Texas Instruments

LM2576T-3.3/LB03

LM2576T-3.3/LB03 Description

The LM2576T-3.3/LB03 is a fixed output voltage regulator from Texas Instruments, part of the SIMPLE SWITCHER® series. This through-hole mounted IC is designed to provide a stable 3.3V output at a maximum current of 3A. It operates within a wide input voltage range of 4V to 40V, making it suitable for various power supply applications. The regulator features a buck topology with a switching frequency of 52kHz, ensuring efficient power conversion. The LM2576T-3.3/LB03 is housed in a TO220-5 package, which offers robust thermal performance and ease of integration into printed circuit boards. Despite being marked as obsolete, this regulator remains a reliable choice for applications requiring a fixed 3.3V output.

LM2576T-3.3/LB03 Features

• Fixed Output Voltage: The LM2576T-3.3/LB03 provides a stable 3.3V output, ideal for applications requiring a consistent power supply.
• Wide Input Voltage Range: With an input voltage range of 4V to 40V, this regulator can accommodate a variety of power sources, enhancing its versatility.
• High Output Current: Capable of delivering up to 3A, it supports high-power devices and systems.
• Buck Topology: Utilizing a buck converter topology, the LM2576T-3.3/LB03 offers high efficiency and compact design.
• Switching Frequency: The 52kHz switching frequency ensures efficient power conversion with minimal heat generation.
• Through-Hole Mounting: The TO220-5 package is designed for through-hole mounting, providing robust mechanical stability and ease of integration.
• Moisture Sensitivity Level: Rated at MSL 1 (Unlimited), the regulator is suitable for a wide range of environmental conditions.
• REACH Compliance: The LM2576T-3.3/LB03 is REACH unaffected, ensuring compliance with environmental regulations.
• Obsolete Status: While marked as obsolete, the regulator remains a reliable choice for existing designs and legacy systems.

LM2576T-3.3/LB03 Applications

The LM2576T-3.3/LB03 is well-suited for a variety of applications requiring a stable 3.3V power supply. Some specific use cases include:

• Embedded Systems: Providing power to microcontrollers, sensors, and other low-voltage components.
• Communication Equipment: Supplying power to routers, switches, and other networking devices.
• Industrial Control Systems: Ensuring reliable power for PLCs, actuators, and other industrial components.
• Consumer Electronics: Powering devices such as set-top boxes, gaming consoles, and other consumer products.
• Automotive Electronics: Suitable for in-vehicle systems requiring a stable power supply.

Conclusion of LM2576T-3.3/LB03

The LM2576T-3.3/LB03 is a robust and versatile fixed output voltage regulator ideal for applications requiring a stable 3.3V supply. Its wide input voltage range, high output current, and efficient buck topology make it a reliable choice for a variety of power management needs. Despite its obsolete status, the regulator remains a valuable component for existing designs and legacy systems. Its compliance with environmental regulations and robust mechanical design further enhance its appeal. For engineers and designers seeking a dependable power solution, the LM2576T-3.3/LB03 is a proven and effective option.