Texas Instruments

LM2574MX-3.3

LM2574MX-3.3 Description

The LM2574MX-3.3 is a fixed-output voltage regulator from Texas Instruments, designed to provide a stable 3.3V output at a maximum current of 500mA. This regulator is part of the SIMPLE SWITCHER® series, renowned for its high efficiency and ease of use in power management applications. The LM2574MX-3.3 operates within an input voltage range of 4V to 40V, making it suitable for a wide range of input power sources. It features a buck topology with a switching frequency of 52kHz, ensuring efficient power conversion and minimal ripple in the output voltage.

The regulator is housed in a 14-pin SOIC package, which is ideal for surface-mount applications, providing a compact and reliable solution for space-constrained designs. The LM2574MX-3.3 is moisture sensitivity level (MSL) rated at 2A (4 weeks), ensuring robustness in various environmental conditions. Despite being marked as obsolete, the LM2574MX-3.3 remains a viable option for legacy systems and applications where its specific features are required.

LM2574MX-3.3 Features

• Fixed Output Voltage: The LM2574MX-3.3 provides a stable 3.3V output, ideal for applications requiring a precise and 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 Efficiency Buck Topology: The buck topology ensures efficient power conversion, minimizing energy loss and heat generation.
• Switching Frequency: The 52kHz switching frequency balances efficiency and output ripple, providing a clean power supply.
• Surface-Mount Package: The 14-pin SOIC package is suitable for surface-mount technology (SMT), offering a compact and reliable solution for modern PCB designs.
• Moisture Sensitivity Level: Rated at MSL 2A (4 weeks), the regulator is designed to withstand various environmental conditions, ensuring long-term reliability.
• SIMPLE SWITCHER® Series: As part of the SIMPLE SWITCHER® series, the LM2574MX-3.3 benefits from Texas Instruments' expertise in power management, offering ease of use and high performance.

LM2574MX-3.3 Applications

The LM2574MX-3.3 is well-suited for a variety of applications where a stable 3.3V power supply is required. Its wide input voltage range and compact form factor make it ideal for:

• Embedded Systems: Providing power to microcontrollers, sensors, and other low-power devices.
• Consumer Electronics: Used in devices such as smartphones, tablets, and portable gaming consoles.
• Industrial Equipment: Powering control systems, PLCs, and other industrial electronics.
• Automotive Applications: Suitable for in-vehicle electronics, where a wide input voltage range is necessary to accommodate varying battery voltages.
• Telecommunications: Powering base stations, routers, and other network equipment.

Conclusion of LM2574MX-3.3

The LM2574MX-3.3 is a robust and versatile fixed-output voltage regulator that offers high efficiency and reliability in a compact package. Its wide input voltage range, buck topology, and 52kHz switching frequency make it an excellent choice for a variety of applications requiring a stable 3.3V power supply. Despite its obsolete status, the LM2574MX-3.3 remains a reliable option for legacy systems and specific applications where its unique features are essential. For designers seeking a proven and efficient power management solution, the LM2574MX-3.3 is a solid choice.