Texas Instruments

LM2574N-3.3/NOPB  

DC Switching Voltage Regulators

LM2574N-3.3/NOPB Description

The LM2574N-3.3/NOPB from Texas Instruments is a fixed 3.3V output, step-down (buck) switching voltage regulator designed for efficient power conversion in a wide range of applications. Part of the SIMPLE SWITCHER® series, this IC integrates a 52kHz oscillator, high-efficiency buck converter, and thermal shutdown protection, delivering up to 500mA of output current with an input voltage range of 4V to 40V. Housed in an 8-pin DIP package, it is suitable for through-hole mounting, making it ideal for prototyping and industrial designs. The device complies with ROHS3 and REACH standards, ensuring environmental and safety compliance.

LM2574N-3.3/NOPB Features

• Fixed 3.3V Output: Eliminates the need for external feedback resistors, simplifying design.
• Wide Input Range (4V–40V): Supports diverse power sources, including automotive and industrial supplies.
• High Efficiency (Up to 80%): Reduces heat dissipation and improves energy savings.
• Low Standby Current (50µA typ.): Enhances battery-operated applications.
• Built-in Protection: Includes thermal shutdown and current limiting for robust operation.
• 52kHz Switching Frequency: Minimizes external component size while maintaining low noise.
• Non-Synchronous Rectification: Cost-effective for moderate current applications.
• MSL1 (Unlimited): Suitable for long-term storage without moisture sensitivity concerns.

LM2574N-3.3/NOPB Applications

• Embedded Systems: Powering microcontrollers, sensors, and FPGAs in 3.3V logic circuits.
• Automotive Electronics: Voltage regulation for infotainment, telematics, and body control modules.
• Industrial Controls: Reliable power supply for PLCs, motor drives, and instrumentation.
• Consumer Electronics: Used in set-top boxes, routers, and portable devices requiring stable 3.3V rails.
• Battery-Powered Devices: Ideal for IoT nodes, wearables, and handheld equipment due to low quiescent current.

Conclusion of LM2574N-3.3/NOPB

The LM2574N-3.3/NOPB is a versatile, high-performance buck regulator offering simplicity, efficiency, and reliability for 3.3V power systems. Its wide input range, integrated protections, and compact design make it superior to linear regulators in efficiency and to complex switchers in ease of use. Whether for industrial, automotive, or consumer applications, this IC provides a cost-effective, space-saving solution with minimal external components. Texas Instruments’ reputation for quality ensures long-term availability and support, making it a preferred choice for engineers.

LM2574N-3.3/NOPB Documents

Download datasheets and manufacturer documentation for LM2574N-3.3/NOPB

PCN Assembly/Origin :

Assembly Site 17/Dec/2021      

Datasheets :

LM2574 Series Datasheet      

PCN Design/Specification :

Mold Compound Updated 10/Jul/2014       LM2574/LM2574HV 05/Sep/2018