LM2574N-3.3/NOPB – TEXAS INSTRUMENTS

The LM2574N-3.3/NOPB is a 3.3V, 1A step-down switching regulator in a TO-263-5 (PDIP-5) surface mount package, featuring a lead-free, RoHS-compliant construction. This specific part number designates a fixed-output voltage of 3.3V, eliminating the need for external voltage adjustment components, simplifying design and reducing board space. The device operates from an input voltage range of 7V to 38V, making it suitable for applications with fluctuating input power sources, such as battery-powered systems or those utilizing unregulated wall adapters. Its internal switching frequency of approximately 52kHz minimizes external filter component size, further contributing to compact circuit design._x000D_
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The LM2574N-3.3/NOPB incorporates features like short-circuit protection, thermal shutdown, and current limiting, ensuring robust operation and preventing damage under fault conditions. Its high efficiency (typically exceeding 85%) minimizes power dissipation, making it suitable for portable and space-constrained designs. Common use cases include powering low-voltage digital circuits, embedded systems, and sensor networks directly from higher-voltage sources, providing a regulated and stable 3.3V supply. The absence of external adjustment simplifies design and reduces component count, making it a cost-effective and reliable solution for various power supply applications.