LM2576HVT-12/NOPB – TEXAS INSTRUMENTS

The LM2576HVT-12/NOPB is a 12V output, fixed-output voltage switching regulator in a TO-220-5 package (with exposed pad). It’s a monolithic, step-down (buck) converter designed for applications requiring a regulated 12V supply from a wider input voltage range. Specifically, it operates with an input voltage ranging from 15V to 40V, providing a stable 12V output with a ±5% tolerance. The device utilizes a constant-frequency current-mode control architecture, offering fast transient response and good line regulation. Its internal switching frequency is approximately 52kHz, minimizing the size of external components._x000D_
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The /NOPB suffix indicates lead-free packaging compliant with RoHS directives. The HVT designation suggests enhanced thermal performance compared to standard LM2576 variants. Typical applications include powering 12V loads from higher voltage sources like automotive batteries or industrial power supplies. Its advantages include high efficiency (up to 92%), low quiescent current (approximately 8mA), and simple implementation requiring minimal external components – only a few capacitors and an inductor. The robust design makes it suitable for applications demanding reliable and efficient voltage conversion in harsh environments. Its fixed output voltage eliminates the need for external adjustments, simplifying design and reducing component count.