LM2576HVT-ADJ/NOPB – TEXAS INSTRUMENTS

The Texas Instruments LM2576HVT-ADJ/NOPB is a 3A adjustable step-down switching regulator in a space-saving SOT-223-5 package. Its key differentiator is the “HVT” designation, indicating a high-voltage input range of 7V to 40V, exceeding the typical LM2576’s maximum. This allows for direct operation from a wide variety of input sources, including automotive systems and industrial power supplies. The “ADJ” suffix signifies adjustable output voltage, programmable via external resistors to achieve a precise output within a range of 1.23V to 37V (limited by input voltage and component selection). The absence of a thermal shutdown feature (unlike some LM2576 variants) necessitates careful thermal management for sustained high-current operation. The /NOPB suffix indicates a lead-free, RoHS-compliant package._x000D_
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Its internal switching frequency of 52kHz minimizes the size of external components, making it ideal for compact designs. Common applications include point-of-load converters in distributed power architectures, battery-powered devices requiring precise voltage regulation from a varying input, and portable instrumentation where a wide input voltage tolerance is crucial. Designers should prioritize efficient heat sinking and consider the absence of over-temperature protection when integrating the LM2576HVT-ADJ/NOPB into their circuits. Its high-voltage input capability and adjustable output make it a versatile choice where flexibility and compact size are paramount.