LM317MQDCYR – TEXAS INSTRUMENTS

The LM317MQDCYR is a 3-terminal adjustable positive voltage regulator in a TO-220 surface-mount package. Specifically, the “MQ” denotes a thermally enhanced version, improving power dissipation capabilities compared to standard LM317 variants. The “DCYR” suffix indicates a specific manufacturing lot and quality grade, potentially influencing parameters like temperature drift or noise performance – consult the relevant datasheet for precise details. This device offers a wide adjustable output voltage range from 1.2V to 37V, with a maximum output current of 1.5A (subject to adequate heatsinking). Its key advantage lies in its ease of use; a simple resistor divider network sets the output voltage, eliminating the need for complex feedback circuits. Typical applications include precision voltage sources, current limiting circuits, and linear power supplies requiring adjustable output voltages. The LM317MQDCYR’s inherent thermal robustness makes it suitable for applications demanding higher power dissipation within a compact surface-mount design, exceeding the capabilities of smaller packages like SOIC. However, designers should carefully consider thermal management, especially at currents approaching the maximum, to prevent overheating and component failure. Precise specifications for this specific part number should be cross-referenced with the provided datasheet from the manufacturer for guaranteed performance.