Voltage Regulators — Linear & Adjustable Regulator ICs

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Voltage Regulator ICs — Linear, Adjustable & LDO Regulators Voltage regulators are essential power management components that convert an unregulated DC input into a stable, precise output voltage. This collection covers the complete range of linear voltage regulators — from the classic LM317 adjustable regulator (1.25V–37V, 1.5A) to fixed 5V and 12V regulators (L7805, LM7812) and modern low-dropout (LDO) regulators (AMS1117). Also includes power MOSFETs (IRF series) for high-current switching applications. Adjustable Voltage Regulators LM317T (TO-220): 1.25V–37V, 1.5A — the world’s most popular adjustable regulator, set by two resistors LM317 Module: Pre-assembled adjustable regulator with potentiometer — plug-in variable power supply Fixed Voltage Regulators (78xx Series) L7805 / LM7805 (TO-220): Fixed +5V, 1.5A — power Arduino, microcontrollers, and 5V logic from 7V–35V input LM7812 (TO-220): Fixed +12V, 1.5A — power relays, motors, and 12V peripherals LDO Regulators AMS1117-3.3: 3.3V, 1A LDO — power ESP32, STM32, and 3.3V logic from 5V USB supply AMS1117-5.0: 5V, 1A LDO — regulated 5V from 6V–12V input Power MOSFETs (IRF Series) IRF3205: 55V, 110A, 8mΩ — ultra-low Rds(on) for high-efficiency motor drives and battery management IRF540N: 100V, 33A — general-purpose high-current switching IRF740 / IRF840: 400V–500V — offline SMPS primary switch Regulator Selection Guide Need adjustable output? → LM317T (1.25V–37V, 1.5A) Need fixed 5V? → L7805 (high current) or AMS1117-5.0 (LDO, low dropout) Need 3.3V for ESP32/STM32? → AMS1117-3.3 (1A LDO) Need 12V? → LM7812 Need high-current switching? → IRF series MOSFETs All regulators are new, original, and RoHS compliant. Available in TO-220, TO-92, and SOT-223 packages.