The LD1117AV33 is an electronically controlled Voltage regulator, referred to as an LDO (Low-Drop Out regulator), manufactured by STMicroelectronics. It is characterized by linear, fixed voltage regulation at 3.3V with a maximum current of 1A. The output of this regulator is 3.3V and the output tolerance is ±4%. It is a through-hole, TO220AB package and is available in both surface mount and through-hole packaging. It provides more current than the LD1117V33 which is a smaller package, with 0.5A maximum current. Due to its low output voltage, the LD1117AV33 is suitable for applications requiring a lower supply than other regulator types. Typical applications include battery-powered equipment, digital processors, memory systems, and communications equipment.