The ME8321AS7G is a surface mount, single-output AC-DC controller and regulator manufactured by Micro One. It has a standard SOP-7 (Small-Outline Package) and complies with Restriction of Hazardous Substances (RoHS) directives. The device has an on-chip power MOSFET, optimized for universal input voltage ac/dc power supplies in off-line applications. It also has improved transient regulation performance and is an ideal choice for standby power supply designs. The device has a fixed switching frequency of 100 kHz and a wide input voltage range. It provides current foldback protection, short circuit protection, and an internal thermal shutdown circuit for additional protection. It also offers over-voltage and over-current protection.