onsemi (formerly ON Semiconductor) is a premier supplier of high-performance, energy-efficient silicon solutions for green electronics, headquartered in Phoenix, Arizona, USA. Founded in 1999 as a spin-off from Motorola's semiconductor division, it has grown into a global innovator. The core business covers power management, signal processing, logic, discrete, and custom semiconductor devices for automotive, industrial, communications, computing, consumer, medical, and military/aerospace applications. Its product portfolio includes power discrete and modules such as MOSFETs, IGBTs, and EliteSiC silicon carbide devices, along with power management ICs like LDOs, DC-DC converters, and controllers. In signal management, it offers operational amplifiers, comparators, voltage references, and data converters. Through the Catalyst Group acquisition, the company provides programmable memory products like EEPROM, Flash, NVRAM, and digital potentiometers. Sensor offerings include CMOS image sensors, LiDAR, ultrasonic, and proximity sensors for ADAS and smart sensing. onsemi operates a worldwide network of manufacturing facilities, design centers, and sales offices across North America, Europe, and Asia-Pacific. In 2009, it reported revenues of $1.769 billion, and as of 2024, it is a Fortune 500 company and a top-20 global semiconductor supplier, with a strong leadership position in automotive and industrial power semiconductors.