PSi Technologies is a focused independent semiconductor assembly and test service provider to the power semiconductor market. Their vision is to be the global leader in power semiconductor manufacturing, most admired for its partnerships, people and performance. They are proud of their long-standing partnerships with most of the world's leading power semiconductor manufacturers, who include Infineon Technologies, Texas Instruments, ON Semiconductor, Philips and ST Microelectronics. Their more than 3,000 employees enable the company to provide cost effective and comprehensive package design, assembly and test services for power semiconductors used in telecommunications and networking systems, computers and computer peripherals, consumer electronics, electronic office equipment, automotive systems and industrial products.

PSi Tehcnologies proudly represents the Philippines as the only Philippine incorporated company that is listed in the US NASDAQ stock exchange under the trading symbols PSIT.

Established in 1978 as a local subsidiary of Motorola in the Philippines and as a result of the 1999 spin-off of the Semiconductor Components (SCG) Division of Motorola, to become an independent company, SCG Philippines, Inc. (ON Semiconductor Philippines or OSPI) became a subsidiary of the ON Semiconductor Corporation. It should be noted that in 1988, Philippine Society for Quality Control named Motorola Outstanding Quality Company of the Year. ON Semiconductor today is the world's number one supplier of analog logic and discrete components and offers an extensive portfolio of power, data and standard semiconductor components that address the design needs of today's sophisticated electronic products, automotive and appliances.

In 1988, ON Semiconductor shipped a total of 15 billion analog/logic and discrete products. Today, ON Semiconductor has a total of 8,400 employees worldwide including 9 manufacturing facilities, 5 technology and design centers across the globe and over 100 manufacturing subcontractors worldwide.