Active-Semi, Inc, which means innovation, was founded in 2004 in Silicon Valley, California. ActivePMUTM and ActivePSRTM which are the Active-Semi logo are trademarks of Active-Semi International, Inc., Scotia Centre, P.O. Box 268GT, Grand Cayman, Cayman Islands. It specializes in digital and programmable Power Management Unit (PMU) ICs which revolutionize today's power design and management in portable equipment such as smartphones, portable navigation devices, and personal media players.

It has an international team of industry experts and provides a differentiating innovative product portfolio. Products of Active-Semi enhance mobile equipment performance in a high degree, which exceeds the demands of today's advanced power applications and is depended on its R&D team pioneers' advanced design methodology in delivering innovative portable power solutions. Active-Semi provides a wide range of products which has the best performance. All these Active PMUs are good at supplying power in applications where maximum battery life and smallest size are paramount, especially systems using today's most advanced mobile processors. While, ActivePSRTM family of digital Primary-Side Regulation (PSR) controllers are well-known for low component-count, and exceed all green power efficiency standards. 

Active-Semi is a multinational company in the Cayman Islands. Supported by venture capital firms including USVP, Tenaya Capital and LDV Partners, it has more than 170 patents granted and pending approval.

Active-Semi has built up advanced research and development centers, ISO9001:2000 certified operation, and sales presence in the United States, Europe, Korea, People's Republic of China, Hong Kong, and Taiwan. Active-Semi sincerely hopes the chance to cooperate with Jotrin's customers!

Active-Semi is product portfolio consists of mixed signal SoCs (systems-on-chips) , microcontrollers, DC/DC, AC/DC, PMU and LED drivers .