MITSUMI possesses both bipolar and CMOS processes, leveraging their characteristics to develop products. Its extensive portfolio includes power supply ICs such as lithium-ion battery ICs, reset ICs, and LDOs, sensor ICs like MEMS-based sensors and IR sensors for contactless temperature measurement, and power semiconductors. We also offer foundry services. We manufacture these developed products using our own front-end and back-end processes, as well as external FABs, to deliver optimal solutions to customers.

The origin of our products lies in the development of CMOS ICs for quartz watches. We miniaturized quartz mechanisms from the size of a locker to something small enough to be worn on a wrist, and succeeded in bringing to production analog semiconductors that function accurately while using only a minute amount of energy. The safe and reliable leading-edge technology cultivated through our research and manufacturing is seeing increasing utilization in the latest key devices, including those for automobiles, smartphones, and healthcare.

Connecting people and society with power semiconductors.
Our products support the electrification of industrial and social infrastructure. Our engineering technology and packaging technology enable both compact size and high performance, delivering high reliability backed by decades of market experience and advanced technology.
These products are adopted globally by industry-leading customers for applications such as railway, automotive and home appliances.