Alpha Semiconductor (Sipex), a subsidiary of Calogic, Corporation, was a manufacturer of linear regulators and controllers. Alpha Semiconductor was acquired by Sipex Corporation in October, 1999 as part of the Sipex acquisition of Calogic Corp. Sipex Corporation, headquartered in Milpitas, California, is a semiconductor company that designs, manufactures and markets a broad portfolio of high performance, value-added, analog integrated circuits (ICs) for original equipment manufacturers (OEMs) doing business in the high growth markets of networking, computing, communications, and optical storage.

    The types of products manufactured by Alpha Semiconductor (-> Sipex) include Analog integrated circuits (ICs) for the networking, computing, communications, and optical storage markets: Power Management products: Boost, Buck, Charge Pumps, LED Drivers, Low Drop-Out, Power Blox., PWM Controllers, References, Supervisors, and USB Vbus Switches. Interface products: Multiprotocol, RS232, RS422, RS485, and USB. Optical Storage products: Advanced Power Control, Laser Diode Driver, Laser Diode Modulators, and Photo-Detector ICs.