The LT 1312 is a member of Linear Technology Corporation's family of PCMCIA drivers/regulators. The LT1312 provides 0V, 3.3V, 5V, 12V and Hi-Z regulated power to the VPP pin of a PCMCIA card slot from a single unregulated 13V to 20V supply. When used in conjunction with a PC card interface controller, the LT1312 forms a complete minimum component-count interface for palmtop, pen-based and notebook computers. The VPP output voltage is selected by two logic compatible digital inputs which interface directly with industry standard PC card interface controllers.