LT1312

Supply Voltage ........................................................ 22V
Digital Input Voltage ........................ 7V to (GND  0.3V)
Sense Input Voltage ......................... 7V to (GND  0.3V)
Valid Output Voltage ...................... 15V to (GND  0.3V)
Output Short-Circuit Duration .......................... Indefinite
Operating Temperature ................................ 0°C to 70°C
Junction Temperature................................ 0°C to 125°C
Storage Temperature Range ................. 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C


Description

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. Automatic 3.3V to 5V switching is provided by an internal comparator which continuously monitors the PC card VCC supply and automatically adjusts the regulated VPP output to match VCC when the VPP = VCC mode is selected. An open-collector VPP VALID output is driven low when VPP is in regulation at 12V. The LT1312 is available in an 8-pin SO package.