LT1312 Datasheet | Linear Technology

LT1312 Single PCMCIA VPP Driver/Regulator Features s s s s s s s s s s s 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 plete minimum ponent-count interface for palmtop, pen-based and notebook puters. The VPP output voltage is selected by two logic patible digital inputs which interface directly with industry standard PC card interface controllers. Automatic 3.3V to 5V switching is provided by an internal parator 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. , LTC and LT are registered trademarks of Linear Technology Corporation. Digital Selection of 0V, VCC, 12V or Hi-Z 120m A Output Current Capability Internal Current Limiting and Thermal Shutdown Automatic Switching from 3.3V to 5V Powered from Unregulated 13V to 20V Supply Logic patible with Standard PCMCIA Controllers 1µF Output Capacitor 30µA Quiescent Current in Hi-Z or 0V Mode VPP Valid Status Feedback Signal No VPP Overshoot 8-Pin SO Packaging U APPLICATIONS s s s s s s Notebook puters Palmtop puters Pen-Based puters Handi-Terminals Bar-Code Readers Flash Memory Programming TYPICAL APPLICATION Typical PCMCIA Single Slot VPP Driver 13V TO 20V VS PCMCIA CARD SLOT CONTROLLER EN0 VPPOUT VPP1 VPP2 PCMCIA CARD SLOT VCC 3.3V OR 5V Linear Technology PCMCIA Product Family DEVICE LT1312 LT1313 LT1312 TA1 DESCRIPTION SINGLE PCMCIA VPP DRIVER/REGULATOR DUAL PCMCIA VPP DRIVER/REGULATOR DUAL PCMCIA SWITCH MATRIX PROTECTED VCC 5V/3.3V SWITCH MATRIX EN1 LT1312 VALID...