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.

FEATURES
■ Digital Selection of 0V, VCC, 12V or Hi-Z
■ 120mA Output Current Capability
■ Internal Current Limiting and Thermal Shutdown
■ Automatic Switching from 3.3V to 5V
■ Powered from Unregulated 13V to 20V Supply
■ Logic Compatible 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

APPLICATIONS
■ Notebook Computers
■ Palmtop Computers
■ Pen-Based Computers
■ Handi-Terminals
■ Bar-Code Readers
■ Flash Memory Programming