DESCRIPTION
The LTC®1472 switching matrix routes power to both the VCC and VPP power supply pins of the PCMCIA compatible card socket. The VCC output of the LTC1472 is switched between three operating states: OFF, 3.3V, and 5V. The VPP output is switched between four operating states: 0V, VCC, 12V, and Hi-Z. The output voltages are selected by two sets of digital inputs which are compatible with industry standard PC Card controllers (see Truth Tables).

FEATURES
■ Both VCC and VPP Switching in a Single Package
■ Built-In Current Limit and Thermal Shutdown
■ 16-Pin (Narrow) SOIC Package
■ Inrush Current Limited (Drives 150µF Loads)
■ Continuous 12V Power Not Required
■ Extremely Low RDS(ON) NMOS Switches
■ Guaranteed 1A VCC Current and 120mA VPP Current
■ 1µA Quiescent Current in Standby
■ No External Components Required
■ Compatible with Industry Standard Controllers
■ Break-Before-Make Switching
■ Controlled Rise and Fall Times

APPLICATIONS
■ OpenCable Set Top Box
■ Notebook Computers
■ Palmtop Computers
■ Pen-Based Computers
■ Bar-Code Readers