LT1313_15 Datasheet, PDF (1/12 Pages) Linear Technology – Dual PCMCIA VPP Driver/Regulator

LT1313
Dual PCMCIA
VPP Driver/Regulator
FEATURES
s _{Digital Selection of 0V, VCC, 12V or Hi-Z}
s _{Output Current Capability: 120mA}
s _{Internal Current Limiting and Thermal Shutdown}
s _{Automatic Switching from 3.3V to 5V}
s _{Powered from Unregulated 13V to 20V Supply}
s _{Logic Compatible with Standard PCMCIA Controllers}
s _{Output Capacitors: 1µF}
s _{Quiescent Current in Hi-Z or 0V Mode: 60µA}
s _{Independent VPP Valid Status Feedback Signals}
s _{No VPP Overshoot}
U
APPLICATIONS
s _{Notebook Computers}
s _{Palmtop Computers}
s _{Pen-Based Computers}
s _{Handi-Terminals}
s _{Bar-Code Readers}
s _{Flash Memory Programming}
DESCRIPTION
The LT^®1313 is a member of Linear Technology
Corporation’s PCMCIA driver/regulator family. It provides
0V, 3.3V, 5V, 12V and Hi-Z regulated power to the VPP
pins of two PCMCIA card slots from a single unregulated
13V to 20V supply. When used in conjunction with a PC Card
Interface Controller, the LT1313 forms a complete minimum
component-count interface for palmtop, pen-based and note-
book computers. The two VPP output voltages are inde-
pendently selected by four logic compatible digital inputs
which interface directly with industry standard PC Card
Interface Controllers.
Automatic 3.3V to 5V switching is provided by two inde-
pendent comparators which continuously monitor each
PC card V_CC supply voltage and automatically adjust the
VPP output to match the associated V_CC pin voltage when
the VPP = V_CC mode is selected.
Two open-collector VPP VALID outputs are provided to
indicate when the VPP outputs are in regulation at 12V.
The LT1313 is available in 16-pin SO packaging.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
Typical PCMCIA Dual Slot VPP Driver
13V TO 20V
DUAL PCMCIA
CARD SLOT
CONTROLLER
V_S
V_S
AEN0 AVPP_OUT
AEN1
AVALID ASENSE
LT1313
BEN0 BVPP_OUT
BEN1
BVALID BSENSE
GND GND
0.1µF
VPP1
+ _1µF
TANTALUM
VPP2
PCMCIA
CARD SLOT
#1
V_CC
3.3V/5V
VPP1
+ _1µF
TANTALUM
VPP2
PCMCIA
CARD SLOT
#2
V_CC
Linear Technology PCMCIA Product Family
DEVICE DESCRIPTION
PACKAGE
LT1312 SINGLE PCMCIA VPP DRIVER/REGULATOR 8-PIN SO
LT1313 DUAL PCMCIA VPP DRIVER/REGULATOR 16-PIN SO*
LTC^®1314 SINGLE PCMCIA SWITCH MATRIX
14-PIN SO
LTC1315 DUAL PCMCIA SWITCH MATRIX
24-PIN SSOP
LTC1470 PROTECTED V_CC 5V/3.3V SWITCH MATRIX
LTC1472 PROTECTED V_CC AND VPP SWITCH MATRIX
*NARROW BODY
8-PIN SO
16-PIN SO*
3.3V/5V
1313 TA01
1