LT1313
Dual PCMCIA
VPP Driver/Regulator
FEATURES
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DESCRIPTION
The LT
廬
1313 is a member of Linear Technology
Corporation鈥檚 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.
Digital Selection of 0V, V
CC
, 12V or Hi-Z
Output Current Capability: 120mA
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
Output Capacitors: 1碌F
Quiescent Current in Hi-Z or 0V Mode: 60碌A(chǔ)
Independent VPP Valid Status Feedback Signals
No VPP Overshoot
APPLICATIONS
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Notebook Computers
Palmtop Computers
Pen-Based Computers
Handi-Terminals
Bar-Code Readers
Flash Memory Programming
TYPICAL APPLICATION
Typical PCMCIA Dual Slot VPP Driver
13V TO 20V
0.1碌F
V
S
AEN0
AEN1
DUAL PCMCIA
CARD SLOT
CONTROLLER
AVALID
ASENSE
3.3V/5V
VPP1
VPP2
PCMCIA
CARD SLOT
#2
V
CC
1313 TA01
Linear Technology PCMCIA Product Family
VPP1
VPP2
PCMCIA
CARD SLOT
#1
V
CC
V
S
AVPP
OUT
+
DEVICE
LT1312
LT1313
廬
DESCRIPTION
SINGLE PCMCIA VPP DRIVER/REGULATOR
DUAL PCMCIA VPP DRIVER/REGULATOR
DUAL PCMCIA SWITCH MATRIX
PROTECTED V
CC
5V/3.3V SWITCH MATRIX
1碌F
TANTALUM
LT1313
BEN0
BEN1
BVALID
GND
BSENSE
GND
BVPP
OUT
LTC 1314 SINGLE PCMCIA SWITCH MATRIX
LTC1315
LTC1470
LTC1472
+
1碌F
TANTALUM
PROTECTED V
CC
AND VPP SWITCH MATRIX 16-PIN SO*
*NARROW BODY
3.3V/5V
U
U
U
PACKAGE
8-PIN SO
16-PIN SO*
14-PIN SO
24-PIN SSOP
8-PIN SO
1