1
LT1313
Dual PCMCIA
VPP Driver/Regulator
s
Digital Selection of 0V, V
CC
, 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: 1
F
s
Quiescent Current in Hi-Z or 0V Mode: 60
A
s
Independent VPP Valid Status Feedback Signals
s
No VPP Overshoot
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.
FEATURES
DESCRIPTIO
N
U
s
Notebook Computers
s
Palmtop Computers
s
Pen-Based Computers
s
Handi-Terminals
s
Bar-Code Readers
s
Flash Memory Programming
APPLICATIO
N
S
U
TYPICAL APPLICATIO
N
U
VPP1
VPP2
PCMCIA
CARD SLOT
#1
V
CC
VPP1
VPP2
PCMCIA
CARD SLOT
#2
V
CC
ASENSE
AVPP
OUT
GND
GND
LT1313
V
S
V
S
AVALID
AEN0
AEN1
BSENSE
BVPP
OUT
BVALID
BEN0
BEN1
13V TO 20V
+
1
F
TANTALUM
1
F
TANTALUM
DUAL PCMCIA
CARD SLOT
CONTROLLER
+
0.1
F
3.3V/5V
3.3V/5V
1313 TA01
Typical PCMCIA Dual Slot VPP Driver
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
8-PIN SO
LTC1472
PROTECTED V
CC
AND VPP SWITCH MATRIX
16-PIN SO*
*NARROW BODY
Linear Technology PCMCIA Product Family
, LTC and LT are registered trademarks of Linear Technology Corporation.
2
LT1313
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VPP
OUT
Output Voltage
Program to 12V, I
OUT
120mA (Note 2)
q
11.52
12.00
12.48
V
Program to 5V, I
OUT
30mA (Note 2)
q
4.75
5.00
5.25
V
Program to 3.3V, I
OUT
30mA (Note 2)
q
3.135
3.30
3.465
V
Program to 0V, I
OUT
= 300
A
0.42
0.60
V
I
LKG
Output Leakage
Program to Hi-Z, 0V
VPP
OUT
12V
q
10
10
A
I
S
Supply Current
Both Channels Programmed to 0V
q
60
100
A
Both Channels Programmed to Hi-Z
q
60
100
A
One Channel Programmed to 12V, No Load (Note 3)
q
260
400
A
One Channel Programmed to 5V, No Load (Note 3)
q
105
150
A
One Channel Programmed to 3.3V, No Load (Note 3)
q
85
120
A
One Channel Programmed to 12V, I
OUT
= 120mA (Note 3)
q
126
132
mA
One Channel Programmed to 5V, I
OUT
= 30mA (Note 3)
q
31
33
mA
One Channel Programmed to 3.3V, I
OUT
= 30mA (Note 3)
q
31
33
mA
I
LIM
Current Limit
Program to 3.3V, 5V or 12V (Note 3)
330
500
mA
V
ENH
Enable Input High Voltage
q
2.4
V
V
ENL
Enable Input Low Voltage
q
0.4
V
I
ENH
Enable Input High Current
2.4V
V
IN
5.5V
20
50
A
I
ENL
Enable Input Low Current
0V
V
IN
0.4V
0.01
1
A
V
SEN5
V
CC
Sense Threshold
VPP
OUT
= 3.3V to 5V (Note 4)
q
3.60
4.05
4.50
V
V
SEN3
V
CC
Sense Threshold
VPP
OUT
= 5V to 3.3V (Note 4)
q
3.60
4.00
4.50
V
I
SEN
V
CC
Sense Input Current
V
SENSE
= 5V
38
60
A
V
SENSE
= 3.3V
18
30
A
V
VALID TH
VPP
VALID
Threshold Voltage
Program to 12V, (Note 5)
q
10.5
11
11.5
V
I
VALID
VPP
VALID
Output Drive Current
Program to 12V, V
VALID
= 0.4V, (Note 5)
1
3.3
mA
VPP
VALID
Output Leakage Current
Program to 0V, V
VALID
= 12V, (Note 5)
0.1
10
A
ABSOLUTE
M
AXI
M
U
M
RATINGS
W
W
W
U
Supply Voltage ........................................................ 22V
Digital Input Voltage ........................ 7V to (GND 0.3V)
Sense Input Voltage ......................... 7V to (GND 0.3V)
VALID Output Voltage .................... 15V to (GND 0.3V)
Output Short-Circuit Duration .......................... Indefinite
Operating Temperature ................................ 0
C to 70
C
Junction Temperature ................................ 0
C to 125
C
Storage Temperature Range ..................65
C to 150
C
Lead Temperature (Soldering, 10 sec).................. 300
C
PACKAGE/ORDER I
N
FOR
M
ATIO
N
W
U
U
ELECTRICAL CHARACTERISTICS
V
S
= 13V to 20V, T
A
= 25
C (Note 1), unless otherwise noted.
The
q
denotes the specifications which apply over the full operating
temperature range.
Note 1: Both V
S
pins (10, 14) must be connected together, and both
ground pins (1, 5) must be connected together.
Note 2: For junction temperatures greater than 110
C, a minimum
load of 1mA is recommended.
Note 3: The other channel is programmed to the 0V mode (XEN0 =
XEN1 = 0V) during this test.
Note 4: The V
CC
sense threshold voltage tests are performed
independently.
Note 5: The VPP
VALID
tests are performed independently.
T
JMAX
= 125
C,
JA
= 100
C/ W
LT1313CS
ORDER PART
NUMBER
Consult factory for Industrial and Military grade parts.
1
2
3
4
5
6
7
8
TOP VIEW
S PACKAGE
16-LEAD PLASTIC SO
16
15
14
13
12
11
10
9
GND
AEN0
AEN1
AVALID
GND
BEN0
BEN1
BVALID
AVPP
OUT
NC
V
S
ASENSE
BVPP
OUT
NC
V
S
BSENSE
3
LT1313
TYPICAL PERFOR
M
A
N
CE CHARACTERISTICS
U
W
Quiescent Current
(0V or Hi-Z Mode)
SUPPLY VOLTAGE (V)
0
QUIESCENT CURRENT (
A)
60
80
100
20
LT1313 G1
40
20
0
5
10
15
25
T
J
= 25C
BOTH CHANNELS PROGRAMMED TO 0V
OR BOTH CHANNELS PROGRAMMED TO Hi-Z
SUPPLY VOLTAGE (V)
0
QUIESCENT CURRENT (
A)
150
200
250
20
1313 G03
100
50
0
5
10
15
25
T
J
= 25C
ONE CHANNEL PROGRAMMED TO
VPP = V
CC
. OTHER CHANNEL IN
0V OR Hi-Z MODE
R
L
=
V
SENSE
= 5V
V
SENSE
= 3.3V
Ground Pin Current (5V Mode)
Ground Pin Current (12V Mode)
Ground Pin Current
Current Limit
INPUT VOLTAGE (V)
0
SHORT-CIRCUIT CURRENT (mA)
300
400
500
15
25
1313 G08
200
100
0
5
10
20
600
700
800
T
J
= 25C
XVPP
OUT
= 0V
SINGLE CHANNEL
Current Limit
JUNCTION TEMPERATURE (C)
0
SHORT-CIRCUIT CURRENT (mA)
600
500
400
300
200
100
0
25
50
75
100
1313 G09
125
V
S
= 15V
XVPP
OUT
= 0V
SINGLE CHANNEL
SUPPLY VOLTAGE (V)
0
GROUND CURRENT (mA)
2.5
2.0
1.5
1.0
0.5
0
20
1313 G06
5
10
15
25
T
J
= 25C
3.3V MODE
SINGLE OUTPUT
V
SENSE
= 3.3V
R
L
= 110
I
L
= 30mA*
*FOR VPP
OUT
= 3.3V
R
L
= 330
I
L
= 10mA*
SUPPLY VOLTAGE (V)
0
GROUND CURRENT (mA)
2.5
2.0
1.5
1.0
0.5
0
20
1313 G05
5
10
15
25
T
J
= 25C
5V MODE
SINGLE OUTPUT
V
SENSE
= 5V
R
L
= 167
I
L
= 30mA*
*FOR VPP
OUT
= 5V
R
L
= 500
I
L
= 10mA*
Ground Pin Current (3.3V Mode)
Quiescent Current (3.3V/ 5V Mode)
Quiescent Current (12V Mode)
SUPPLY VOLTAGE (V)
0
QUIESCENT CURRENT (
A)
300
400
500
20
1313 G02
200
100
0
5
10
15
25
T
J
= 25C
ONE CHANNEL PROGRAMMED TO 12V
OTHER CHANNEL IN 0V OR Hi-Z MODE
R
L
=
SUPPLY VOLTAGE (V)
0
GROUND CURRENT (mA)
10
8
6
4
2
0
20
1313 G04
5
10
15
25
T
J
= 25
C
12V MODE
SINGLE OUTPUT
R
L
= 200
I
L
= 60mA*
*FOR VPP
OUT
= 12V
R
L
= 400
I
L
= 30mA*
R
L
= 100
I
L
= 120mA*
OUTPUT CURRENT (mA)
0
GROUND PIN CURRENT (mA)
160
1313 G07
40
80
120
16
14
12
10
8
6
4
2
0
20
60
100
140
T
J
= 25C
V
S
= 15V
SINGLE CHANNEL
4
LT1313
TYPICAL PERFOR
M
A
N
CE CHARACTERISTICS
U
W
JUNCTION TEMPERATURE (C)
0
V
CC
SENSE THRESHOLD VOLTAGES (V)
5.5
5.0
4.5
4.0
3.5
3.0
2.5
25
50
75
100
1313 G12
125
T
J
= 25C
V
S
= 15V
SWITCH TO 5V
SWITCH TO 3.3V
V
CC
Sense Threshold Voltage
FREQUENCY (Hz)
10
RIPPLE REJECTION RATIO (dB)
100
1k
10k
100k
1M
1313 G15
100
80
60
40
20
0
T
J
= 25C, 12V MODE
V
S
= 15V
+
100mV
RMS
RIPPLE
C
OUT
= 1
F TANTALUM
Ripple Rejection (12V)
TIME (ms)
0.2
0
0.2
0.4
0.6
0.8
1.0
1.2
OUTPUT VOLTAGE (V)
EN0 INPUT (V)
12.4
12.2
12.0
11.8
11.6
5
0
1313 G16
C
OUT
= 1
F
C
OUT
= 10
F
V
S
= 15V
12V Turn-On Waveform
TIME (ms)
0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
OUTPUT VOLTAGE
CHANGE (mV)
SUPPLY
VOLTAGE (V)
40
20
0
20
40
15
13
1313 G17
C
OUT
= 1F
C
OUT
= 10F
Line Transient Response (12V)
TIME (ms)
0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
OUTPUT VOLTAGE
CHANGE (V)
LOAD
CURRENT (mA)
0.4
0.2
0
0.2
0.4
100
50
1313 G18
C
OUT
= 1
F
C
OUT
= 10
F
Load Transient Response (12V)
VALID OUTPUT CURRENT (mA)
0
VALID OUTPUT VOLTAGE (V)
1.0
0.8
0.6
0.4
0.2
0
0.5
1.0
1.5
2.0
1313 G14
2.5
3.0
T
J
= 25C
V
S
= 15V
12V MODE
VALID Output Voltage
Enable Input Current
ENABLE INPUT VOLTAGE (V)
0
ENABLE INPUT CURRENT (
A)
50
40
30
20
10
0
1
2
3
4
1313 G11
5
6
T
J
= 25C
V
S
= 15V
Enable Input Threshold Voltage
JUNCTION TEMPERATURE (C)
0
INPUT THRESHOLD VOLTAGE (V)
3.0
2.5
2.0
1.5
1.0
0.5
0
25
50
75
100
1313 G10
125
V
S
= 15V
V
CC
Sense Input Current
V
CC
SENSE INPUT VOLTAGE (V)
0
V
CC
SENSE INPUT CURRENT (A)
50
40
30
20
10
0
1
2
3
4
1313 G13
5
6
T
J
= 25C
V
S
= 15V
5
LT1313
PI
N
FU
N
CTIO
N
S
U
U
U
Supply Pins: Power is supplied to the device through the
two supply pins
which must be connected together at all
times . The supply pins should be bypassed to ground if
the device is more than six inches away from the main
supply capacitor. A bypass capacitor in the range of 0.1
F
to 1
F is sufficient. The supply voltage to the LT1313 can
be loosely regulated between 13V and 20V.
VPP
OUT
Pins: Each regulated output supplies power to the
two PCMCIA card VPP pins which are typically tied to-
gether at the socket. Each VPP
OUT
output is current limited
to approximately 330mA. Thermal shutdown provides a
second level of protection. A 1
F to 10
F tantalum output
capacitor is recommended.
Input Enable Pins: The four digital input pins are high
impedance inputs with approximately 20
A input current
at 2.4V. The input thresholds are compatible with CMOS
controllers and can be driven from either 5V or 3.3V CMOS
logic. ESD protection diodes limit input excursions to 0.6V
below ground.
VALID Output Pins: These pins are open-collector NPN
outputs which are driven low when the corresponding
VPP
OUT
pin is in regulation, i.e., when it is above 11V. Two
external 51k pull-up resistors are connected between
these outputs and the same 5V or 3.3V logic supply
powering the PCMCIA compatible control logic.
V
CC
Sense Pins: Two independent comparators and 4V
references automatically switch the VPP
OUT
outputs from
5V to 3.3V depending upon the voltage sensed at the
corresponding PCMCIA card socket V
CC
pin. The input
current for these pins is approximately 30
A. For 5V only
operation, connect the Sense pins directly to ground. An
ESD protection diode limits the input voltage to 0.6V below
ground.
Ground Pins:
The two ground pins must be connected
together at all times.
BLOCK DIAGRA
M
W
(One Channel)
+
+
XVPP
OUT
XV
CC
SENSE
V
S
XEN0
XEN1
XVALID
1313 BD
11V
LOW DROPOUT
LINEAR
REGULATOR
VOLTAGE
LOGIC CONTROL
4V
X = A OR B
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