LT1313
Dual PCMCIA
VPP Driver/Regulator
FEATURES
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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.
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: 1µF
Quiescent Current in Hi-Z or 0V Mode: 60µA
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
0.1µF
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
LTC1315
LTC1470
LTC1472
DESCRIPTION
SINGLE PCMCIA VPP DRIVER/REGULATOR
DUAL PCMCIA VPP DRIVER/REGULATOR
DUAL PCMCIA SWITCH MATRIX
PROTECTED V
CC
5V/3.3V SWITCH MATRIX
1µF
TANTALUM
LT1313
BEN0
BEN1
BVALID
GND
BSENSE
GND
BVPP
OUT
LTC
®
1314 SINGLE PCMCIA SWITCH MATRIX
+
1µF
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
LT1313
ABSOLUTE
MAXIMUM
RATINGS
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 INFORMATION
TOP VIEW
GND
AEN0
AEN1
AVALID
GND
BEN0
BEN1
BVALID
1
2
3
4
5
6
7
8
16 AVPP
OUT
15 NC
14 V
S
13 ASENSE
12 BVPP
OUT
11 NC
10 V
S
9
BSENSE
ORDER PART
NUMBER
LT1313CS
S PACKAGE
16-LEAD PLASTIC SO
T
JMAX
= 125°C,
θ
JA
= 100°C/ W
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
VPP
OUT
Output Voltage
CONDITIONS
V
S
= 13V to 20V, T
A
= 25
°
C (Note 1), unless otherwise noted.
MIN
q
q
q
q
q
q
q
q
q
q
q
q
TYP
12.00
5.00
3.30
0.42
60
60
260
105
85
126
31
31
330
MAX
12.48
5.25
3.465
0.60
10
100
100
400
150
120
132
33
33
500
0.4
UNITS
V
V
V
V
µA
µA
µA
µA
µA
µA
mA
mA
mA
mA
V
V
µA
µA
V
V
µA
µA
V
mA
µA
Program to 12V, I
OUT
≤
120mA (Note 2)
Program to 5V, I
OUT
≤
30mA (Note 2)
Program to 3.3V, I
OUT
≤
30mA (Note 2)
Program to 0V, I
OUT
= – 300µA
Program to Hi-Z, 0V
≤
VPP
OUT
≤
12V
Both Channels Programmed to 0V
Both Channels Programmed to Hi-Z
One Channel Programmed to 12V, No Load (Note 3)
One Channel Programmed to 5V, No Load (Note 3)
One Channel Programmed to 3.3V, No Load (Note 3)
One Channel Programmed to 12V, I
OUT
= 120mA (Note 3)
One Channel Programmed to 5V, I
OUT
= 30mA (Note 3)
One Channel Programmed to 3.3V, I
OUT
= 30mA (Note 3)
Program to 3.3V, 5V or 12V (Note 3)
11.52
4.75
3.135
– 10
I
LKG
I
S
Output Leakage
Supply Current
I
LIM
V
ENH
V
ENL
I
ENH
I
ENL
V
SEN5
V
SEN3
I
SEN
Current Limit
Enable Input High Voltage
Enable Input Low Voltage
Enable Input High Current
Enable Input Low Current
V
CC
Sense Threshold
V
CC
Sense Threshold
V
CC
Sense Input Current
q
q
2.4
20
0.01
50
1
4.50
4.50
60
30
11.5
10
2.4V
≤
V
IN
≤
5.5V
0V
≤
V
IN
≤
0.4V
VPP
OUT
= 3.3V to 5V (Note 4)
VPP
OUT
= 5V to 3.3V (Note 4)
V
SENSE
= 5V
V
SENSE
= 3.3V
Program to 12V, (Note 5)
Program to 12V, V
VALID
= 0.4V, (Note 5)
Program to 0V, V
VALID
= 12V, (Note 5)
q
q
q
3.60
3.60
4.05
4.00
38
18
V
VALID TH
VPP
VALID
Threshold Voltage
I
VALID
VPP
VALID
Output Drive Current
VPP
VALID
Output Leakage Current
10.5
1
11
3.3
0.1
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.
2
U
W
U
U
W W
W
LT1313
TYPICAL PERFORMANCE CHARACTERISTICS
Quiescent Current
(0V or Hi-Z Mode)
100
T
J
= 25°C
BOTH CHANNELS PROGRAMMED TO 0V
OR BOTH CHANNELS PROGRAMMED TO Hi-Z
500
T
J
= 25°C
ONE CHANNEL PROGRAMMED TO 12V
OTHER CHANNEL IN 0V OR Hi-Z MODE
R
L
=
∞
QUIESCENT CURRENT (µA)
QUIESCENT CURRENT (µA)
QUIESCENT CURRENT (µA)
80
60
40
20
0
0
5
15
20
10
SUPPLY VOLTAGE (V)
Ground Pin Current (12V Mode)
10
T
J
= 25°C
12V MODE
SINGLE OUTPUT
GROUND CURRENT (mA)
2.5
GROUND CURRENT (mA)
8
6
R
L
= 100Ω
I
L
= 120mA*
1.5
R
L
= 167Ω
I
L
= 30mA*
1.0
R
L
= 500Ω
I
L
= 10mA*
*FOR VPP
OUT
= 5V
0
5
15
20
10
SUPPLY VOLTAGE (V)
25
1313 G05
GROUND CURRENT (mA)
4
R
L
= 200Ω
I
L
= 60mA*
R
L
= 400Ω
I
L
= 30mA*
*FOR VPP
OUT
= 12V
0
5
15
20
10
SUPPLY VOLTAGE (V)
25
1313 G04
2
0
Ground Pin Current
16
14
GROUND PIN CURRENT (mA)
SHORT-CIRCUIT CURRENT (mA)
12
10
8
6
4
2
0
0
20
40 60 80 100 120 140 160
OUTPUT CURRENT (mA)
1313 G07
600
500
400
300
200
100
0
0
5
15
INPUT VOLTAGE (V)
10
20
25
1313 G08
SHORT-CIRCUIT CURRENT (mA)
T
J
= 25°C
V
S
= 15V
SINGLE CHANNEL
U W
LT1313 G1
Quiescent Current (12V Mode)
250
Quiescent Current (3.3V/5V Mode)
T
J
= 25°C
ONE CHANNEL PROGRAMMED TO
VPP = V
CC
. OTHER CHANNEL IN
0V OR Hi-Z MODE
R
L
=
∞
400
200
300
150
V
SENSE
= 5V
V
SENSE
= 3.3V
50
200
100
100
25
0
0
0
5
15
20
10
SUPPLY VOLTAGE (V)
25
1313 G02
0
5
15
20
10
SUPPLY VOLTAGE (V)
25
1313 G03
Ground Pin Current (5V Mode)
2.5
T
J
= 25°C
5V MODE
SINGLE OUTPUT
V
SENSE
= 5V
Ground Pin Current (3.3V Mode)
T
J
= 25°C
3.3V MODE
SINGLE OUTPUT
V
SENSE
= 3.3V
2.0
2.0
1.5
R
L
= 110Ω
I
L
= 30mA*
1.0
R
L
= 330Ω
I
L
= 10mA*
*FOR VPP
OUT
= 3.3V
0
5
15
20
10
SUPPLY VOLTAGE (V)
25
1313 G06
0.5
0.5
0
0
Current Limit
800
700
Current Limit
600
V
S
= 15V
XVPP
OUT
= 0V
SINGLE CHANNEL
T
J
= 25°C
XVPP
OUT
= 0V
SINGLE CHANNEL
500
400
300
200
100
0
0
25
50
75
100
JUNCTION TEMPERATURE (°C)
125
1313 G09
3
LT1313
TYPICAL PERFORMANCE CHARACTERISTICS
Enable Input Threshold Voltage
3.0
V
S
= 15V
INPUT THRESHOLD VOLTAGE (V)
ENABLE INPUT CURRENT (µA)
50
V
CC
SENSE THRESHOLD VOLTAGES (V)
2.5
2.0
1.5
1.0
0.5
0
0
25
50
75
100
JUNCTION TEMPERATURE (°C)
V
CC
Sense Input Current
50
1.0
V
CC
SENSE INPUT CURRENT (µA)
RIPPLE REJECTION RATIO (dB)
T
J
= 25°C
V
S
= 15V
VALID OUTPUT VOLTAGE (V)
40
30
20
10
0
0
5
2
3
4
1
V
CC
SENSE INPUT VOLTAGE (V)
6
1313 G13
12V Turn-On Waveform
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE
CHANGE (mV)
12.2
12.0
11.8
11.6
V
S
= 15V
20
0
–20
–40
C
OUT
= 1µF
OUTPUT VOLTAGE
CHANGE (V)
12.4
C
OUT
= 1µF
C
OUT
= 10µF
5
0
–0.2
0
0.2
0.4 0.6
TIME (ms)
0.8
1.0
1.2
15
13
–0.1
0
0.1
0.2 0.3
TIME (ms)
0.4
0.5
0.6
LOAD
CURRENT (mA)
EN0 INPUT (V)
SUPPLY
VOLTAGE (V)
4
U W
1313 G10
1313 G16
Enable Input Current
5.5
T
J
= 25°C
V
S
= 15V
40
V
CC
Sense Threshold Voltage
T
J
= 25°C
V
S
= 15V
5.0
4.5
SWITCH TO 5V
4.0
3.5
3.0
2.5
SWITCH TO 3.3V
30
20
10
0
125
0
1
2
3
4
5
ENABLE INPUT VOLTAGE (V)
6
1313 G11
0
25
50
75
100
JUNCTION TEMPERATURE (°C)
125
1313 G12
VALID Output Voltage
100
T
J
= 25°C
V
S
= 15V
12V MODE
Ripple Rejection (12V)
T
J
= 25°C, 12V MODE
V
S
= 15V
+
100mV
RMS
RIPPLE
80
0.8
0.6
60
C
OUT
= 1µF TANTALUM
0.4
40
0.2
20
0
0
2.5
1.0
1.5
2.0
0.5
VALID OUTPUT CURRENT (mA)
3.0
1313 G14
0
10
100
1k
10k
FREQUENCY (Hz)
100k
1M
1313 G15
Line Transient Response (12V)
40
0.4
0.2
0
–0.2
–0.4
Load Transient Response (12V)
C
OUT
= 1µF
C
OUT
= 10µF
C
OUT
= 10µF
100
50
–0.1
0
0.1
0.2 0.3
TIME (ms)
0.4
0.5
0.6
1313 G17
1313 G18
LT1313
PIN FUNCTIONS
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 0.1µF
to 1µF 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 1µF to 10µF tantalum output
capacitor is recommended.
Input Enable Pins:
The four digital input pins are high
impedance inputs with approximately 20µA 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 30µA. 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 DIAGRAM
V
S
XV
CC
SENSE
+
–
4V
XVALID
XEN0
XEN1
X = A OR B
W
U
U
U
(One Channel)
LOW DROPOUT
LINEAR
REGULATOR
XVPP
OUT
+
VOLTAGE
LOGIC CONTROL
–
11V
1313 BD
5
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