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1
LTC1472
Protected PCMCIA V
CC
and
VPP Switching Matrix
The LTC
1472 switching matrix routes power to both the
V
CC
and VPP power supply pins of the PCMCIA compatible
card socket. The V
CC
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,
V
CC
, 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).
The V
CC
output of the LTC1472 can supply up to 1A of
current and the VPP output up to 120mA. Both switches
have built-in SafeSlot
TM
current limiting and thermal shut-
down to protect the card, socket and power supply against
accidental short-circuit conditions.
The LTC1472 is designed to conserve power by automati-
cally dropping to 1
A standby current when the two
outputs are switched OFF. A shutdown pin is provided
which holds the external 12V regulator in standby mode
except when required for VPP power.
The LTC1472 is available in 16-pin SO.
DESCRIPTIO
N
U
FEATURES
s
Both V
CC
and VPP Switching in a Single Package
s
Built-In Current Limit and Thermal Shutdown
s
16-Pin (Narrow) SOIC Package
s
Inrush Current Limited (Drives 150
F Loads)
s
Continuous 12V Power Not Required
s
Extremely Low R
DS(ON)
NMOS Switches
s
Guaranteed 1A V
CC
Current and 120mA VPP Current
s
1
A Quiescent Current in Standby
s
No External Components Required
s
Compatible with Industry Standard Controllers
s
Break-Before-Make Switching
s
Controlled Rise and Fall Times
APPLICATIO
N
S
U
s
Notebook Computers
s
Palmtop Computers
s
Pen-Based Computers
s
Handi-Terminals
s
Bar-Code Readers
TYPICAL APPLICATIO
N
U
3V
IN
VPP
IN
5V
IN
V
DD
VPP EN0
VPP EN1
V
CC
EN0
V
CC
EN1
SHDN
VPP
OUT
V
CC(IN)
V
CC(OUT)
LTC1472
GND
12V
3.3V
5V
OV, V
CC
, 12V, Hi-Z
VPP1
VPP2
V
CC
V
CC
PCMCIA
CARD SLOT
CONTROLLER
PCMCIA
CARD SLOT
OFF, 3.3V, 5V
LTC1472-TA01
1
F
0.1
F
0.1
F
10k
0.1
F
0.1
F
TO 12V REGULATOR
+
DEVICE
DESCRIPTION
PACKAGE
LT
1312
Single PCMCIA VPP Driver/Regulator
8-Pin SO
LT1313
Dual PCMCIA VPP Driver/Regulator
16-Pin SO*
LTC1314
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
LTC1471
Dual Protected V
CC
5V/3.3V Switch Matrix
16-Pin SO*
LTC1472
Protected V
CC
and VPP Switch Matrix
16-Pin SO*
*Narrow Body
Protected PCMCIA V
CC
and VPP Card Driver
Linear Technology PCMCIA Product Family
, LTC and LT are registered trademarks of Linear Technology Corporation.
SafeSlot is a trademark of Linear Technology Corporation.
2
LTC1472
ABSOLUTE
M
AXI
M
U
M
RATINGS
W
W
W
U
5V
IN
Supply Voltage ................................... 0.3V to 7V
3V
IN
Supply Voltage ................................... 0.3V to 7V
VPP
IN
Supply Voltage ............................ 0.3V to 13.2V
V
CC(IN)
Supply Voltage ................................... 0.3 to 7V
V
DD(IN)
Supply Voltage ............................... 0.3V to 7V
VPP
OUT
(OFF) ........................................ 0.3V to 13.2V
V
CC(OUT)
(OFF) ............................................ 0.3V to 7V
Enable Inputs .............................................. 0.3V to 7V
VPP
OUT
Short-Circuit Duration ........................ Indefinite
V
CC(OUT)
Short-Circuit Duration ....................... Indefinite
Operating Temperature Range ..................... 0
C to 70
C
Junction Temperature ........................................... 100
C
Storage Temperature Range ................. 65
C to 150
C
Lead Temperature (Soldering, 10 sec).................. 300
C
ORDER PART
NUMBER
LTC1472CS
Consult factory for Industrial and Military grade parts.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
5V
IN
5V
IN
Supply Voltage Range
(Note 2)
4.75
5.25
V
3V
IN
3V
IN
Supply Voltage Range
(Note 3)
0
3.60
V
I
5VIN
5V
IN
Supply Current
Program to Hi-Z
q
0.01
10
A
Program to 5V, No Load
q
140
200
A
Program to 3.3V, No Load
q
100
160
A
I
3VIN
3V
IN
Supply Current
Program to Hi-Z.
q
0.01
10
A
Program to 5V, No Load
q
0.01
10
A
Program to 3.3V, No Load
q
40
80
A
R
ON
5V Switch On Resistance
Program to 5V, I
OUT
= 500mA
0.14
0.18
3.3V Switch On Resistance
Program to 3.3V, I
OUT
= 500mA
0.12
0.16
I
LKG
Output Leakage Current OFF
V
CC
EN0 = V
CC
EN1 = 0V or 5V, 0V
V
CC(OUT)
5V
q
10
A
I
LIM5V
V
CC(OUT)
5V Current Limit
Program to 5V, V
CC(OUT)
= 0V (Note 4)
1
A
I
LIM3V
V
CC(OUT)
3.3V Current Limit
Program to 3.3V, V
CC(OUT)
= 0V (Note 4)
1
A
V
CCENH
V
CC
Enable Input High Voltage
q
2
V
V
CCENL
V
CC
Enable Input Low Voltage
q
0.8
V
I
VCCEN
V
CC
Enable Input Current
0V
V
CCEN
5V
q
1
A
t
VCC1
Delay + Rise Time
From 0V to 3.3V, R
LOAD
= 100
, C
LOAD
= 1
F (Note 5)
0.2
0.32
1
ms
t
VCC2
Delay + Rise Time
From 3.3V to 5V, R
LOAD
= 100
, C
LOAD
= 1
F (Note 5)
0.2
0.52
1
ms
t
VCC3
Delay + Rise Time
From 0V to 5V, R
LOAD
= 100
, C
LOAD
= 1
F (Note 5)
0.2
0.38
1
ms
(V
CC
Switch Section)
5V
IN
= 5V, 3V
IN
= 3.3V, VPP EN0 = VPP EN1 = OV, T
A
= 25
C, (Note 1) unless otherwise noted.
ELECTRICAL CHARACTERISTICS
TOP VIEW
S PACKAGE
16-LEAD PLASTIC SO
T
JMAX
= 100
C,
JA
= 100
C/W
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC(OUT)
5V
IN
V
CC
EN1
V
CC
EN0
VPP
IN
SHDN
VPP EN0
VPP EN1
V
CC(OUT)
3V
IN
3V
IN
GND
V
CC(IN)
VPP
OUT
GND
V
DD
PACKAGE/ORDER I
N
FOR
M
ATIO
N
W
U
U
3
LTC1472
V
DD
= 5V, V
CC(IN)
= 5V, VPP
IN
= 12V, V
CCEN0
= V
CCEN1
= 0V, T
A
= 25
C, (Note 1), unless otherwise noted.
The
q
denotes the specifications which apply over the full operating
temperature range.
Note 1: V
ENH
= 5V, V
ENL
= 0V. See V
CC
and VPP Switch Truth Tables for
programming enable inputs for desired output states.
Note 2: Power for the V
CC
input logic and charge pump circuitry is derived
from the 5V
IN
power supply which must be continuously powered. 12V
and 3.3V power is not required to control the NMOS V
CC
switches. (See
Applications Information.)
Note 3: The two 3V
IN
supply input pins (14 and 15) must be connected
together and the two V
CC(OUT)
output pins (1 and 16) must be connected
together. The 3V
IN
supply pins do not need to be continuously powered
and may drop to 0V when not required.
Note 4: The V
CC
and VPP output are protected with foldback current limit
which reduces the short-circuit (0V) currents below peak permissible
current levels at higher output voltages.
Note 5: To 90% of final value.
Note 6: 12V power is only required when VPP
OUT
is programmed to 12V.
The external 12V regulator can be shutdown at all other times. Built-in
charge pumps power the internal NMOS switches from the 5V V
DD
supply
when 12V is not present.
Note 7: Power for the VPP input logic and charge pump circuitry is derived
from the V
DD
power supply which must be continuously powered.
Note 8: To 90% of the final value, C
OUT
= 0.1
F, R
OUT
= 2.9k.
Note 9: To 10% of the final value, C
OUT
= 0.1
F, R
OUT
= 2.9k.
Note 10: To 50% of the initial value, C
OUT
= 0.1
F, R
OUT
= 2.9k.
ELECTRICAL CHARACTERISTICS
(VPP Switch Section)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
CC(IN)
V
CC
Input Voltage Range
q
3
5.5
V
VPP
IN
VPP Input Voltage Range
(Note 6)
q
0
12.6
V
V
DD
Logic Supply Voltage Range
(Note 7)
q
4.5
5.5
V
I
CCIN
V
CC(IN)
Supply Current, No Load
Program to VPP
IN
or V
CC(IN)
VPP
IN
= 12V
q
35
60
A
Program to 0V or Hi-Z
q
0.01
10
A
I
PPIN
VPP
IN
Supply Current, No Load
Program to VPP
IN
or V
CC(IN)
q
40
80
A
Program to 0V or Hi-Z
q
0.01
10
A
I
DD
V
DD
Supply Current, No Load
Program to VPP
IN
q
70
120
A
Program to V
CC(IN)
, VPP
IN
= 0V
q
85
150
A
Program to V
CC(IN)
, VPP
IN
= 12V
q
40
80
A
Program to 0V or Hi-Z
q
0.01
10
A
I
VPPOUT
Hi-Z Output Leakage Current
Program to Hi-Z, 0V < VPP
OUT
< 12V
q
0.01
10
A
R
ON
On Resistance VPP
OUT
to VPP
IN
VPP
IN
= 12V, I
LOAD
= 120mA
0.50
1
On Resistance VPP
OUT
to V
CC(IN)
V
CC(IN)
= 5V, I
LOAD
= 5mA
1.70
5
On Resistance VPP
OUT
to GND
V
DD
= 5V, I
SINK
= 1mA
100
250
VPP
ENH
VPP Enable Input High Voltage
V
DD
= 5V
q
2
V
VPP
ENL
VPP Enable Input Low Voltage
V
DD
= 5V
q
0.8
V
I
VPPEN
VPP Enable Input Current
0V < VPP EN < VDD
q
1
A
V
SDH
SHDN Output High Voltage
Program to 0V, V
CC(IN)
or Hi-Z, I
LOAD
= 400
A
q
3.5
V
V
SDL
SHDN Output Low Voltage
Program to VPP
IN
, I
SINK
= 400
A
q
0.4
V
I
LIMVCC
VPP
OUT
Current Limit, V
CC(IN)
Program to V
CC(IN)
, VPP
OUT
= 0V (Note 4)
60
mA
I
LIMVPP
VPP
OUT
Current Limit, VPP
IN
Program to VPP
IN
, VPP
OUT
= 0V (Note 4)
100
mA
t
VPP1
Delay and Rise Time
From 0V to V
CC(IN)
,VPP
IN
= 0V (Note 8)
5
15
50
s
t
VPP2
Delay and Rise Time
From 0V to VPP
IN
(Note 8)
25
85
250
s
t
VPP3
Delay and Rise Time
From V
CC(IN)
to VPP
IN
(Note 8)
30
100
300
s
t
VPP4
Delay and Fall Time
From VPP
IN
to V
CC(IN)
(Note 9)
5
15
50
s
t
VPP5
Delay and Fall Time
From VPP
IN
to 0V (Note 10)
10
35
100
s
t
VPP6
Delay and Fall Time
From V
CC(IN)
to 0V, VPP
IN
= 0V (Note 10)
10
30
100
s
t
VPP7
Output Turn-On Delay
From Hi-Z to V
CC(IN)
(Note 8)
5
15
50
s
t
VPP8
Output Turn-On Delay
From Hi-Z to VPP
IN
(Note 8)
25
85
250
s
4
LTC1472
TYPICAL PERFOR
M
A
N
CE CHARACTERISTICS
U
W
5V
IN
Supply Current (5V ON)
5V
IN
Supply Current (3.3V ON)
5V Switch Resistance
3V
IN
Supply Current (3.3V ON)
3V
IN
Supply Current (OFF)
3.3V Switch Resistance
Inrush Current (3.3V Switch)
Inrush Current (5V Switch)
5V
IN
Supply Current (OFF)
5V
IN
SUPPLY VOLTAGE (V)
0
1
5V
IN
SUPPLY CURRENT (
A)
0
1
2
3
5
1
2
3
4
LTC1472 TPC01
5
6
4
T
A
= 25C V
CC(OUT)
PROGRAMMED TO OFF
5V
IN
SUPPLY VOLTAGE (V)
0
0
5V
IN
SUPPLY CURRENT (
A)
50
100
150
200
300
1
2
3
4
LTC1472 TPC02
5
6
250
T
A
= 25C V
CC(OUT)
PROGRAMMED
TO 5V, NO LOAD
3V
IN
SUPPLY VOLTAGE (V)
0
1
3V
IN
SUPPLY CURRENT (
A)
0
1
2
3
1
2
3
4
LTC1472 TPC04
4
5
T
A
= 25C OUTPUT
PROGRAMMED TO OFF
3V
IN
SUPPLY VOLTAGE (V)
0
0
3V
IN
SUPPLY CURRENT (
A)
20
40
60
80
1
2
3
4
LTC1472 TPC05
100
120
T
A
= 25C V
CC(OUT)
PROGRAMMED TO
3.3V, NO LOAD
TIME (ms)
0.2
INRUSH CURRENT (A)
OUTPUT VOLTAGE (V)
0
1
1.4
LTC1472 TPC09
6
4
0
0.2
0.6
1.0
2
3
2
0
0.4
0.8
1.2
C
OUT
= 150
F
R
OUT
= 6.6
C
OUT
= 150
F
R
OUT
= 6.6
C
OUT
= 15
F
R
OUT
= 6.6
T
J
= 25C
JUNCTION TEMPERATURE (C)
0
0
3.3V SWITCH RESISTANCE (
)
0.05
0.10
0.15
0.20
0.25
0.30
25
50
75
100
LT1472 TPC07
125
V
CC(OUT)
PROGRAMMED
TO 3.3V
TIME (ms)
0.2
INRUSH CURRENT (A)
OUTPUT VOLTAGE (V)
0
1
1.4
LTC1472 TPC08
6
4
0
0.2
0.6
1.0
2
3
2
0
0.4
0.8
1.2
C
OUT
= 150
F
R
OUT
= 10
C
OUT
= 15
F
R
OUT
= 10
T
J
= 25C
CURRENT
LIMITED
5V
IN
SUPPLY VOLTAGE (V)
0
0
5V
IN
SUPPLY CURRENT (
A)
50
100
150
200
300
1
2
3
4
LTC1472 TPC03
5
6
250
T
A
= 25C V
CC(OUT)
PROGRAMMED
TO 3.3V, NO LOAD
JUNCTION TEMPERATURE (C)
0
0
5V SWITCH RESISTANCE (
)
0.05
0.10
0.15
0.20
0.25
0.30
25
50
75
100
LT1472 TPC06
125
V
CC(OUT)
PROGRAMMED
TO 5V
(V
CC
Section) VPP EN0 = VPP EN1 = 0V
5
LTC1472
VPP
IN
SUPPLY VOLTAGE
0
VPP
IN
SUPPLY CURRENT (
A)
80
100
120
6
10
LTC1472 TPC12
60
40
2
4
8
12
14
20
0
T
A
= 25C
VPP
IN
= 12V
NO LOAD
VPP
OUT
PROGRAMMED
TO V
CC(IN)
VPP
OUT
PROGRAMMED
TO VPP
IN
TYPICAL PERFOR
M
A
N
CE CHARACTERISTICS
U
W
VPP
IN
SUPPLY VOLTAGE
0
VPP
IN
SUPPLY CURRENT (
A)
3
4
5
6
10
LTC1472 TPC11
2
1
2
4
8
12
14
0
1
T
A
= 25C
VPP
OUT
PROGRAMMED
TO 0V OR Hi-Z
V
CC(IN)
Supply Current (No Load)
VPP
IN
Supply Current (OFF)
VPP
IN
Supply Current (No Load)
V
DD
Supply Current (ON)
V
CC(IN)
SUPPLY VOLTAGE (V)
0
20
V
CC(IN)
SUPPLY CURRENT (
A)
0
20
40
60
100
1
2
3
4
LTC1472 TPC10
5
6
80
VPP
OUT
PROGRAMMED
TO 0V OR Hi-Z
VPP
OUT
PROGRAMMED
TO VPP
IN
OR V
CC(IN)
T
A
= 25C
V
DD
Supply Current (OFF)
V
DD
Supply Current (No Load)
(VPP Section) V
CC
EN0 = V
CC
EN1 = 0V
V
DD
SUPPLY VOLTAGE (V)
0
1
V
DD
SUPPLY CURRENT (
A)
0
1
2
3
5
1
2
3
4
LTC1472 TPC13
5
6
4
T
A
= 25C
VPP
OUT
PROGRAMMED
TO 0V OR Hi-Z
V
DD
SUPPLY VOLTAGE (V)
0
0
V
DD
SUPPLY CURRENT (
A)
20
40
60
80
120
1
2
3
4
LTC1472 TPC14
5
6
100
T
A
= 25C
VPP
OUT
PROGRAMMED
TO VPP
IN
, NO LOAD
V
DD
SUPPLY VOLTAGE (V)
0
0
V
DD
SUPPLY CURRENT (
A)
20
40
60
80
120
1
2
3
4
LTC1472 TPC15
5
6
100
T
A
= 25C
VPP
OUT
PROGRAMMED
TO VPP
IN
, NO LOAD
VPP
IN
= 0V
VPP
IN
= 12V
Switch Resistances
TEMPERATURE (C)
0
20
40
60
80
0.1
SWITCH RESISTANCE (
)
1
100
LTC1472 TPC16
10
VCC
IN
TO VPP
OUT
VPP
IN
TO VPP
OUT
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