Datasheet

LTC1955
5
1955fd
For more information www.linear.com/LTC1955
Typical perForMance characTerisTics
V
CCX
Overcurrent Shutdown
Threshold vs Temperature
Card Detection Debounce Time
vs V
BATT
Supply Voltage
Bidirectional Channel (I/O A, I/O B)
Low Output Level vs Temperature
V
BATT
Quiescent Current
[I
BATT
– 2 (I
CCA
+ I
CCB
)]
vs Load Current
V
BATT
Shutdown Current
vs Supply Voltage
DV
CC
Shutdown Current
vs Supply Voltage
No Load Supply Current vs V
BATT
I/O X Short-Circuit Current
vs Temperature
Charge Pump Open-Loop Output
Resistance vs Temperature
(2V
IN
– V
CPO
) / I
LOAD(MAX)
SUPPLY VOLTAGE (V)
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY CURRENT (µA)
1955 G01
600
500
400
300
200
100
0
T
A
= 25°C
I
CCA
= I
CCB
= 0µA
V
CCA
= V
CCB
= 5V
V
CCA
= 1.8V, V
CCB
= 0V
TEMPERATURE (°C)
–40
–15 10 35 60 85
SHORT-CIRCUIT CURRENT (mA)
1955 G02
6.0
5.5
5.0
4.5
4.0
3.5
DV
CC
= V
BATT
= 5.5V
V
CCX
= 5V
TEMPERATURE (°C)
–40
–15 10 35 60 85
OUTPUT RESISTANCE (Ω)
1955 G03
7.0
6.5
6.0
5.5
5.0
4.5
V
IN
= 2.7V
V
CPO
= 4.9V
TEMPERATURE (°C)
–40
–15 10 35 60 85
LOAD CURRENT (mA)
1955 G04
180
160
140
120
100
80
V
BATT
= 3.3V
V
CPO
= 5.75V
V
CCX
= 1.8V
V
CCX
= 3V
V
CCX
= 5V
V
BATT
SUPPLY VOLTAGE (V)
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
DEBOUNCE TIME (ms)
1955 G05
60
55
50
45
40
35
30
25
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
TEMPERATURE (°C)
–40
–15 10 35 60 85
I/O A, I/O B LOW OUTPUT VOLTAGE (V)
1955 G06
0.16
0.14
0.12
0.10
0.08
0.06
V
DATA
= 0V
I
OL
= –1mA
V
BATT
= 2.7V
V
CCX
= 1.8V
V
CCX
= 3V
V
CCX
= 5V
LOAD CURRENT (A)
V
BATT
QUIESCENT CURRENT (mA)
10
9
8
7
6
5
4
3
2
1
0
10µ 1m 10m
1955 G07
100µ 100m
V
BATT
= 3.1V
T
A
= 25°C
V
BATT
SUPPLY VOLTAGE (V)
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY CURRENT (µA)
1955 G08
3.0
2.5
2.0
1.5
1.0
0.5
0
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
V
DVCC
= V
BATT
V
DVCC
SUPPLY VOLTAGE (V)
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY CURRENT (µA)
1955 G09
1.0
0.8
0.6
0.4
0.2
0
T
A
= 25°C, 85°C
T
A
= –40°C
V
DVCC
= V
BATT