Datasheet

5
LT1129/LT1129-3.3/LT1129-5
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
INPUT VOLTAGE (V)
0
GROUND PIN CURRENT (mA)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
8
1129 G20
2
4
6
10
13579
R
LOAD
= 75Ω
I
LOAD
= 50mA*
R
LOAD
= 375Ω
I
LOAD
= 10mA*
R
LOAD
= 38Ω
I
LOAD
= 100mA*
*For V
OUT
= 3.75V
T
J
= 25°C
V
OUT
=
V
ADJ
INPUT VOLTAGE (V)
0
GROUND PIN CURRENT (mA)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
8
1129 G19
2
4
6
10
13579
R
LOAD
= 100Ω
I
LOAD
= 50mA*
R
LOAD
= 500Ω
I
LOAD
= 10mA*
R
LOAD
= 50Ω
I
LOAD
= 100mA*
*For V
OUT
= 5V
T
J
= 25°C
V
OUT
= V
SENSE
LT1129
Ground Pin Current
LT1129-5
Ground Pin Current
LT1129-3.3
Ground Pin Current
INPUT VOLTAGE (V)
0
GROUND PIN CURRENT (mA)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
8
1129 G18
2
4
6
10
13579
R
LOAD
= 66Ω
I
LOAD
= 50mA*
R
LOAD
= 330Ω
I
LOAD
= 10mA*
R
LOAD
= 33Ω
I
LOAD
= 100mA*
T
J
= 25°C
V
OUT
=
V
SENSE
*For V
OUT
= 3.3V
LT1129-3.3
Ground Pin Current
INPUT VOLTAGE (V)
0
GROUND PIN CURRENT (mA)
60
50
40
30
20
10
0
8
1129 G22
2
4
6
10
13579
R
LOAD
= 10Ω
I
LOAD
= 500mA*
R
LOAD
= 16.6Ω
I
LOAD
= 300mA*
R
LOAD
= 7.1Ω
I
LOAD
= 700mA*
*For V
OUT
= 5V
T
J
= 25°C
V
OUT
= V
SENSE
LT1129-5
Ground Pin Current
INPUT VOLTAGE (V)
0
GROUND PIN CURRENT (mA)
60
50
40
30
20
10
0
8
1129 G23
2
4
6
10
13579
R
LOAD
= 7.5Ω
I
LOAD
= 500mA*
R
LOAD
= 12.6Ω
I
LOAD
= 300mA*
R
LOAD
= 5.3Ω
I
LOAD
= 700mA*
*For V
OUT
= 3.75V
T
J
= 25°C
V
OUT
= V
ADJ
LT1129
Ground Pin Current
Ground Pin Current
OUTPUT CURRENT (A)
0
GROUND PIN CURRENT (mA)
70
60
50
40
30
20
10
0
0.2
0.4
0.5
1129 G15
0.1
0.3
0.6
0.7
T
J
= 25°C
T
J
= 125°C
T
J
= –50°C
V
IN
= 3.3V (LT1129-3.3)
V
IN
= 5V (LT1129-5)
V
IN
= 3.75V (LT1129)
DEVICE IS OPERATING
IN DROPOUT
TEMPERATURE (°C)
–50
SHUTDOWN THRESHOLD (V)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
50
75
1129 G27
–25
25
100
125
I
LOAD
= 1mA
Shutdown Pin Threshold
(On-to-Off)
Shutdown Pin Threshold
(Off-to-On)
TEMPERATURE (°C)
–50
SHUTDOWN THRESHOLD (V)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
50
75
1129 G26
–25
25
100
125
I
LOAD
= 1mA
I
LOAD
= 700mA
INPUT VOLTAGE (V)
0
GROUND PIN CURRENT (mA)
60
50
40
30
20
10
0
8
1129 G21
2
4
6
10
13579
R
LOAD
= 6.6Ω
I
LOAD
= 500mA*
R
LOAD
= 11Ω
I
LOAD
= 300mA*
R
LOAD
= 4.7Ω
I
LOAD
= 700mA*
*For V
OUT
= 3.3V
T
J
= 25°C
V
OUT
= V
SENSE