LT1129/LT1129-3.3/LT1129-5
U W
TYPICAL PERFOR A CE CHARACTERISTICS
LT1129-3.3
Ground Pin Current
LT1129-5
Ground Pin Current
LT1129
Ground Pin Current
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
T = 25°C
T = 25°C
T = 25°C
J
J
V
J
R
LOAD
= 50Ω
LOAD
V
V
=
= V
V
V
=
OUT
SENSE
OUT
SENSE
OUT
ADJ
I
= 100mA*
R
LOAD
= 33Ω
LOAD
R
LOAD
= 38Ω
I
= 100mA*
LOAD
I
= 100mA*
R = 100Ω
LOAD
I = 50mA*
LOAD
R
= 66Ω
= 50mA*
LOAD
R
LOAD
= 75Ω
LOAD
I
LOAD
I
= 50mA*
R
LOAD
= 500Ω
= 10mA*
R
= 330Ω
= 10mA*
R
= 375Ω
= 10mA*
LOAD
LOAD
LOAD
I
I
I
LOAD
LOAD
*For V
3
= 3.3V
*For V
3
= 5V
5
*For V
3
= 3.75V
OUT
OUT
OUT
4
0
1
2
4
5
6
7
8
9
10
0
1
2
4
6
7
8
9
10
0
1
2
5
6
7
8
9
10
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
1129 G18
1129 G19
1129 G20
LT1129-3.3
Ground Pin Current
LT1129-5
Ground Pin Current
LT1129
Ground Pin Current
60
50
40
30
20
10
0
60
50
40
30
20
10
0
60
50
40
30
20
10
0
T
= 25°C
T
V
= 25°C
J
OUT
T
= 25°C
J
J
V
= V
= V
SENSE
V
= V
OUT
SENSE
OUT
ADJ
R
LOAD
= 5.3Ω
LOAD
R
LOAD
= 7.1Ω
I
I
= 700mA*
LOAD
R
LOAD
= 4.7Ω
I
I
= 700mA*
LOAD
I
= 700mA*
R
LOAD
= 10Ω
= 500mA*
LOAD
R
LOAD
= 6.6Ω
= 500mA*
R
LOAD
= 7.5Ω
LOAD
= 500mA*
LOAD
I
R
LOAD
= 11Ω
R
= 16.6Ω
= 300mA*
R
= 12.6Ω
LOAD
LOAD
LOAD
I
= 300mA*
I
I
= 300mA*
LOAD
LOAD
*For V
= 3.3V
6
*For V
4
= 5V
*For V
= 3.75V
OUT
5
OUT
5
OUT
5
0
2
4
8
10
1
3
7
9
0
2
6
8
10
0
2
4
6
8
10
1
3
7
9
1
3
7
9
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
1129 G21
1129 G22
1129 G23
Shutdown Pin Threshold
(On-to-Off)
Shutdown Pin Threshold
(Off-to-On)
Ground Pin Current
70
60
50
40
30
20
10
0
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
V
V
V
= 3.3V (LT1129-3.3)
= 5V (LT1129-5)
= 3.75V (LT1129)
I
= 1mA
IN
IN
IN
LOAD
I
I
= 700mA
= 1mA
LOAD
DEVICE IS OPERATING
IN DROPOUT
T
= 125°C
= –50°C
J
LOAD
T
J
= 25°C
T
J
50
75 100 125
–50 –25
0
25
50
75 100 125
0
0.2 0.3 0.4
0.5 0.6 0.7
–50 –25
0
25
0.1
OUTPUT CURRENT (A)
TEMPERATURE (°C)
TEMPERATURE (°C)
1129 G15
1129 G27
1129 G26
112935fc
6
Linear Systems [ Linear Systems ]
