LT1129/LT1129-3.3/LT1129-5
TYPICAL PERFORMANCE CHARACTERISTICS
LT1129-3.3
Ground Pin Current
60
50
40
30
R
LOAD
= 6.6Ω
I
LOAD
= 500mA*
20
10
0
R
LOAD
= 11Ω
I
LOAD
= 300mA*
*FOR V
OUT
= 3.3V
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
T
J
= 25°C
V
OUT
= V
SENSE
GROUND PIN CURRENT (mA)
LT1129-5
Ground Pin Current
60
50
40
30
20
10
0
R
LOAD
= 16.6Ω
I
LOAD
= 300mA*
*FOR V
OUT
= 5V
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
T
J
= 25°C
V
OUT
= V
SENSE
GROUND PIN CURRENT (mA)
LT1129
Ground Pin Current
60
50
40
30
20
10
0
T
J
= 25°C
V
OUT
= V
ADJ
R
LOAD
= 5.3Ω
I
LOAD
= 700mA*
GROUND PIN CURRENT (mA)
R
LOAD
= 4.7Ω
I
LOAD
= 700mA*
R
LOAD
= 7.1Ω
I
LOAD
= 700mA*
R
LOAD
= 10Ω
I
LOAD
= 500mA*
R
LOAD
= 7.5Ω
I
LOAD
= 500mA*
R
LOAD
= 12.6Ω
I
LOAD
= 300mA*
*FOR V
OUT
= 3.75V
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
112935 G13
112935 G14
112935 G15
Ground Pin Current
70
60
V
IN
= 3.3V (LT1129-3.3)
V
IN
= 5V (LT1129-5)
V
IN
= 3.75V (LT1129)
DEVICE IS OPERATING
IN DROPOUT
2.0
1.8
Shutdown Pin Threshold
(On-to-Off)
2.0
I
LOAD
= 1mA
1.8
Shutdown Pin Threshold
(Off-to-On)
GROUND PIN CURRENT (mA)
SHUTDOWN THRESHOLD (V)
SHUTDOWN THRESHOLD (V)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
I
LOAD
= 700mA
50
40
T
J
= 125°C
I
LOAD
= 1mA
T
J
= 25°C
30
20
T
J
= –50°C
10
0
0
0.1
0.2 0.3 0.4
0.5
OUTPUT CURRENT (A)
0.6
0.7
0
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
0
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
112935 G16
112935 G17
112935 G18
Shutdown Pin Current
10
9
SHUTDOWN PIN CURRENT (μA)
SHUTDOWN PIN INPUT CURRENT (mA)
Shutdown Pin Input Current
25
400
ADJUST PIN BIAS CURRENT (nA)
Adjust Pin Bias Current
350
300
250
200
150
100
50
V
ADJ
= V
OUT
= 3.75V
V
SHDN
= 0V
8
7
6
5
4
3
2
1
0
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
20
15
10
5
0
0
1
7
3
8
2
5
6
4
SHUTDOWN PIN VOLTAGE (V)
9
0
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
112935 G19
112935 G20
112935 G21
112935ff
7
LINER [ LINEAR TECHNOLOGY ]
