Datasheet

LT1129/LT1129-3.3/LT1129-5
7
112935ff
TYPICAL PERFORMANCE CHARACTERISTICS
LT1129-3.3
Ground Pin Current
LT1129-5
Ground Pin Current
LT1129
Ground Pin Current
Ground Pin Current
Shutdown Pin Threshold
(On-to-Off)
Shutdown Pin Threshold
(Off-to-On)
INPUT VOLTAGE (V)
0
GROUND PIN CURRENT (mA)
60
50
40
30
20
10
0
8
112935 G14
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
INPUT VOLTAGE (V)
0
GROUND PIN CURRENT (mA)
60
50
40
30
20
10
0
8
112935 G15
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
OUTPUT CURRENT (A)
0
GROUND PIN CURRENT (mA)
70
60
50
40
30
20
10
0
0.2
0.4
0.5
112935 G16
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
112935 G17
–25
25
100
125
I
LOAD
= 1mA
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
112935 G18
–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
112935 G13
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
Shutdown Pin Current Shutdown Pin Input Current Adjust Pin Bias Current
TEMPERATURE (°C)
–50
ADJUST PIN BIAS CURRENT (nA)
400
350
300
250
200
150
100
50
0
0
50
75
112935 G21
–25
25
100
125
V
ADJ
= V
OUT
= 3.75V
SHUTDOWN PIN VOLTAGE (V)
0
0
SHUTDOWN PIN INPUT CURRENT (mA)
5
15
20
25
2
4
59
112935 G20
10
13
6
7
8
TEMPERATURE (°C)
–50
SHUTDOWN PIN CURRENT (μA)
10
9
8
7
6
5
4
3
2
1
0
0
50
75
112935 G19
–25
25
100
125
V
SHDN
= 0V