LT1129 Linear Technology, LT1129 Datasheet - Page 6

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LT1129

Manufacturer Part Number
LT1129
Description
Micropower Low Dropout Regulators with Shutdown
Manufacturer
Linear Technology
Datasheet

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LT1129/LT1129-3.3/LT1129-5
6
TYPICAL PERFOR
100
10
30
25
20
15
10
90
80
70
60
50
40
30
20
10
9
8
7
6
5
4
3
2
1
0
5
0
0
–50
–50
Reverse Output Current
0
Shutdown Pin Current
Reverse Output Current
V
V
V
V
V
T
V
(LT1129-3.3/LT1129-5)
V
CURRENT FLOWS
INTO DEVICE
SHDN
IN
OUT
OUT
OUT
J
OUT
OUT
–25
–25
1
= 25°C, V
= 0V
= V
= V
= V
= V
= V
= 0V
2
SENSE
SENSE
ADJ
SENSE
ADJ
0
0
OUTPUT VOLTAGE (V)
LT1129-3.3
TEMPERATURE (°C)
TEMPERATURE (°C)
3
IN
= 3.75V (LT1129)
(LT1129)
= 0V
= 5V (LT1129-5)
= 3.3V (LT1129-3.3)
4
25
25
LT1129
5
50
50
LT1129-5
6
75
75
7
W
8
100
100
A
1129 G25
1129 G29
1129 G30
9
125
125
U
10
CE
C
HARA TERISTICS
1.4
1.2
1.0
0.8
0.6
0.4
0.2
70
68
66
64
62
60
58
56
20
15
10
25
0
0
5
–50
0
Shutdown Pin Input Current
Current Limit
0
Ripple Rejection
V
(V
V
I
L
OUT
RIPPLE
–25
IN
1
= 0.7A
1
– V
= 0V
SHUTDOWN PIN VOLTAGE (V)
C
2
OUT
= 0.5V
2
0
INPUT VOLTAGE (V)
TEMPERATURE (°C)
)
AVG
3
P-P
= 1V
25
3
4
50
5
4
6
75
5
7
100
6
1129 G07
1129 G03
8
1129 G24
125
7
9
100
400
350
300
250
200
150
100
1.4
1.2
1.0
0.8
0.6
0.4
0.2
50
90
80
70
60
50
40
30
20
10
0
0
0
–50
–50
10
Adjust Pin Bias Current
Current Limit
Ripple Rejection
I
V
OUT
V
V
V
IN
ADJ
IN
OUT
–25
–25
= 6V + 50mV
= 7V
= 500mA
100
= V
= 0V
OUT
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
FREQUENCY (Hz)
= 3.75V
1k
RMS
25
25
RIPPLE
50
50
C
10k
TANTALUM
OUT
SOLID
75
75
= 3.3 F
C
TANTALUM
OUT
100k
SOLID
100
100
= 47 F
1129 G08
1129 G01
1129 G28
125
125
1M

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