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Номер в каталоге
Компоненты Описание
LT1129CF-3.3 Просмотр технического описания (PDF) - Linear Integrated System
Номер в каталоге
Компоненты Описание
производитель
LT1129CF-3.3
Micropower Low Dropout Regulators with Shutdown
Linear Integrated System
LT1129CF-3.3 Datasheet PDF : 16 Pages
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LT 1129/LT 1129-3.3/LT 1129-5
TYPICAL PERFOR A CE CHARACTERISTICS
LT1129-3.3
Ground Pin Current
2.0
1.8
T
J
= 25
°
C
V
OUT
=
1.6
V
SENSE
1.4
R
LOAD
= 33
Ω
I
LOAD
= 100mA*
1.2
1.0
R
LOAD
= 66
Ω
I
LOAD
= 50mA*
0.8
0.6
0.4
R
LOAD
= 330
Ω
I
LOAD
= 10mA*
0.2
*For V
OUT
= 3.3V
0
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
1129 G18
LT1129-3.3
Ground Pin Current
60
T
J
= 25
°
C
V
OUT
= V
SENSE
50
40
R
LOAD
= 4.7
Ω
I
LOAD
= 700mA*
30
R
LOAD
= 6.6
Ω
I
LOAD
= 500mA*
20
R
LOAD
= 11
Ω
10
I
LOAD
= 300mA*
*For V
OUT
= 3.3V
0
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
1129 G21
Ground Pin Current
70
V
IN
= 3.3V (LT1129-3.3)
60
V
IN
= 5V (LT1129-5)
V
IN
= 3.75V (LT1129)
50
DEVICE IS OPERATING
IN DROPOUT
T
J
= 125
°
C
40
T
J
= 25
°
C
30
20
T
J
= –50
°
C
10
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
OUTPUT CURRENT (A)
1129 G15
LT1129-5
Ground Pin Current
2.0
1.8
T
J
= 25
°
C
V
OUT
= V
SENSE
1.6
R
LOAD
= 50
Ω
I
LOAD
= 100mA*
1.4
1.2
R
LOAD
= 100
Ω
1.0
I
LOAD
= 50mA*
0.8
0.6
R
LOAD
= 500
Ω
0.4
I
LOAD
= 10mA*
0.2
*For V
OUT
= 5V
0
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
1129 G19
LT1129-5
Ground Pin Current
60
T
J
= 25
°
C
V
OUT
= V
SENSE
50
40
R
LOAD
= 7.1
Ω
I
LOAD
= 700mA*
30
R
LOAD
= 10
Ω
I
LOAD
= 500mA*
20
R
LOAD
= 16.6
Ω
10
I
LOAD
= 300mA*
*For V
OUT
= 5V
0
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
1129 G22
Shutdown Pin Threshold
(On-to-Off)
2.0
1.8
I
LOAD
= 1mA
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–50 –25
0 25 50 75
TEMPERATURE (
°
C)
100 125
1129 G27
6
LT1129
Ground Pin Current
2.0
1.8
T
J
= 25
°
C
V
OUT
=
1.6
V
ADJ
1.4
R
LOAD
= 38
Ω
I
LOAD
= 100mA*
1.2
1.0
R
LOAD
= 75
Ω
0.8
I
LOAD
= 50mA*
0.6
R
LOAD
= 375
Ω
0.4
I
LOAD
= 10mA*
0.2
*For V
OUT
= 3.75V
0
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
1129 G20
LT1129
Ground Pin Current
60
T
J
= 25
°
C
V
OUT
= V
ADJ
50
R
LOAD
= 5.3
Ω
40
I
LOAD
= 700mA*
30
R
LOAD
= 7.5
Ω
I
LOAD
= 500mA*
20
R
LOAD
= 12.6
Ω
10
I
LOAD
= 300mA*
*For V
OUT
= 3.75V
0
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
1129 G23
Shutdown Pin Threshold
(Off-to-On)
2.0
1.8
1.6
I
LOAD
= 700mA
1.4
1.2
I
LOAD
= 1mA
1.0
0.8
0.6
0.4
0.2
0
–50 –25
0 25 50 75 100 125
TEMPERATURE (
°
C)
1129 G26
112935fc
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