LT1129CF-3.3 Просмотр технического описания (PDF) - Linear Integrated System
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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
Shutdown Pin Current
10
9 VSHDN = 0V
8
7
6
5
4
3
2
1
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1129 G25
Reverse Output Current
30
VIN = 0V
25
VOUT = VSENSE = 5V (LT1129-5)
VOUT = VSENSE = 3.3V (LT1129-3.3)
VOUT = VADJ = 3.75V (LT1129)
20
15
10
5
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1129 G29
Reverse Output Current
100
90
TJ = 25°C, VIN = 0V
VOUT = VSENSE
80 (LT1129-3.3/LT1129-5)
VOUT = VADJ (LT1129)
70 CURRENT FLOWS
60 INTO DEVICE
50
LT1129
40
30
LT1129-3.3
20
LT1129-5
10
0
012345 678
OUTPUT VOLTAGE (V)
9 10
1129 G30
Shutdown Pin Input Current
25
20
15
10
5
0
01 2 3 4 5 6 7 8 9
SHUTDOWN PIN VOLTAGE (V)
1129 G24
Current Limit
1.4
VOUT = 0V
1.2
1.0
0.8
0.6
0.4
0.2
0
0 1 2 34 5
INPUT VOLTAGE (V)
67
1129 G07
Ripple Rejection
70
(VIN – VOUT)AVG = 1V
68 VRIPPLE = 0.5VP-P
IL = 0.7A
66
64
62
60
58
56
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1129 G03
Adjust Pin Bias Current
400
VADJ = VOUT = 3.75V
350
300
250
200
150
100
50
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1129 G28
Current Limit
1.4
1.2
1.0
0.8
0.6
0.4
0.2 VIN = 7V
VOUT = 0V
0
–50 –25 0 25 50 75
TEMPERATURE (°C)
100 125
1129 G08
Ripple Rejection
100
90
IOUT = 500mA
VIN = 6V + 50mVRMS RIPPLE
80
70
COUT = 47µF
60
SOLID
TANTALUM
50
40
30
20
10
0
10
COUT = 3.3µF
SOLID
TANTALUM
100
1k
10k 100k 1M
FREQUENCY (Hz)
1129 G01
112935fc
7
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