LT1129IST-3.3TRPBF Просмотр технического описания (PDF) - Linear Technology
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LT1129IST-3.3TRPBF Datasheet PDF : 16 Pages
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LT1129/LT1129-3.3/LT1129-5
TYPICAL PERFORMANCE CHARACTERISTICS
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
112935 G22
Current Limit
1.4
VOUT = 0V
1.2
1.0
0.8
0.6
0.4
0.2
0
01
2 34 5
INPUT VOLTAGE (V)
67
112935 G23
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
112935 G24
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
0 1 2 3 4 5 6 7 8 9 10
OUTPUT VOLTAGE (V)
112935 G25
Load Regulation
0
LT1129-3.3
–5
–10
LT1129*
LT1129-5
–15
–20
VIN = VOUT(NOMINAL) + 1V
–25 ΔILOAD = 1mA to 700mA
*VADJ = VOUT
–30
–50 –25 0 25 50 75
TEMPERATURE (°C)
100 125
112935 G28
8
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
112935 G26
LT1129-5
Transient Response
0.10
0.05
0
–0.05
–0.10
VIN = 6V
CIN = 3.3μF
COUT = 3.3μF
0.6
0.5
0 50 100 150 200 250 300 350 400 450 500
TIME (μs)
112935 G29
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)
112935 G27
LT1129-5
Transient Response
0.2
VIN = 6V
CIN = 3.3μF
0.1 COUT = 47μF
0
–0.1
–0.2
0.7
0.5
0.3
0.1
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
TIME (ms)
112935 G30
112935ff
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