LT1763CDE-3 Просмотр технического описания (PDF) - Linear Technology
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LT1763CDE-3 Datasheet PDF : 22 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
LT1763 Series
SHDN Pin Input Current
1.6
VSHDN = 20V
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
1763 G37
ADJ Pin Bias Current
140
120
100
80
60
40
20
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1763 G38
Current Limit
1.0
0.9 VOUT = 0V
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
01 2 34 5
INPUT VOLTAGE (V)
67
1763 G39
Current Limit
1.2
1.0
VIN = 7
VOUT = 0V
0.8
0.6
0.4
0.2
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1763 G40
Reverse Output Current
100
90
TJ = 25°C, VIN = 0V
CURRENT FLOWS
80
INTO OUTPUT PIN
VOUT = VADJ (LT1763)
70
LT1763
60
LT1763-1.8
50 LT1763-2.5
40 LT1763-3
LT1763-3.3
30
LT1763-1.5
20
10
LT1763-5
0
0 1 2 3 4 5 6 7 8 9 10
OUTPUT VOLTAGE (V)
1763 G41
Reverse Output Current
20
VIN = 0V, VOUT = 1.22V (LT1763)
18 VOUT = 1.5V (LT1763-1.5)
16
VOUT = 1.8V (LT1763-1.8)
VOUT = 2.5V (LT1763-2.5)
14 VOUT = 3V (LT1763-3)
VOUT = 3.3V (LT1763-3.3)
12 VOUT = 5V (LT1763-5)
10
8
LT1763-1.5/-1.8/
6
-2.5/-3/-3.3/-5
4
LT1763
2
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1763 G42
Input Ripple Rejection
80
70
60
50
COUT = 10μF
40
30
20 IL = 500mA
VIN = VOUT(NOMINAL) +
10 1V + 50mVRMS RIPPLE
CBYP = 0
COUT = 4.7μF
0
10
100
1k
10k 100k 1M
FREQUENCY (Hz)
1763 G43
Input Ripple Rejection
80
70 CBYP = 0.01μF
60
50 CBYP = 1000pF
CBYP = 100pF
40
30
20 IL = 500mA
VIN = VOUT(NOMINAL) +
10 1V + 50mVRMS RIPPLE
COUT = 10μF
0
10
100
1k
10k
FREQUENCY (Hz)
100k 1M
1763 G44
Ripple Rejection
68
66
64
62
60
58
56 VIN = VOUT (NOMINAL) +
1V + 0.5VP-P RIPPLE
54 AT f = 120Hz
IL = 500mA
52
–50 –25 0 25 50 75
TEMPERATURE (°C)
100 125
1763 G45
1763fg
11
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