LM338K Просмотр технического описания (PDF) - Linear Technology
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LM338K Datasheet PDF : 12 Pages
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LT138A/LT338A
LM138/LM338
TYPICAL PERFOR A CE CHARACTERISTICS
Load Regulation
0.2
VIN = 15V
VOUT = 10V
0.1 PRELOAD = 50mA
0
IOUT = 3A
– 0.1
IOUT = 5A
– 0.2
– 0.3
– 0.4
–75 – 50 – 25 0 25 50 75 100 125 150
TEMPERATURE (°C)
138/338 G01
Temperature Stability
1.270
1.260
1.250
1.240
Dropout Voltage
4
∆VOUT = 100mV
3
IOUT = 5A
IOUT = 3A
2
IOUT = 1A
1
–75 – 50 – 25 0 25 50 75 100 125 150
TEMPERATURE (°C)
138/338 G02
Output Impedance
10
VIN = 15V
VOUT = 10V
1 IOUT = 500mA
CADJ = COUT = 0µF
0.1
0.01
0.001
CADJ = COUT = 10µF
1.230
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
138A/338A G04
Ripple Rejection
100
CADJ = 10µF
80
CADJ = 0µF
60
40
20
VIN – VOUT = 5V
IOUT = 500mA
f = 120Hz
TJ = 25°C
0
0 5 10 15 20 25 30 35
OUTPUT VOLTAGE (V)
138A/338A G07
0.0001
10
100
1k
10k 100k 1M
FREQUENCY (Hz)
138/338 G05
Ripple Rejection
100
80
CADJ = 10µF
60
CADJ = 0µF
40
20 VIN = 15V
VOUT = 10V
IOUT = 0.2A
0
10
100
1k
10k 100k 1M
FREQUENCY (Hz)
138A/338A G08
Adjustment Current
65
60
55
50
45
40
35
30
– 75
– 25
25
75
125
TEMPERATURE (°C)
138A/338A G03
Minimum Operating Current
5
4
TJ = 150°C
TJ = 25°C
3
TJ = – 55°C
2
1
0
0 5 10 15 20 25 30 35 40
INPUT-OUTPUT DIFFERENTIAL (V)
138A/338A G06
Ripple Rejection
80
CADJ = 10µF
70
CADJ = 0µF
60
50 VIN = 15V
VOUT = 10V
f = 120Hz
TCASE = 25°C
40
0.1
1
OUTPUT CURRENT (A)
10
138/338 G09
138afb
4
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