LT138A/LT338A
LM138/LM338
TYPICAL PERFOR A CE CHARACTERISTICS
Load Regulation
0.2
V
IN
= 15V
V
OUT
= 10V
PRELOAD = 50mA
I
OUT
= 3A
I
OUT
= 5A
4
OUTPUT VOLTAGE DEVIATION (%)
ADJUSTMENT CURRENT (µA)
0.1
0
– 0.1
– 0.2
– 0.3
INPUT-OUTPUT DIFFERENTIAL (V)
– 0.4
–75 – 50 – 25
0 25 50 75 100 125 150
TEMPERATURE (°C)
138/338 G01
Temperature Stability
1.270
10
OUTPUT IMPEDANCE (Ω)
1.260
QUIESCENT CURRENT (mA)
REFERENCE VOLTAGE (V)
1.250
1.240
1.230
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
138A/338A G04
Ripple Rejection
100
C
ADJ
= 10µF
80
RIPPLE REJECTION (dB)
RIPPLE REJECTION (dB)
C
ADJ
= 0µF
60
60
C
ADJ
= 0µF
40
RIPPLE REJECTION (dB)
40
V
IN
– V
OUT
= 5V
I
OUT
= 500mA
f = 120Hz
T
J
= 25°C
0
5
20
15
10
25
OUTPUT VOLTAGE (V)
30
35
20
0
4
U W
138A/338A G07
Dropout Voltage
∆V
OUT
= 100mV
65
60
55
50
45
40
35
1
–75 – 50 – 25
Adjustment Current
3
I
OUT
= 5A
I
OUT
= 3A
2
I
OUT
= 1A
0 25 50 75 100 125 150
TEMPERATURE (°C)
138/338 G02
30
–75
–25
25
75
TEMPERATURE (°C)
125
138A/338A G03
Output Impedance
V
IN
= 15V
V
OUT
= 10V
I
OUT
= 500mA
C
ADJ
= C
OUT
= 0µF
5
Minimum Operating Current
1
4
T
J
= 150°C
T
J
= 25°C
3
T
J
= – 55°C
0.1
0.01
C
ADJ
= C
OUT
= 10µF
2
0.001
1
0.0001
0
10
100
10k
1k
FREQUENCY (Hz)
100k
1M
0
25 30 35
5
10 15 20
INPUT-OUTPUT DIFFERENTIAL (V)
40
138/338 G05
138A/338A G06
Ripple Rejection
100
80
Ripple Rejection
C
ADJ
= 10µF
80
C
ADJ
= 10µF
70
C
ADJ
= 0µF
60
50
20
0
V
IN
= 15V
V
OUT
= 10V
I
OUT
= 0.2A
10
100
10k
1k
FREQUENCY (Hz)
100k
1M
40
V
IN
= 15V
V
OUT
= 10V
f = 120Hz
T
CASE
= 25°C
0.1
1
OUTPUT CURRENT (A)
10
138/338 G09
138A/338A G08
138afb
LINER [ LINEAR TECHNOLOGY ]
