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