LT138A/LT338A
LM138/LM338
TYPICAL PERFORMANCE CHARACTERISTICS
Temperature Stability
1.270
10
Output Impedance
V
IN
= 15V
V
OUT
= 10V
I
OUT
= 500mA
C
ADJ
= C
OUT
= 0μF
5
Minimum Operating Current
1.260
QUIESCENT CURRENT (mA)
REFERENCE VOLTAGE (V)
OUTPUT IMPEDANCE (Ω)
1
4
T
J
= 150°C
T
J
= 25°C
3
T
J
= –55°C
0.1
1.250
0.01
C
ADJ
= C
OUT
= 10μF
2
1.240
0.001
1
1.230
–50 –25
0.0001
0
25 50 75 100 125 150
TEMPERATURE (°C)
138A/338A G04
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
C
ADJ
= 10μF
80
RIPPLE REJECTION (dB)
C
ADJ
= 0μF
60
RIPPLE REJECTION (dB)
100
Ripple Rejection
80
Ripple Rejection
C
ADJ
= 10μF
60
C
ADJ
= 0μF
40
RIPPLE REJECTION (dB)
80
C
ADJ
= 10μF
70
C
ADJ
= 0μF
60
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
50
20
20
0
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 G07
138A/338A G08
Current Limit
16
PEAK CURRENT LIMIT
DC CURRENT LIMIT
T
CASE
= 25°C
OUTPUT CURRENT (A)
PRELOAD = 0A
14
12
Current Limit
14
12
PRELOAD = 0A
OUTPUT CURRENT (A)
10
8
6
4
2
V
IN
= 10V
V
OUT
= 5V
T
CASE
= 25°C
1
TIME (ms)
138A/338A G11
Current Limit
PRELOAD CURRENT = 0
T
CASE
= 25°C
OUTPUT CURRENT (A)
12
10
V
IN
– V
OUT
= 10V
8
6
4
2
0
0.1
V
IN
– V
OUT
= 15V
V
IN
– V
OUT
= 20V
V
IN
– V
OUT
= 30V
PRELOAD = 5A
PRELOAD = 5A
8
PRELOAD = 1A
4
0
0
20
10
30
INPUT-OUTPUT DIFFERENTIAL (V)
40
0
0.1
10
100
1
TIME (ms)
10
100
138A/338A G12
138A/338A G10
138afc
5
LINER [ LINEAR TECHNOLOGY ]
