LT138A/LT338A
LM138/LM338
ELECTRICAL CHARACTERISTICS
SYMBOL
V
REF
PARAMETER
Reference Voltage
CONDITIONS
I
OUT
= 10mA, T
J
= 25°C
3V ≤ (V
IN
– V
OUT
) ≤ 35V,
10mA ≤ I
OUT
≤ 5A, P ≤ 50W
ΔV
OUT
ΔV
IN
ΔV
OUT
ΔV
OUT
Line Regulation
Load Regulation
3V ≤ (V
IN
– V
OUT
) ≤ 35V, (Note 3)
10mA ≤ I
OUT
≤ 5A, (Note 3)
V
OUT
≤ 5V
V
OUT
≥ 5V
V
OUT
≤ 5V
V
OUT
≥ 5V
Thermal Regulation
Ripple Rejection
20ms Pulse
V
OUT
= 10V, f = 120Hz
C
ADJ
= 0μF
C
ADJ
= 10μF
10mA ≤ I
OUT
≤ 5A,
3V ≤ (V
IN
– V
OUT
) ≤ 35V
(V
IN
– V
OUT
) = 35V
(V
IN
– V
OUT
) ≤ 10V
DC
0.5ms Peak
(V
IN
– V
OUT
) = 30V, T
J
= 25ºC
ΔV
OUT
ΔTemp
ΔV
OUT
ΔTime
e
n
θ
JC
Temperature Stability
Long-Term Stability
T
A
= 125ºC, 1000 Hours
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The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2)
MIN
1.238
1.225
LT138A
TYP
1.250
1.250
0.005
0.02
5
0.1
20
0.3
0.002
60
75
45
0.2
3.5
5
6
8
12
1
1
0.3
0.001
1
2
2
1
100
5
5
5
6
MAX
1.262
1.270
0.01
0.04
15
0.3
30
0.6
0.01
1.119
1.24
0.005
0.02
5
0.1
20
0.3
0.002
60
75
45
0.2
3.5
8
12
1
1
0.3
0.003
1
1
100
5
5
1.29
0.01
0.04
15
0.3
30
0.6
0.01
MIN
LM138
TYP
MAX
UNITS
V
V
%/V
%/V
mV
%
mV
%
%/W
dB
dB
μA
μA
mA
A
A
A
%
%
%
ºC/W
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60
I
ADJ
ΔI
ADJ
Adjust Pin Current
Adjust Pin Current Change
Minimum Load Current
I
SC
Current Limit
RMS Output Noise (% of V
OUT
) 10HZ ≤ f ≤ 10kHz
Thermal Resistance
Junction-to-Case
K Package
The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
SYMBOL
V
REF
PARAMETER
Reference Voltage
CONDITIONS
I
OUT
= 10mA
3V ≤ (V
IN
– V
OUT
) ≤ 35V,
10mA ≤ I
OUT
≤ 5A, P ≤ 50W
ΔV
OUT
ΔV
IN
ΔV
OUT
ΔV
OUT
Line Regulation
Load Regulation
3V ≤ (V
IN
– V
OUT
) ≤ 35V, (Note 3)
10mA ≤ I
OUT
≤ 5A, (Note 3)
V
OUT
≤ 5V
V
OUT
≥ 5V
V
OUT
≤ 5V
V
OUT
≥ 5V
Thermal Regulation
Ripple Rejection
20ms Pulse
V
OUT
= 10V, f = 120Hz
C
ADJ
= 0μF
C
ADJ
= 10μF
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MIN
1.238
1.225
LT138A
TYP
1.250
1.250
0.005
0.02
5
0.1
20
0.3
0.002
60
75
MAX
1.262
1.270
0.01
0.04
15
0.3
30
0.6
0.02
MIN
1.19
LM138
TYP
1.24
0.005
0.02
5
0.1
20
0.3
0.002
60
75
MAX
1.29
0.03
0.06
25
0.5
50
1
0.02
UNITS
V
V
%/V
%/V
mV
%
mV
%
%/W
dB
dB
138afc
l
60
60
3
LINER [ LINEAR TECHNOLOGY ]
