LT138A/LT338A
LM138/LM338
ABSOLUTE
AXI U
RATI GS
Power Dissipation .............................. Internally Limited
Input-to-Output Voltage Differential ........................ 35V
Operating Junction Temperature Range
LT138A/LM138 ............................... – 55°C to 150°C
LT338A/LM338 ................................... 0°C to 125°C
PRECONDITIONI G
100% Thermal Limit Burn-In
PACKAGE/ORDER I FOR ATIO
BOTTOM VIEW
V
IN
2
CASE
IS OUTPUT
1
ADJ
K PACKAGE
2-LEAD TO-3 METAL CAN
T
JMAX
= 150°C,
θ
JA
= 35°C/ W,
θ
JC
= 1°C/ W (LT138A/LT138)
T
JMAX
= 125°C,
θ
JA
= 35°C/ W,
θ
JC
= 1°C/ W (LT338A/LT338)
ORDER
PART NUMBER
LT138AK
LT338AK
LM138K
LM338K
FRONT VIEW
3
2
1
P PACKAGE
3-LEAD PLASTIC TO-3P
T
JMAX
= 125°C,
θ
JA
= 45°C/ W
V
OUT
V
IN
ADJ
Consult factory for Industrial grade parts.
The
q
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2)
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
∆V
OUT
∆V
IN
∆V
OUT
∆I
OUT
Line Regulation
Load Regulation
3V
≤
(V
IN
– V
OUT
)
≤
35V, (Note 3)
q
q
ELECTRICAL CHARACTERISTICS
MIN
1.238
1.225
LT138A
TYP
MAX
1.250
1.250
0.005
0.02
5
0.1
1.262
1.270
0.01
0.04
15
0.3
30
0.6
0.01
10mA
≤
I
OUT
≤
5A, (Note 3)
V
OUT
≤
5V
V
OUT
≥
5V
V
OUT
≤
5V
V
OUT
≥
5V
q
q
20
0.3
0.002
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
= 25°C
q
q
q
q
q
q
q
60
60
75
45
0.2
3.5
100
5
5
I
ADJ
∆I
ADJ
Adjust Pin Current
Adjust Pin Current Change
Minimum Load Current
I
SC
Current Limit
5
6
8
12
1
2
2
UU
U
U
U
W
W W
U
W
(Note 1)
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ORDER
PART NUMBER
LM338P
MIN
1.19
LM138
TYP
1.24
0.005
0.02
5
0.1
20
0.3
0.002
60
75
45
0.2
3.5
MAX
1.29
0.01
0.04
15
0.3
30
0.6
0.01
UNITS
V
V
%/V
%/V
mV
%
mV
%
%/W
dB
dB
60
100
5
5
µA
µA
mA
A
A
A
5
6
8
12
1
LINER [ LINEAR TECHNOLOGY ]
