Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Maximum Input to Output Voltage Differential
LM1085-ADJ 29V
LM1085-12 18V
LM1085-3.3 27V
LM1085-5.0 25V
Power Dissipation (Note 2) Internally Limited
Junction Temperature (T
J
)(Note 3) 150˚C
Storage Temperature Range -65˚C to 150˚C
Lead Temperature 260˚C, to 10 sec
ESD Tolerance (Note 4) 2000V
Operating Ratings (Note 1)
Junction Temperature Range (T
J
) (Note 3)
Control Section −40˚C to 125˚C
Output Section −40˚C to 150˚C
Electrical Characteristics
Typicals and limits appearing in normal type apply for T
J
= 25˚C. Limits appearing in Boldface type apply over the entire junc-
tion temperature range for operation.
Symbol Parameter Conditions
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
V
REF
Reference Voltage LM1085-ADJ
I
OUT
= 10mA, V
IN
−V
OUT
=3V
10mA ≤I
OUT
≤ I
FULL LOAD
,1.5V ≤ (V
IN
−V
OUT
) ≤ 15V
(Note 7)
1.238
1.225
1.250
1.250
1.262
1.270
V
V
V
OUT
Output Voltage
(Note 7)
LM1085-3.3
I
OUT
= 0mA, V
IN
=5V
0 ≤ I
OUT
≤I
FULL LOAD
, 4.8V≤ V
IN
≤15V
3.270
3.235
3.300
3.300
3.330
3.365
V
V
LM1085-5.0
I
OUT
= 0mA, V
IN
=8V
0 ≤ I
OUT
≤ I
FULL LOAD
, 6.5V ≤ V
IN
≤ 20V
4.950
4.900
5.000
5.000
5.050
5.100
V
V
LM1085-12
I
OUT
= 0mA, V
IN
= 15V
0 ≤ I
OUT
≤ I
FULL LOAD
, 13.5V ≤ V
IN
≤ 25V
11.880
11.760
12.000
12.000
12.120
12.240
V
V
∆V
OUT
Line Regulation
(Note 8)
LM1085-ADJ
I
OUT
=10mA, 1.5V≤ (V
IN
-V
OUT
) ≤ 15V
0.015
0.035
0.2
0.2
%
%
LM1085-3.3
I
OUT
= 0mA, 4.8V ≤ V
IN
≤ 15V
0.5
1.0
6
6
mV
mV
LM1085-5.0
I
OUT
= 0mA, 6.5V ≤ V
IN
≤ 20V
0.5
1.0
10
10
mV
mV
LM1085-12
I
OUT
=0mA, 13.5V ≤ V
IN
≤ 25V
1.0
2.0
25
25
mV
mV
∆V
OUT
Load Regulation
(Note 8)
LM1085-ADJ
(V
IN
-V
OUT
) = 3V, 10mA ≤ I
OUT
≤ I
FULL LOAD
0.1
0.2
0.3
0.4
%
%
LM1085-3.3
V
IN
= 5V, 0 ≤ I
OUT
≤ I
FULL LOAD
3
7
15
20
mV
mV
LM1085-5.0
V
IN
= 8V, 0 ≤ I
OUT
≤ I
FULL LOAD
5
10
20
35
mV
mV
LM1085-12
V
IN
= 15V, 0 ≤ I
OUT
≤ I
FULL LOAD
12
24
36
72
mV
mV
Dropout Voltage
(Note 9)
LM1085-ADJ, 3.3, 5, 12
∆V
REF
, ∆V
OUT
= 1%, I
OUT
=3A 1.3 1.5 V
LM1085
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