SNVS037F – SEPTEMBER 1999 – REVISED MARCH 2013
Electrical Characteristics
Typicals and limits appearing in normal type apply for T
J
= 25°C. Limits appearing in
Boldface
type apply over the entire
junction temperature range for operation.
Symbol
V
REF
Parameter
Reference Voltage
Conditions
LM1084-ADJ
I
OUT
= 10mA, V
IN
−V
OUT
= 3V
10mA
≤I
OUT
≤
I
FULL LOAD
,1.5V
≤
(V
IN
−V
OUT
)
≤
25V
LM1084-3.3
I
OUT
= 0mA, V
IN
= 8V
0
≤
I
OUT
≤I
FULL LOAD
, 4.8V≤ V
IN
≤15V
LM1084-5.0
I
OUT
= 0mA, V
IN
= 8V
0
≤
I
OUT
≤
I
FULL LOAD
, 6.5V
≤
V
IN
≤
20V
LM1084-12
I
OUT
= 0mA, V
IN
= 15V
0
≤
I
OUT
≤
I
FULL LOAD
, 13.5V
≤
V
IN
≤
25V
ΔV
OUT
Line Regulation
(4)
Min
(1)
Typ
(2)
Max
(1)
Units
V
V
V
V
V
V
V
V
%
%
mV
mV
mV
mV
mV
mV
%
%
mV
mV
mV
mV
mV
mV
V
A
A
A
A
A
(3)
1.238
1.225
3.270
3.235
4.950
4.900
11.880
11.760
1.250
1.250
3.300
3.300
5.000
5.000
12.000
12.000
0.015
0.035
0.5
1.0
0.5
1.0
1.0
2.0
0.1
0.2
3
7
5
10
12
24
1.3
1.262
1.270
3.330
3.365
5.050
5.100
12.120
12.240
0.2
0.2
6
6
10
10
25
25
0.3
0.4
15
20
20
35
36
72
1.5
V
OUT
Output Voltage
(3)
LM1084-ADJ
I
OUT
=10mA, 1.5V≤ (V
IN
-V
OUT
)
≤
15V
LM1084-3.3
I
OUT
= 0mA, 4.8V
≤
V
IN
≤
15V
LM1084-5.0
I
OUT
= 0mA, 6.5V
≤
V
IN
≤
20V
LM1084-12
I
OUT
=0mA, 13.5V
≤
V
IN
≤
25V
ΔV
OUT
Load Regulation
(4)
LM1084-ADJ
(V
IN
-V
OUT
) = 3V, 10mA
≤
I
OUT
≤
I
FULL LOAD
LM1084-3.3
V
IN
= 5V, 0
≤
I
OUT
≤
I
FULL LOAD
LM1084-5.0
V
IN
= 8V, 0
≤
I
OUT
≤
I
FULL LOAD
LM1084-12
V
IN
= 15V, 0
≤
I
OUT
≤
I
FULL LOAD
Dropout Voltage
I
LIMIT
Current Limit
(5)
LM1084-ADJ, 3.3, 5, 12
ΔV
REF
,
ΔV
OUT
= 1%, I
OUT
= 5A
LM1084-ADJ
V
IN
−V
OUT
= 5V
V
IN
−V
OUT
= 25V
LM1084-3.3
V
IN
= 8V
LM1084-5.0
V
IN
= 10V
LM1084-12
V
IN
= 17V
5.5
0.3
5.5
5.5
5.5
8.0
0.6
8.0
8.0
8.0
5
5.0
5.0
5.0
10.0
10.0
10.0
10.0
Minimum Load
Current
(6)
Quiescent Current
LM1084-ADJ
V
IN
−V
OUT
= 25V
LM1084-3.3
V
IN
= 18V
LM1084-5.0
V
IN
≤
20V
LM1084-12
V
IN
≤
25V
mA
mA
mA
mA
(1)
(2)
(3)
(4)
(5)
(6)
4
All limits are specified by testing or statistical analysis.
Typical Values represent the most likely parametric norm.
I
FULLLOAD
is defined in the current limit curves. The I
FULLLOAD
Curve defines the current limit as a function of input-to-output voltage.
Note that 30W power dissipation for the LM1084 is only achievable over a limited range of input-to-output voltage.
Load and line regulation are measured at constant junction temperature, and are ensured up to the maximum power dissipation of 30W.
Power dissipation is determined by the input/output differential and the output current. ensured maximum power dissipation will not be
available over the full input/output range.
Dropout voltage is specified over the full output current range of the device.
The minimum output current required to maintain regulation.
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