Datasheet

LM1084
SNVS037F –SEPTEMBER 1999–REVISED MARCH 2013 www.ti.com
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.
Min Typ Max
Symbol Parameter Conditions Units
(1) (2) (1)
V
REF
Reference Voltage LM1084-ADJ
1.238 1.250 1.262 V
I
OUT
= 10mA, V
IN
−V
OUT
= 3V
1.225 1.250 1.270 V
10mA ≤I
OUT
≤ I
FULL LOAD
,1.5V ≤ (V
IN
−V
OUT
) ≤ 25V
(3)
V
OUT
Output Voltage LM1084-3.3
(3)
I
OUT
= 0mA, V
IN
= 8V 3.270 3.300 3.330 V
0 ≤ I
OUT
≤I
FULL LOAD
, 4.8V≤ V
IN
≤15V 3.235 3.300 3.365 V
LM1084-5.0
I
OUT
= 0mA, V
IN
= 8V 4.950 5.000 5.050 V
0 ≤ I
OUT
≤ I
FULL LOAD
, 6.5V ≤ V
IN
≤ 20V 4.900 5.000 5.100 V
LM1084-12
I
OUT
= 0mA, V
IN
= 15V 11.880 12.000 12.120 V
0 ≤ I
OUT
≤ I
FULL LOAD
, 13.5V ≤ V
IN
≤ 25V 11.760 12.000 12.240 V
ΔV
OUT
Line Regulation LM1084-ADJ 0.015 0.2 %
(4)
I
OUT
=10mA, 1.5V≤ (V
IN
-V
OUT
) ≤ 15V 0.035 0.2 %
LM1084-3.3 0.5 6 mV
I
OUT
= 0mA, 4.8V ≤ V
IN
≤ 15V 1.0 6 mV
LM1084-5.0 0.5 10 mV
I
OUT
= 0mA, 6.5V ≤ V
IN
≤ 20V 1.0 10 mV
LM1084-12 1.0 25 mV
I
OUT
=0mA, 13.5V ≤ V
IN
≤ 25V 2.0 25 mV
ΔV
OUT
Load Regulation LM1084-ADJ 0.1 0.3 %
(4)
(V
IN
-V
OUT
) = 3V, 10mA ≤ I
OUT
≤ I
FULL LOAD
0.2 0.4 %
LM1084-3.3 3 15 mV
V
IN
= 5V, 0 ≤ I
OUT
≤ I
FULL LOAD
7 20 mV
LM1084-5.0 5 20 mV
V
IN
= 8V, 0 ≤ I
OUT
≤ I
FULL LOAD
10 35 mV
LM1084-12 12 36 mV
V
IN
= 15V, 0 ≤ I
OUT
≤ I
FULL LOAD
24 72 mV
Dropout Voltage
(5)
LM1084-ADJ, 3.3, 5, 12
ΔV
REF
, ΔV
OUT
= 1%, I
OUT
= 5A 1.3 1.5 V
I
LIMIT
Current Limit LM1084-ADJ
V
IN
−V
OUT
= 5V 5.5 8.0 A
V
IN
−V
OUT
= 25V 0.3 0.6 A
LM1084-3.3
V
IN
= 8V 5.5 8.0 A
LM1084-5.0
V
IN
= 10V 5.5 8.0 A
LM1084-12
V
IN
= 17V 5.5 8.0 A
Minimum Load LM1084-ADJ
Current
(6)
V
IN
−V
OUT
= 25V 5 10.0 mA
Quiescent Current LM1084-3.3
V
IN
= 18V 5.0 10.0 mA
LM1084-5.0
V
IN
≤ 20V 5.0 10.0 mA
LM1084-12
V
IN
≤ 25V 5.0 10.0 mA
(1) All limits are specified by testing or statistical analysis.
(2) Typical Values represent the most likely parametric norm.
(3) 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.
(4) 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.
(5) Dropout voltage is specified over the full output current range of the device.
(6) The minimum output current required to maintain regulation.
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