Electrical Characteristics (Continued)
Typicals and limits appearing in normal type apply for TJ = 25˚C. Limits appearing in Boldface type apply over the entire junc-
tion temperature range for operation.
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Symbol
Parameter
Current Limit
Conditions
Units
ILIMIT
LM1084-ADJ
VIN−VOUT = 5V
VIN−VOUT = 25V
LM1084-3.3
VIN = 8V
5.5
0.3
8.0
0.6
A
A
5.5
5.5
5.5
8.0
8.0
8.0
5
A
A
LM1084-5.0
VIN = 10V
LM1084-12
VIN = 17V
A
Minimum Load
LM1084-ADJ
VIN −VOUT = 25V
LM1084-3.3
VIN = 18V
Current (Note 10)
Quiescent Current
10.0
10.0
10.0
mA
mA
mA
5.0
5.0
LM1084-5.0
VIN ≤ 20V
LM1084-12
VIN ≤ 25V
5.0
10.0
mA
Thermal Regulation TA = 25˚C, 30ms Pulse
0.003
0.015
%/W
Ripple Rejection
fRIPPLE = 120Hz, = COUT = 25µF Tantalum,
IOUT = 5A
LM1084-ADJ, CADJ, = 25µF, (VIN−VO) = 3V
LM1084-3.3, VIN = 6.3V
LM1084-5.0, VIN = 8V
LM1084-12 VIN = 15V
LM1084
60
60
60
54
75
72
68
60
55
0.2
dB
dB
dB
dB
µA
µA
Adjust Pin Current
Adjust Pin Current
Change
120
5
10mA ≤ IOUT ≤ IFULL LOAD
,
1.5V ≤ VIN−VOUT ≤ 25V
Temperature
Stability
0.5
%
Long Term Stability TA =125˚C, 1000Hrs
RMS Output Noise 10Hz ≤ f≤ 10kHz
(% of VOUT
Thermal Resistance 3-Lead TO-263: Control Section/Output Section
Junction-to-Case 3-Lead TO-220: Control Section/Output Section
0.3
1.0
%
%
0.003
)
0.65/2.7
0.65/2.7
˚C/W
˚C/W
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.
Note 2: Power dissipation is kept in a safe range by current limiting circuitry. Refer to Overload Recovery in Application Notes.
Note 3: The maximum power dissipation is a function of T
, θ , and T . The maximum allowable power dissipation at any ambient temperature
JA A
J(max)
is P = (T
–T )/θ . All numbers apply for packages soldered directly into a PC board. Refer to Thermal Considerations in the Application Notes.
D
J(max)
A JA
Note 4: For testing purposes, ESD was applied using human body model, 1.5kΩ in series with 100pF.
Note 5: Typical Values represent the most likely parametric norm.
Note 6: All limits are guaranteed by testing or statistical analysis.
Note 7: I
is defined in the current limit curves. The I
Curve defines the current limit as a function of input-to-output voltage. Note that 30W power
FULLLOAD
FULLLOAD
dissipation for the LM1084 is only achievable over a limited range of input-to-output voltage.
Note 8: Load and line regulation are measured at constant junction temperature, and are guaranteed up to the maximum power dissipation of 30W. Power
dissipation is determined by the input/output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output
range.
Note 9: Dropout voltage is specified over the full output current range of the device.
Note 10: The minimum output current required to maintain regulation.
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