LT1085 Datasheet, PDF (3/5 Pages) First Components International – 3.0A LOW DROPOUT POSITIVE REGULATOR Adjustable Output Voltage or Fixed

LT1085 3.0A LOW DROPOUT POSITIVE REGULATOR
Electrical Characteristics:
Typicals and limits appearing in normal type apply for Tj=25 .
Limits appearing in Boldface type apply over the entire junction temperature range for operation
Symbol
Parameter
Conditions
Min
Typ
Max Units
Vref
Reference Voltage Io=10mA, Tj=25C, (Vin-Vout)=1.5V 1.225
Ripple rejection F=120Hz, Cout=25uF, Tantalum, Io=3A, Vin=Vout+3A
Line Regu
Load Regu
LT1085-xxx
LT1085-Adj
I_{O =10mA,Vout+1.5V<Vin<12V,Tj=25C -}
Vin=3.3, 0mA<Io<3A. Tj=25C
Note 1, 2
-
1.250
60
-
-
Output Regu
Load Regu
LT1085-1.5
I_O=10mA,Tj=25C, 3V<Vin<12V 1.470 1.500
Vin=3.0V, 0mA<Io<3A. Tj=25C
12
Note 1, 2
Output Regu
Load Regu
LT1085-1.8
I_O=10mA,Tj=25C,3.3V<Vin<12V 1.764
Vin=3.3V, 0mA<Io<3A. Tj=25C
Note 1, 2
1.800
15
Output Regu
Load Regu
LT1085-2.5
I_O=10mA,Tj=25C, 4V<Vin<12V 2.450 2.500
Vin=4.0V, 0mA<Io<3A. Tj=25C
20
Note 1, 2
1.275
70
0.2
1.0
1.530
15
1.836
18
2.55
25
V
dB
%
V
mV
V
mV
V
mV
Output Regu
LT1085-3.3
I_O=10mA,Tj=25C, 4.8V<Vin<12V ^{3.235 3.3}
3.365
V
Vin=5.0V, 0mA<Io<3A. Tj=25C
26
33
mV
Load Regu
Note 1, 2
Output Regu _LT1085-5.0
I_O=10mA,Tj=25C, 6.5V<Vin<12V ^4.9
5.0
Vin=8.0V, 0mA<Io<3A. Tj=25C
40
Load Regu
Note 1, 2
5.10
V
50
mV
Dropout Voltage Io=3.0A( Vout=1% Vout)
V
Current Limite
Vin-Vout=5V
Mini Load Current 0C<Tj<125C
Temperature Stability Io=10mA
-
1.3
3.1
-
5.0
-
0.5
1.4
V
-
A
10.0
mA
-
%
ThjA
ThjC
Thermal Regulation
Thermal Resisity Junction-Amient
Thermal Resisity Junction-Case
Ta=25C, 30ms pulse
-
0.008
0.04 %/W
-
98
-
C/W
-
15
-
Note1: See Thermal Regulation specifications for changes in output vol. due to heating effects. line and
load regulation are measured at a constant junction Temp. by low duty cycle pulse testing. Load
regulation ismeasured at the output lead=1/8" from the package
Note2: Line and load Regulation are guaranteed up to the max power dissipation of 15W power dissipation
is determined by the difference between input and output and the current. Guaranteed max power
dissipation will not be available over the full input/output range
Note3: Quiescent current is defined as the mini output current required in maintaining regulation. At 12V input
/output differential the device is quaranteed to regulate if the output current is greater than 10mA