LT1085 3.0A LOW DROPOUT POSITIVE REGULATOR
TO-3P
Features:
Output Current -
3A
Maximum Input Voltage – 12V
Adjustable Output Voltage or Fixed
1.5V, 1.8V, 2.5V, 2.85V, 3.3V, 3.6V, 5V
Current Limiting and Thermal Protection
Standard 3-Pin Power Packages
1 2 3
PIN 3: Vin
PIN 1: GND
PIN 2: Vout
Applications:
Post Regulator for Switching DC/DC Converter
High Efficiency Liner Regulators
Battery Charger
TO-220
Operating Ratings:
Junction Temperature Range: -10°C to 125°C
Pin1:
Gnd
Pin2:Vout
Pin3:
Vin
Ordering Information:
Parameter Number
LT1085
LT1085T
LT1085D
TO-3P
TO-220
TO-252
Package
Block Diagram
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
Ripple rejection
Line
Regu
Reference Voltage
Io=10mA, Tj=25C, (Vin-Vout)=1.5V 1.225
F=120Hz, Cout=25uF, Tantalum, Io=3A, Vin=Vout+3A
1.250
1.275
V
60
70
dB
LT1085-xxx
LT1085-Adj
LT1085-1.5
Load Regu
Output
Regu
I
O
=1
0mA,Vout+1.5V<Vin<12V,Tj=25C
Vin=3.3, 0mA<Io<3A. Tj=25C
Note 1, 2
Vin=3.0V, 0mA<Io<3A. Tj=25C
Note 1, 2
-
-
-
-
1.500
12
1.800
15
2.500
20
3.3
26
5.0
40
0.2
1.0
1.530
15
1.836
18
2.55
25
3.365
33
5.10
50
1.4
-
10.0
-
0.04
-
-
%
V
mV
V
mV
V
mV
V
mV
V
mV
V
A
mA
%
%/W
C/W
I
O
=10mA,Tj=25C,
3V<Vin<12V
1.470
Load Regu
Output
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
I
O
=10mA,Tj=25C,
4V<Vin<12V
2.450
Vin=4.0V, 0mA<Io<3A. Tj=25C
Note 1, 2
I
O
=10mA,Tj=25C,
4.8V<Vin<12V
3.235
Vin=5.0V, 0mA<Io<3A. Tj=25C
Note 1, 2
I
O
=10mA,Tj=25C,
6.5V<Vin<12V
4.9
Vin=8.0V, 0mA<Io<3A. Tj=25C
Note 1, 2
Io=3.0A(
Vout=1% Vout)
-
3.1
-
-
-
-
Vin-Vout=5V
0C<Tj<125C
Io=10mA
Ta=25C,
30ms pulse
Load Regu
Output
Regu
Load Regu
Output
Regu
LT1085-2.5
LT1085-3.3
Load Regu
Output
Regu
LT1085-5.0
Load Regu
Dropout Voltage
V
Current Limite
Mini Load Current
Temperature Stability
Thermal
Regulation
T
hermal Resisity Junction-Amient
T
hermal Resisity Junction-Case
1.3
-
5.0
0.5
0.008
98
15
ThjA
ThjC
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
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
