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LR1084 Schematic ( PDF Datasheet ) - LRC

Teilenummer LR1084
Beschreibung Low dropout positive voltage regulators
Hersteller LRC
Logo LRC Logo 




Gesamt 11 Seiten
LR1084 Datasheet, Funktion
LESHAN RADIO COMPANY, LTD.
LR1084
General Description
Features
The LR1084 is a series of low dropout positive voltage g Low Dropout Voltage: 1.3V Typically at 5A
regulators with a maximum dropout of 1.5V at 5A of g Current Limiting and Thermal Protection
load current.
g Output Current: 5A
The series features on-chip thermal limiting which pro- g Current Limit: 6.5A
vides protection against any combination of overload g Operating Junction Temperature Range: 0 to
and ambient temperatures that would create excessive
125oC
junction temperatures. It also includes a trimmed band- g Line Regulation: 0.015% (Typical)
gap reference and a current limiting circuit.
g Load Regulation: 0.2% (Typical)
The LR1084 is available in 1.5V, 1.8V, 2.5V, 2.85V,
3.3V and 5.0Vversions. The fixed versions integrate
the adjust resistors. It is also available in an adjustable
version which can set the output voltage with two
external resistors.
The LR1084 series is available in standard packages of
TO-263-2L, TO-263-3L, TO-220 and TO-252.
Applications
g High Efficiency Linear Regulators
g Battery Chargers
g Post Regulation for Switching Supply
g Microprocessor Supply
g Desktop PCs, RISC and Embedded Processors'
Supply
TO-263-3L
TO-263-2L
TO-252
Figure 1. Package Types of LR1084
TO-220
1/11






LR1084 Datasheet, Funktion
Typical Performance Characteristics
1.50
1.45
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
Output Current(A)
Figure 3. Dropout Voltage vs. Output Current
LESHAN RADIO COMPANY, LTD.
LR1084
2.53
2.52
2.51
2.50
2.49
2.48
2.47
0
25 50 75 100 125
T (oC)
J
Figure 4. Output Voltage vs. Temperature
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
0
25 50 75 100 125
T (oC)
J
Figure 5. Line Regulation vs. Temperature
80
75
70
65
60
55
50
45
40
35
30
25
20
0
1234
Io(A)
ADJUST PIN CURRENT VS. OUTPUT CURRENT
5
Figure 6. Adjust Pin Current vs. Output Current
6/11

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