5A LOW DROPOUT LINEAR REGULATOR
FSP1084
FEATURES
Low Dropout Voltage: 1.3V Typically at 5A
Current Limiting and Thermal Protection
Output Current: 5A
Current Limit: 6.5A
Operating Junction Temperature Range: 0 to 125℃
Line Regulation: 0.015%(Typical)
Load Regulation: 0.2%(Typical)
GENERAL DESCRIPTION
The FSP1084 is a series of low dropout positive
voltage regulators with a maximum dropout of 1.5V at
5A of load current.
The series features on-chip thermal limiting which
provides protection against any combination of
overload and ambient temperatures that would create
excessive junction temperatures. It also includes a
trimmed bandgap reference and a current limiting
circuit.
The FSP1084 is available in 1.5V, 1.8V, 2.5V, 3.3V and
5.0V versions. The fixed versions integrate the adjust
resistors. It is also available in an adjustable version
which can set output voltage with two external
resistors.
The FSP1084 series is available in standard package
of TO263-2L, TO220-3L and TO252-2L.
APPLICATIONS
High Efficiency Linear Regulators
Battery Chargers
Post Regulation for Switching Supply
Microprocessor Supply
Desktop PCs, RISC and Embedded Processors’
Supply
PIN CONFIGURATION
(1) TO220-3L
3
2
1
Metal Tab V
OUT
V
IN
V
OUT
ADJ/GND
(2) TO252-2L
3
2
1
Metal Tab V
OUT
V
OUT
ADJ/GND
V
IN
(3) TO263-2L
3
2
1
Metal Tab V
OUT
V
IN
V
OUT
(TAB)
ADJ/GND
BLOCK DIAGRAM
3 INPUT
A1
B
A2
For Adjustable Output, disconnect A1 and A2, connect B
For Fixed Output,connect A1 and A2, disconnect B
1 ADJ/GND
1/9
-
+
Thermal
Protection
2 OUTPUT
2007-4-6
5A LOW DROPOUT LINEAR REGULATOR
FSP1084
ABSOLUTE MAXIMUM RATINGS (NOTE 1)
Symbol
Parameter
Rating
Unit
T
J
Maximum Junction Temperature
150
℃
T
S
Storage Temperature Range
-65~150
℃
T
LEAD
Lead Temperature (10 sec.)
300
℃
ESD
ESD (Human Body Model)
2000
V
Note 1: Stresses greater than those listed under“Absolute Maximum Ratings” may cause permanent damage to the
device. These are stress rating only, and functional operation of the device at these or any other conditions beyond
those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum
Ratings” for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
IN
T
J
Parameter
Input Voltage
Operating Junction Temperature Range
Rating
12
0~125
Unit
V
℃
ELECTRICAL CHARACTERISTICS
Typicals and limits appearing in normal type apply for T
J
=25℃. Limiting appearing in
Boldface
type apply over the
entire operating junction temperature range.
Parameter
Reference
Voltage
Symbol
V
REF
FSP1084-ADJ
FSP1084-1.5
FSP1084-1.8
Output Voltage
V
OUT
FSP1084-2.5
FSP1084-3.3
FSP1084-5.0
Reg
LINE
FSP1084-ADJ
FSP1084-1.5
FSP1084-1.8
Line Regulation
ΔV
OUT
FSP1084-2.5
FSP1084-3.3
FSP1084-5.0
I
O
=10mA,4.1V≤V
IN
≤10V
I
O
=10mA,4.9V≤V
IN
≤10V
I
O
=10mA,6.6V≤V
IN
≤10V
Test Condition
I
O
=10mA, V
IN
-V
OUT
=3V
I
O
=10mA~5A,1.5V≤V
IN
-V
OUT
≤5V
I
O
=0mA, V
IN
=4.5V
I
O
=10mA~5A, 3.1V≤V
IN
≤6V
I
O
=0mA, V
IN
=4.8V
I
O
=10mA~5A, 3.4V≤V
IN
≤6V
I
O
=0mA, V
IN
=5.5V
I
O
=10mA~5A, 4.1V≤V
IN
≤7V
I
O
=0mA, V
IN
=6.3V
I
O
=10mA~5A, 4.9V≤V
IN
≤8V
I
O
=0mA, V
IN
=8V
I
O
=10mA~5A, 6.6V≤V
IN
≤10V
I
O
=10mA,2.85V≤V
IN
≤10V
I
O
=10mA,3.1V≤V
IN
≤10V
I
O
=10mA,3.4V≤V
IN
≤10V
Min.
1.238
1.225
1.485
1.470
1.782
1.764
2.475
2.450
3.267
3.234
4.950
4.900
Typ.
1.250
1.250
1.5
1.5
1.8
1.8
2.5
2.5
3.3
3.3
5.0
5.0
0.015
0.035
0.5
1
0.5
1
0.5
1
0.5
1
0.5
1
Max.
1.262
1.270
1.515
1.530
1.818
1.836
2.525
2.550
3.333
3.366
5.050
5.100
0.2
0.2
6
6
6
6
6
6
6
6
10
10
Unit
V
V
V
V
V
V
%
mV
mV
2/9
2007-4-6
5A LOW DROPOUT LINEAR REGULATOR
FSP1084
ELECTRICAL CHARACTERISTICS (CONTINUED)
Typicals and limits appearing in normal type apply for T
J
=25℃. Limiting appearing in
Boldface
type apply over the
entire operating junction temperature range.
Parameter
Symbol
Reg
Load
Load Regulation
ΔV
OUT
Dropout Voltage
Current Limit
Adjust Pin
Current
Adjust Pin
Current Change
Minimum Load
Current
Quiescent
Current
Ripple Rejection
Temperature
Stability
Long-term
Stability
RMS Noise
(% of V
OUT
)
Thermal
Resistance,
Junction to case
FSP1084-ADJ
FSP1084-1.5/
1.8/2.5/3.3
FSP1084-5.0
I
LIMIT
Test Condition
I
O
=0mA~5A, V
IN
-V
OUT
=3V
I
O
=0mA~5A, V
IN
-V
OUT
=3V
I
O
=0mA~5A, V
IN
-V
OUT
=3V
5.5
Min.
Typ.
0.1
0.2
3
7
5
10
1.3
6.5
55
0.2
3
5
60
72
0.5
0.5
0.003
4
3
3
Max.
0.3
0.4
15
20
20
35
1.5
120
5
10
10
Unit
%
mV
mV
V
A
µA
µA
mA
mA
dB
%
%
%
℃/W
I
O
=5A,
ΔV
REF,
ΔV
OUT
=1%
V
IN
-V
OUT
=3V
I
O
=10mA, V
IN
=4.25V
I
O
=10mA~5A, 1.5V≤V
IN
-V
OUT
≤4.5V
V
IN
=10V (FSP1084-ADJ)
V
IN
=10V (FSP1084)
f=120Hz,C
OUT
=25uF Tantalum,
V
IN
-V
OUT
=3V, I
OUT
=5A
I
O
=10mA, V
IN
-V
OUT
=1.5V
T
A
=125℃, 1000hrs
10Hz≤f≤10kHz
θ
JC
TO252-2L
TO220-3L
TO263-2L
TYPICAL APPLICATIONS
FSP1084-ADJ
Vin
10µF
Tantalum
+
Vin
ADJ
Vout
R1
+
Vout
22µF
Tantalum
R2
Vout=Vref*(1+R2/R1)+Iadj*R2
Vin
10µF
Tantalum
+
FSP1084-5.0
Vin
GND
Vout
+
Vout
22µF
Tantalum
3/9
2007-4-6
5A LOW DROPOUT LINEAR REGULATOR
FSP1084
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)
Dropout Voltage vs Output Current
2.53
2.52
Output Voltage (V)
2.51
2.50
2.49
2.48
2.47
0
Output Voltage vs Temperature
Dropout Voltage (V)
25
50
75
T
J
(℃)
100
125
0.0
Line Regulation (mV)
-0.2
-0.4
-0.6
-0.8
-0.1
0
Line Regulation vs Temperature
Adjust Pin Current (
µ
A)
25
50
75
T
J
(℃)
100
125
80
75
70
65
60
55
50
45
40
35
30
25
20
Adjust Pin Current vs Output Current
0
1
2
3
4
Output Current (A)
5
4/9
2007-4-6
5A LOW DROPOUT LINEAR REGULATOR
FSP1084
TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED)
Dropout Voltage vs Temperature
Short Circuit Current (A)
1.40
Dropout Voltage (V)
1.35
1.30
1.25
1.20
0
8
7
6
5
4
3
2
1
0
Short Circuit Current vs Dropout Voltage
25
50
75
T
J
(℃)
100
125
0
2
4
6
8
Dropout Voltage (V)
10
12
Load Transient Response
Line Transient Response
Vin=5.5V, Vout=2.5V Io=100mA to 5A Cin=Cout=10µ(tan)
Vin=4.5V to 6.5V Vout=2.5V Io=200mA Cin=1µ(tan) Cout=10µ(tan)
5/9
2007-4-6
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