5A Low Dropout Voltage Regulator
Product Description
The GS1084L is a low drop voltage regulator able
to provide up to 5A output current. The dropout
voltage of the device is guaranteed at a maximum
1.5V at the maximum output current, decreasing
at lower loads.
The GS1084L is pin compatible with older
3-terminal adjustable regulators, but has better
performances in term of drop and output
tolerance.
Features
Three Terminal Adjustable or Fixed Output
Voltages 1.5V, 1.8V, 2.5V, 3.3V and 5V
Guaranteed Output Current up to 5A
Typical Dropout 1.3V (at 5A)
Output Tolerance: ±2% at 25ºC
Wind Operating Temperature Range: -40ºC
to 125ºC
Package Available: TO-220, TO-263,
TO-252, and SOT-223
Applications
Post Regulators for Switching Supply
Battery-Powered Circuitry
Low Voltage Logic Supplies
High efficiency linear regulators
Adjustable power supply
Block Diagram
www.gs-power.com
GS1084L
1
Packages & Pin Assignments
GS1084LT
(TO-220)
GS1084LM
(TO-263)
GS1084LD
(T0-252)
GS1084LX
(SOT-223)
TAB
GS1085LM-xxF
1
2
3
1
2
3
GND/ADJ
V
OUT
V
IN
1
2
3
GND/ADJ
V
OUT
V
IN
1
2
3
GND/ADJ
V
OUT
V
IN
1
2
3
GND/ADJ
V
OUT
V
IN
Ordering Information
TO-220
GS1084LT
GS1084LT15
GS1084LT18
GS1084LT25
GS1084LT33
GS1084LT50
TO-263
GS1084LM
GS1084LM15
GS1084LM18
GS1084LM25
GS1084LM33
GS1084LM50
TO-252
GS1084LD
GS1084LD15
GS1084LD18
GS1084LD25
GS1084LD33
GS1084LD50
SOT-223
GS1084LX
GS1084LX15
GS1084LX18
GS1084LX25
GS1084LX33
GS1084LX50
Output
ADJ
1.5V
1.8V
2.5V
3.3V
5.0V
Adjustable Version does not need Voltage Code.
Marking Information
GS1084L
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2
Absolute Maximum Ratings
Symbol
V
IN
Input Voltage
TO-220
θ
JC
Thermal Resistance (Junction to Case)
TO-263
TO-252
SOT-223
TO-220
θ
JA
Thermal Resistance (Junction to Ambient)
TO-263
TO-252
SOT-223
TO-220
P
D
Parameter
Maximum Ratings
15
3
3
5
8
62.5
62.5
104
138
2
2
1.2
0.9
-40 to 125
-65 to 150
300
Units
V
ºC/W
ºC/W
Internal Power Dissipation
TO-263
TO-252
SOT-223
W
T
J
T
STG
T
LEAD
Operating Junction Temperature
Storage Temperature Range
Lead Temperature ( Soldering 10sec)
ºC
ºC
ºC
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device
Typical Applications
Vin
IN
OUT
Vout
GS1084L
Cin
ADJ
Vref
1.25V
R1
Cout
EN
Iadj
50uA
R2
V
OUT
=V
REF
(1+R2/R1)+I
ADJ
R2
Figure1. Adjustable Voltage Regulator
Vin
IN
OUT
Vout
GS1084L-xx
Cin
10uF/Tantalum
GND
Cout
10uF/Tantalum
I
GND
Figure2. Fixed Voltage Regulator
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GS1084L
3
Electrical Characteristics
I
OUT
= 0 mA, and T
J
= +25°C, unless otherwise noted
Parameter
Reference
Voltage
(1)
Device
GS1084L
GS1084L- 1.5
GS1084L- 1.8
Conditions
Vin=2.75V , Io=10mA
Vin=2.7 to 7V ,
Io=10mA to 5A
Vin=4.0V
Vin=3.0V , Io= 0mA to 5A
Vin=4.3V
Vin=3.3V , Io= 0mA to 5A
Vin=5.0V
Vin=4.0V , Io= 0mA to 5A
Vin=5.8V
Vin=4.8V , Io= 0mA to 5A
Vin=7.5V
Vin=6.5V , Io= 0mA to 5A
I
O
=10mA
(Vo+1.5V)
≦
Vin
≦
7V
Vin=Vo+2.5V , Io=0mA to 5A
ΔV
OUT
,
ΔV
REF
= 1%,
I
OUT
= 5A
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
1.500
1.500
1.800
1.800
2.500
2.500
3.300
3.300
5.000
5.000
0.04
0.08
1.1
5.5
Max
1.263
1.275
1.515
1.530
1.818
1.836
2.525
2.550
3.333
3.366
5.050
5.100
0.2
0.4
1.3
Units
V
V
V
V
V
V
V
V
V
V
V
V
%
%
V
A
Output Voltage
GS1084L- 2.5
GS1084L- 3.3
GS1084L- 5.0
Line Regulation
(1)
Load
Regulation
(1)
Dropout Voltage
(V
IN
- V
OUT
)
(1),(3)
Current Limit
(1)
Quiescent
Current
Ripple
Rejection
(1)
Adjust Pin
Current
(1)
Temperature
Stability
Long Term
Stability
All
All
All
All
All
All
GS1084L
V
IN
=5V
f =120Hz , C
OUT
= 25μF
Tantalum, I
OUT
= 3A,
(V
IN
-V
OUT
) = 3V, C
ADJ
=25μF
60
5
75
50
0.5
10
mA
dB
120
μA
%
T
A
= 12.5°C, 1000Hrs
0.03
1
%
NOTE 1:
For GS1084L(adjustable) V
ADJ
=0V
NOTE 2:
For the adjustable device the minimum load current is the minimum current required to maintain
regulation. Normally the current in the resistor divider used to set the output voltage is selected to meet
the minimum load current requirement.
NOTE 3 :
The specification represent the minimum input/output voltage required to maintain 1% regulation.
www.gs-power.com
GS1084L
4
Typical Performance Characteristics
Dropt Voltage
Load Regulation
MINIMUM INPUT/OUTPUT
DEFFERENTIAL(V)
2
OUTPUT VOLTAGE DEVLATION(%)
0.10
0.05
0
-0.05
-0.10
-0.15
-0.20
-50 -25 0 25 50 75 100 125 150
TEMPERATURE(° C)
T
J
=25° C
1
T
J
=150° C
0
0
1
2
3
4
OUTPUT CURRENT(A)
Temperature Stability
Ripple Rejection
OUTPUT VOLTAGE CHANGE(%)
2.0
RIPPLE REJECTION (dB)
80
70
60
50
40
30
20
10
0
I
OUT
=I
FULL LOAD
(V
IN
-V
OUT
)
³
V
DROPOUT
(V
IN
-V
OUT
) 3V
3
V
RIPPLE
3V
P-P
V
RIPPLE
0.5V
P-P
1.0
0
-1.0
-2.0
-50 -25
0 25 50 75 100 125 150
TEMPERATURE(°C)
100
1k
10k
FREQUENCY (Hz)
100k
Ripple Rejection vs. Current
Short-Circuit Current
SHORT-CIRCUIT CURRENT (A)
RIPPLE REJECTION(dB)
3
2
1
0
4
6
0
2
8 10 12 14
INPUT/OUTPUT DIFFERENTIAL (V)
20
10
0
f
R
=20KHz
V
RIPPLE≤
0.5Vp-p
0
0.2 0.4 0.6 0.8 1.0
OUTPUT CURRENT (0 TO I
FULLLOAD
)
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GS1084L
5
100
90
80
70
60
50
40
30
6
5
4
f
R
=120Hz
V
RIPPLE≤
3Vp-p
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