APL1084
5A Low Dropout Fast Response Positive Adjustable Regulator and Fixed 3.3V
Features
!
!
!
!
!
!
!
!
Fast Transient Response
Guaranteed Dropout Voltage at Multiple Cur-
rents
Load Regulation :0.05% Typ.
Line Regulation : 0.03% Typ.
Low Dropout Voltage: 1.3V Typ. at I
OUT
=5A
Trimmed Current Limit : 5A Typ. at T
J
=125
°C
On-Chip Thermal Limiting : 150
°C
Typ.
Standard 3-pin TO-220, TO-252 and TO-263
Power Packages
applications, the APL1084 has been optimized. The
output available voltage range of adjustable version
is from 1.25~5.75V with an input supply below 7V,
and the fixed 3.3V output voltage device is also
available. Current limit is trimmed to ensure speci-
fied output current and controlled short-circuit current.
On-chip thermal limiting provides protection against
any combination of overload that would create ex-
cessive junction temperatures. The APL1084 is avail-
able in both the through-hole and surface mount ver-
sions of the industry standard 3-pin TO-220,TO-252
and TO-263 power packages.
Pin Description
Applications
!
V
IN
V
OUT
!
!
!
!
!
Pentium
TM
Processor Supplies
powerPC
TM
Supplies
Low Voltage Logic Supplies
Battery-Powered Circuitry
Post Regulator for Switching Power Supply
TAB is V
OUT
ADJ
Front View APL1084
TO-252 Package
3
6)*EI8
O UT
V
IN
V
OUT
ADJ
2
1
Front View APL1084
TO-263 Package
General Description
3
V
IN
V
OUT
ADJ
The APL1084 is a low dropout three-terminal adjust-
able regulator with 5A output current capability. In
order to obtain lower dropout voltage and faster tran-
sient response, which is critical for low voltage
6)*EI8
OUT
2
1
Front View APL1084
TO-220 Package
3
6)*EI8
OUT
V
IN
V
OUT
ADJ
2
1
Front View APL1084
TO-264 Package
Ordering Information
APL1084 -
L e a d F re e C o d e
H a n d lin g C o d e
Tem p. R ange
Package C ode
V o lta g e C o d e
Package C ode
F : T O -2 2 0
G : T O -2 6 3
U : T O -2 5 2
Z : T O -2 6 4
Tem p. R ange
C : 0 to 7 0
°
C
H a n d lin g C o d e
TU : Tube
TR : Tape & R eel
V o lta g e C o d e :
3 3 : 3 .3 V
B la n k : A d ju s ta b le V e rs io n
L e a d F re e C o d e
L : L e a d F re e D e v ic e
B la n k : O rg in a l D e v ic e
AP L1084- 33 :
33
AP L1084
XXXXX
XXXXX
- D a te C o d e
AP L1084 :
AP L1084
XXXXX
XXXXX
- D a te C o d e
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Copyright
ANPEC Electronics Corp.
Rev. B.9 - Aug., 2003
1
www.anpec.com.tw
APL1084
Absolute Maximum Ratings
Symbol
V
I
T
J
T
STG
T
L
Input Voltage
Operating Junction Temperature Range
Control Section
Power Transistor
Storage Temperature Range
Lead Temperature (Soldering, 10 second)
Parameter
Rating
7
0 to 125
0 to 150
-65 to +150
260
Unit
V
°C
°C
°C
Electrical Characteristics
Symbol
V
REF
V
OUT
REG
LINE
Parameter
Test Conditions
APL1084
Unit
Min.
Typ.
Max.
1.225(-2%) 1.250 1.275(+2%) V
3.235(-2%) 3.300 3.365(+2%)
0.03
0.2
V
%
REG
LOAD
V
D
I
LIMIT
Reference Voltage 1.5V≤(V
IN
-V
OUT
)
≤5.75V,
APL1084 10mA≤ I
OUT
≤5A,
T
J
=0~125°C
Output Voltage
10mA≤ I
OUT
≤
5A, 4.75V≤V
IN
≤7V,
APL1084-3.3 T
J
=0~125°C
Line Regulation
T
J
=0~125°C, (Notes 1)
APL1084 2.75V≤V
IN
≤7V,
I
OUT
=
10mA,
APL1084-3.3 4.75V≤V
IN
≤7V,
I
OUT
=
0mA ,
Load Regulation
T
J
=25°C, (Notes 1)
APL1084 (V
IN
-V
OUT
)
=3V, 10mA≤ I
OUT
≤
5A
APL1084-3.3 V
I N
=5V, 0mA≤ I
OUT
≤
5A
Dropout Voltage
∆V
REF
=1% ,I
OUT
=3A ,T
J
=0~125°C
∆V
REF
=1% ,I
OUT
=5A ,T
J
=0~125°C
Current Limit
(V
IN
-V
OUT
)
=1.7V,
0.05
0.05
1.2
1.3
6.0
5.0
6.5
5.5
7.6
6.0
8.2
6.5
60
0.2
2
8
0.3
0.5
1.4
1.5
%
V
A
T
J
=25°C
T
J
=125°C
T
J
=25°C
(V
IN
-V
OUT
)
=3V,
T
J
=125°C
I
ADJ
Adjust Pin Current (V
IN
-V
OUT
)
=3V, I
OUT
=10mA,
APL1084 T
J
=0∼125°C
∆I
ADJ
Adjust Pin Current 1.5V≤( V
IN
-V
OUT
)
≤5.75V,
Change APL1084 10mA≤ I
OUT
≤5A
I
LMIN
Minimum Load
1.5V≤( V
IN
-V
OUT
)
≤5.75V,
Current APL1084 T
J
=0∼125°C
I
Q
Quiescent Current V
I N
=5V
APL1084-3.3
PSRR Ripple Rejection
APL1084 F=120Hz, C
out
=22µF, Tant. ,
(V
IN
-V
OUT
)
=3V, I
OUT
=5A
APL1084-3.3 F=120Hz, C
out
=22µF, Tant. ,
(V
IN
=6.3V, I
OUT
=5A
L
S
Long -Term
T
J
=125°C,1000Hrs.
Stability
Copyright
ANPEC Electronics Corp.
Rev. B.9 - Aug., 2003
2
120
5
10
13
µA
µA
mA
mA
60
dB
0.03
1.0
%
www.anpec.com.tw
APL1084
Electrical Characteristics (Cont.)
Symbol
V
N
θ
th,J-TAB
θ
th,J-AMB
Parameter
Test Conditions
APL1084
Min.
Typ.
Max.
0.003
6.0
50
62.5
Unit
%
°C/
W
°C/
W
RMS Output Noise(% of T
J
=25°C,10Hz≤F≤10kHz
V
OUT
)
Thermal Resistance
(NOTE 2)
Junction-to-Case, at TAB
Thermal Resistance
TO-263
Junction-to-Ambient
TO-252
NOTE 1: See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulations are
measured at a constant junction temperature by low duty cycle pulse testing.
NOTE 2 :The value could be varied when heat sink size is different. Use larger heat sink or larger PCB size , which improves
θ
th
,TAB-A
, to improve overall thermal resistance (θ
th
,J-A
).
Application Circuits
Typical Regulator
V
IN
(2.75V~7V)
10µ
F +
C
1
APL1084
+
V
OUT
(1.250V/ 5A)
Solid Tantalum
C
2*
5V to 3.3V Regulator
V
IN
(5V)
10µ
F
C
1
+
APL1084
R1
R2
+
V
OUT
(3.3V/ 5A)
Solid Tantalum
C
2*
V
OUT
=(R1+R2)/R1*1.250V
* Required for stability
APL
1084
:C =10µF
* R1 is typically in range of 100Ω to 120Ω
Copyright
ANPEC Electronics Corp.
Rev. B.9 - Aug., 2003
3
www.anpec.com.tw
APL1084
Typical Characteristics
Dropout Voltage vs Output Current
1.5
1.3
Short- Circuit Current vs Temperature
16
T
J
= -50°C
Shout- Circuit Current (A)
1.4
15
14
13
12
11
10
9
8
7
6
-50
V
IN
-V
OUT(SHORT CIRCUIT)
=3.3V
V
IN
-V
OUT (SHORT CIRCUIT)
=5V
Dropout Voltage (V)
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0
1
2
3
4
5
T
J
= 25°C
T
J
=125°C
T
J
=0°C
0
50
100
150
Output Current (A)
Temperature (°C)
Load Regulation vs Temperature
0.10
∆
I =5A
1.275
1.270
1.265
1.260
1.255
1.250
1.245
1.240
1.235
1.230
Reference Voltage vs Temperature
Output Voltage Deviation (%)
0.05
0.0
-0.05
-0.10
-0.15
-0.20
-50
0
50
100
150
Reference Voltage (V)
1.225
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Copyright
ANPEC Electronics Corp.
Rev. B.9 - Aug., 2003
4
www.anpec.com.tw
APL1084
Typical Characteristics (Cont.)
Minimum Load Current vs Temperature
5
100
90
80
70
60
50
40
30
20
10
0
-50
0
50
100
150
0
-50
0
50
100
150
Adjust Pin Current vs Temperature
Minimum Load Current (mA)
4
3
2
1
Temperature (°C)
Adjust Pin Current (µA)
Temperature (°C)
Ripple Rejection vs Frequency
90
80
70
60
40
30
20
10
0
V
IN
-V
OUT
= 3V
V
RIPPLE(p-p)
= 1V
I
OUT
= 5A
100
1k
10k
100k
50
Maximum Power Dissipation*
!
#
Power (W)
Ripple Rejection (dB)
#
#
#
%
'
!
#
10
Frequency (Hz)
Case Temperature (°C)
* as Limited by Maximum Jcnction Temperature
Copyright
ANPEC Electronics Corp.
Rev. B.9 - Aug., 2003
5
www.anpec.com.tw
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