APL1085
3A 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 : 1.2V Typ. at I
OUT
=3A
Trimmed Current Limit : 3A Typ. at T
J
=125
°C
On-Chip Thermal Limiting : 150
°C
Typ.
Standard 3-pin TO-220 , TO-252 and TO-263
Power Package
General Description
The APL1085 is a low dropout three-terminal adjust-
able regulator with 3A output current capability. In
order to obtain lower dropout voltage and faster tran-
sient response, which is critical for low voltage
applications, the APL1085 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 specified output
current and controlled short-circuit current. On-chip
thermal limiting provides protection against any com-
bination of overload that would create excessive junc-
tion temperatures.
The APL1085 is available in both the through-hole
and surface mount versions of the industry standard
Applications
•
•
•
•
•
Pentium
TM
Processor Supplies
PowerPC
TM
Supplies
Low Voltage Logic Supplies
Battery-Powered Circuitry
Post Regulator for Switching Power Supply
Pin Description
3
TAB is V
OUT
V
IN
V
OUT
ADJ
2
1
Front View APL1085 TO-220 Package
3
V
IN
V
OUT
AD J
TA B is V
OU T
2
1
Front View APL1085 TO-252 Package
3
TA B is V
OU T
V
IN
V
OUT
AD J
2
1
Front View APL1085 TO-263 Package
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.5 - Jun., 2003
1
www.anpec.com.tw
APL1085
Ordering Information
APL1085 -
L e a d F re e C o d e
H a n d li n g C o d e
Tem p. R ange
Package C ode
V o lt a g e C o d e
Package C ode
F : T O -2 2 0
U : T O -2 5 2
Tem p. R ange
C : 0 t o 7 0
°
C
H a n d li n g C o d e
TU : Tube
V o lt a g e C o d e :
3 3 : 3 .3 V
L e a d F re e C o d e
L : L e a d F r e e D e v ic e
33
AP L1085
XXXXX
G : T O -2 6 3
TR : Tape & Reel
B la n k : A d ju s t a b l e V e r s io n
B l a n k : O r ig i n a l D e v ic e
AP L1085:
AP L1085
XXXXX
XXXXX
- D a te C o d e
A P L 1 0 8 5 -3 3 :
XXXXX
- D a te C o d e
Absolute Maximum Ratings
Symbol
V
I
T
J
Parameter
Input Voltage
Operating Junction Temperature Range
Control Section
Power Transistor
Storage Temperature Range
Lead Temperature (Soldering, 10 second)
Rating
7
0 to 125
0 to 150
-65 to +150
260
Unit
V
°C
T
STG
T
L
°C
°C
Electrical Characteristics
Symbol
V
REF
V
OUT
REG
LINE
Parameter
Test Conditions
APL1085
Unit
Min.
Typ.
Max.
1.225(-2%) 1.250 1.275(+2%) V
V
%
REG
LOAD
V
D
I
LIMIT
I
ADJ
Reference Voltage 1.5V≤(V
IN
-V
OUT
)
≤5.75V,
10mA≤ I
OUT
≤3A,
T
J
=0~125°C
Output Voltage
10mA≤ I
OUT
≤
3A, 4.75V≤V
IN
≤7V,
3.235(-2%) 3.300 3.365(+2%)
APL1085-3.3 T
J
=0~125°C
0.03
0.2
Line Regulation
T
J
=0~125°C, (Notes 1)
APL1085 2.75V≤V
IN
≤7V,
I
OUT
=
10mA,
APL1085-3.3 4.75V≤V
IN
≤7V,
I
OUT
=
0mA ,
Load Regulation
T
J
=25°C, (Notes 1)
APL1085 (V
IN
-V
OUT
)
=3V, 10mA≤ I
OUT
≤
3A
0.05
0.3
APL1085-3.3 V
I N
=5V, 0mA≤ I
OUT
≤
3A
0.05
0.5
Dropout Voltage
1.3
1.4
∆V
REF
=1% ,I
OUT
=3A ,T
J
=0~125°C
Current Limit
4.5
6.0
(V
IN
-V
OUT
)
=1.7V,
T
J
=25°C
3.5
5.0
T
J
=125°C
5.0
6.5
T
J
=25°C
(V
IN
-V
OUT
)
=3V,
4.0
5.5
T
J
=125°C
60
120
Adjust Pin Current (V
IN
-V
OUT
)
=3V, I
OUT
=10mA,
T
J
=0∼125°C
2
%
V
A
µA
Copyright
ANPEC Electronics Corp.
Rev. B.5 - Jun, 2003
www.anpec.com.tw
APL1085
Electrical Characteristics Cont.
Symbol
∆I
ADJ
Parameter
Test Conditions
Min.
Adjust Pin Current 1.5V≤( V
IN
-V
OUT
)≤5.75V,
Change APL1085 10mA≤ I
OUT
≤
3A
I
LMIN
Minimum Load
1.5V≤( V
IN
-V
OUT
)≤5.75V,
Current APL1085 T
J
=0∼125°C
I
Q
Quiescent Current V
I N
=5V
APL1085-3.3
PSRR Ripple Rejection
F=120Hz, C
out
=22µF, Tant. ,
(V
IN
-V
OUT
)=3V, I
OUT
=3A
L
S
Long -Term
T
J
=125°C,1000Hrs.
Stability
V
N
RMS Output
T
J
=25°C,10Hz?
F? 10kHz
Noise(% of V
OUT
)
Control Circuitry/Power
Thermal
θ
JC
Transistor
Resistance
Junction to Case
APL1085
Typ.
0.2
2
8
60
0.03
0.003
0.7/3.0
1.0
Unit
Max.
5
10
13
µA
mA
mA
dB
%
%
°C/
W
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.
Application Circuits
Typical Regulator
V
IN
(2.75V~7V)
APL1085
10µ
F +
C
1
+
V
OUT
(1.250V/ 3A)
Solid Tantalum
C
2*
5V to 3.3V Regulator
V
IN
(5V)
10µ
F
C
1
APL1085
+
R1
+
V
OUT
(3.3V/ 3A)
Solid Tantalum
C
2*
R2
*Required for stability
APL
1085
:C
2
=10µF
* R1 is typically in range of 100Ω to 120Ω
R1/(R1+R2)=1.250V/3.3V
Copyright
ANPEC Electronics Corp.
Rev. B.5 - Jun, 2003
3
www.anpec.com.tw
APL1085
Typical Characteristics
Dropout Voltage vs Output Current
1.5
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0
0.5
1
1.5
2
2.5
3
Short-Circuit Current vs Temperature
14
Shout- Circuit Current (A)
1.4
13
12
11
10
9
8
7
6
5
4
-50
V
IN
-V
OUT (SHORT CIRCUIT)
=5V
Dropout Voltage (V)
T
J
= -50°C
T
J
= 25°C
T
J
=0°C
T
J
=125°C
V
IN
-V
OUT(SHORT CIRCUIT)
=3.3V
0
50
100
150
Output Current (A)
Temperature (°C)
Load Regulation vs Temperature
0.10
∆
I =3A
Reference Voltage vs Temperature
1.275
1.270
1.265
Output Voltage Deviation (%)
0.05
Reference Voltage (V)
0.0
-0.05
-0.10
-0.15
-0.20
-50
0
50
100
150
1.260
1.255
1.250
1.245
1.240
1.235
1.230
1.225
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Copyright
ANPEC Electronics Corp.
Rev. B.5 - Jun, 2003
4
www.anpec.com.tw
APL1085
Typical Characteristics (Cont.)
Minimum Load Current vs Temperature
5
100
90
Adjust Pin Current vs Temperature
Minimum Load Current (mA)
Adjust Pin Current (µA)
4
3
2
1
0
-50
80
70
60
50
40
30
20
10
0
-50
0
50
100
150
0
50
100
150
Temperature (°C)
Temperature (°C)
Ripple Rejection vs Frequency
90
80
70
60
20
18
16
14
12
Maximum Power Dissipation*
Ripple Rejection (dB)
40
30
20
10
0
V
IN
-V
OUT
= 3V
V
RIPPLE(p-p)
= 1V
I
OUT
= 3A
100
1k
10k
100k
Power (W)
50
10
8
6
4
2
0
50
70
90
110
130
150
10
Frequency (Hz)
Case Temperature (°C)
* as Limited by Maximum Jcnction Temperature
Copyright
ANPEC Electronics Corp.
Rev. B.5 - Jun, 2003
5
www.anpec.com.tw
Analog electronics
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