Copyright
ANPEC Electronics Corp.
Rev. A.7 - Jun., 2003
APL1087
www.anpec.com.tw
1
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.
800mA Low Dropout Fast Response Positive Adjustable Regulator and Fixed
1.8V, 2.5V and 3.3V
•••••
Guaranteed Output Voltage Accuracy within 2%
•••••
Fast Transient Response
•••••
Guaranteed Dropout Voltage at Multiple Cur-
rents
•••••
Load Regulation : 0.6% Typ.
•••••
Line Regulation : 0.03% Typ.
•••••
Low Dropout Voltage : 1.3V Typ. at I
OUT
=500mA
•••••
Current Limit : 0.8A Min. at T
J
=125
°
C
•••••
On-Chip Thermal Limiting : 150
°
C Typ.
•••••
Adjustable Output : 1.25~7.15V
•••••
Standard 3-pin SOT-89, SOT-223, TO-92 and
TO- 252 Power Packages.
Features
General Description
The APL1087 is a low dropout three-terminal adjust-
able regulators with 0.8A output current capability.
In order to obtain lower dropout voltage and faster
transient response, which is critical for low voltage
applications , the APL1087 has been optimized.
The device is available in an adjustable version and
fixed output voltages of 1.8V, 2.5V and 3.3V, the out-
put available voltage range is from 1.25~7.15V with
an input supply below 9V. Dropout voltage is guaran-
teed at a maximum of 1.45V at 0.5A.
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 APL1087 is available in the industry standard 3-
pin SOT-89, SOT-223, TO-92 and TO-252 power
packages.
Pin Description
Applications
•••••
Voltage Regulator for CD-ROM Drivers
•••••
Voltage Regulator for LAN Cards
•••••
Voltage Regulator for mother Boards
•••••
Wireless Communication Systems
•••••
Portable Instrument
•••••
Portable Consumer Equipment
•••••
Low Voltage Systems
TO-252 (Top View)
V
OUT
1
2
3
IN
O UT
AD J/G ND
V
IN
V
OUT
ADJ/GND
3
2
1
TO-92 (Top View)
SOT-89 (Front View)
V
IN
V
O U T
AD J/G N D
2
1
3
AP L1087
V
O U T
SOT-223 (Front View)
V
IN
V
O U T
A D J /G N D
1
2
3
V
O U T
Copyright
ANPEC Electronics Corp.
Rev. A.7 - Jun., 2003
APL1087
www.anpec.com.tw
2
P a c k a g e C o d e
D : S O T -8 9 E : T O -9 2
U : T O -2 5 2 V : S O T -2 2 3
T e m p . R a n g e
C : 0 to 7 0 C
H a n d lin g C o d e
T U : T u b e T R : T a p e & R e e l
V o lta g e C o d e
1 8 : 1 .8 V 2 5 : 2 .5 V 3 3 : 3 .3 V
B la n k : A d ju s ta b le V e rs io n
°
A P L 1 0 8 7 -
H a n d lin g C o d e
T e m p . R a n g e
P a c k a g e C o d e
V o lta g e C o d e
A P L 1 0 8 7 -3 3 U :
A P L 1 0 8 7
X X X X X
- D a te C o d e
X X X X X
3 3
A P L 1 0 8 7 -2 5 U :
A P L 1 0 8 7
X X X X X
- D a te C o d e
X X X X X
2 5
A P L 1 0 8 7 -1 8 U :
A P L 1 0 8 7
X X X X X
- D a te C o d e
X X X X X
1 8
A P L 1 0 8 7 U :
A P L 1 0 8 7
X X X X X
- D a te C o d e
X X X X X
A P L 1 0 8 7
X X X X X
X X X X X - D a te C o d e
A P L 1 0 8 7 D /V /E :
A P L 1 0 8 7
X X X X X 2 5
X X X X X - D a te C o d e
A P L 1 0 8 7 -2 5 D /V /E :
A P L 1 0 8 7
X X X X X 3 3
X X X X X - D a te C o d e
A P L 1 0 8 7 -3 3 D /V /E :
A P L 1 0 8 7
X X X X X 1 8
X X X X X - D a te C o d e
A P L 1 0 8 7 -1 8 D /V /E :
Ordering and Marking Information
%
Symbol
Parameter
Rating
Unit
V
I
Input Voltage
9
V
T
J
Operating Junction Temperature Range
Control Section
Power Transistor
0 to 125
0 to 150
°
C
T
STG
Storage Temperature Range
-65 to +150
°
C
T
L
Lead Temperature (Soldering, 10 second)
260
°
C
θ
JA
Thermal Resistance from Junction to Ambient in Free Air
SOT-89
SOT-223
TO-92
TO-252
180
75
180
62.5
°
C/W
Absolute Maximum Ratings
Copyright
ANPEC Electronics Corp.
Rev. A.7 - Jun., 2003
APL1087
www.anpec.com.tw
3
APL1087
Symbol
Parameter
Test Conditions
Min. Typ. Max.
Unit
V
REF
Reference
Voltage
10mA
≤
I
OUT
≤
0.5A, 3.1V
≤
V
IN
≤
9V,
T
J
=0~125
°
C
1.225 1.250 1.275
V
V
OUT
Output Voltage
APL1087-18
APL1087-25
APL1087-33
T
J
=0~125
°
C,
0
≤
I
OUT
≤
0.5A, 3.25V
≤
V
IN
≤
9V,
T
J
=0~125
°
C,
0
≤
I
OUT
≤
0.5A, 3.95V
≤
V
IN
≤
9V,
T
J
=0~125
°
C,
0
≤
I
OUT
≤
0.5A, 4.75V
≤
V
IN
≤
9V,
1.764
2.450
3.235
1.800
2.500
3.300
1.836
2.550
3.365
V
REG
LINE
Line Regulation
APL1087
APL1087-18
APL1087-25
APL1087-33
T
J
=0~125
°
C
I
OUT
=
10mA, 3.1V
≤
V
IN
≤
9V, (note1)
I
OUT
=
0mA, 3.25V
≤
V
IN
≤
9V, (note1)
I
OUT
=
0A, 3.95V
≤
V
IN
≤
9V, (note 1)
I
OUT
=
0A, 4.75V
≤
V
IN
≤
9V, (note 1)
0.03
1
1
1
0.2
6
6
6
%
mV
REG
LOAD
Load Regulation
APL1087
APL1087-18
APL1087-25
APL1087-33
T
J
=0~125
°
C
(V
IN
–V
OUT
)=3V, 0
≤
I
OUT
≤
0.5A ,(note 1)
V
IN
=3.25V, 0
≤
I
OUT
≤
0.5A ,(note 1)
V
IN
=3.95V, 0
≤
I
OUT
≤
0.5A ,(note 1)
V
IN
=4.75V, 0
≤
I
OUT
≤
0.5A ,(note 1)
0.4
0.6
%
V
D
Dropout Voltage
I
OUT
=0.5A ,T
J
=0~125
°
C
1.3
1.45
V
I
LIMIT
Current Limit
(V
IN
-V
OUT
)=5V, T
J
=25
°
C
800
mA
I
ADJ
Adjust Pin Current (V
IN
-V
OUT
)
=3V, I
OUT
=10mA, T
J
=0~125
°
C
60
120
µ
A
∆
I
ADJ
Adjust Pin Current
Change
T
J
=
0~125
°
C, 10mA
≤
I
OUT
≤
0.5A,
1.45V
≤
V
IN
-V
OUT
≤
7.55V
0.2
5
µ
A
I
O
Minimum Load
Current
T
J
=0~125
°
C, V
IN
=9V, (note 3)
1.7
mA
PSRR Ripple Rejection
F
RIPPLE
=120Hz, V
RIPPLE
=1V
P-P,
(V
IN
-V
OUT
)
=3V, T
J
=0~125
°
C
60
75
dB
T
R
Thermal
Regulation
T
J
=25
°
C, 30ms Pulse
0.01
0.02
%/ W
T
S
Temperature
Stability
0.5
%
L
S
Long -Term
Stability
T
J
=125
°
C,1000Hrs.
0.3
%
V
N
RMS Output
Noise
T
J
=25
°
C,10Hz
≤
F
≤
10kHz, (% of V
OUT
)
0.003
%
OT
Over Temperature
Point
150
°
C
Quiescent Current
APL1087-18
APL1087-25
APL1087-33
T
J
=0~125
°
C,
V
IN
≤
9V
V
IN
≤
9V
V
IN
≤
9V
5.5
5.5
5.5
10
10
10
mA
Electrical Characteristics
Copyright
ANPEC Electronics Corp.
Rev. A.7 - Jun., 2003
APL1087
www.anpec.com.tw
4
V
IN
1 0µ
F
APL1087
OUT
IN
ADJ
V
OUT
150
µ
F
1 0µ
F
C
R1
R2
+
+
*
3
Application Circuits
* Needed if device is far from filter capacitors
1.25V to 7.15V Adjustable Regulator
Improving Ripple Rejection
R1
R2
R1
1.250V
V
OUT
+
×
=
V
IN
1 0 µ
F
APL1087
OUT
IN
ADJ
TTL
121
Ω
365
Ω
1%
1%
+
1k
1k
1 0 0 µ
F
5V
+
5V Regulator with Shutdown
V
IN
1 0 µ
F
C
1
V
O U T
+
R1
R2
AP L1087
O U T
IN
AD J
+
1 0 0 µ
F
C
2
121
Ω
*
*
* C
3
improves ripple rejection.
X
C
should be approximately
equal to R1 at ripple frequency
Electrical Characteristics (Cont.)
Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Load line regulations are mea-
sured at a constant junction temperature by low duty cycle pulse testing.
Note 2: Dropout voltage is specified over the full output current range of the device. Dropout voltage is defined as the minimum input/
output differential measured at the specified output current. Test points and limits are also shown on the Dropout Voltage curve.
Note 3: Minimum load current is defined as the minimum output current required to maintain regulation.
Copyright
ANPEC Electronics Corp.
Rev. A.7 - Jun., 2003
APL1087
www.anpec.com.tw
5
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
1
-0.5
0
0.5
1
1.5
2
2.5
3
3.5
-30
-25
-20
-15
-10
-5
0
5
10
Typical Characteristics
Load Transient Response
Output Current (A)
Output Voltage Deviation (mV)
Time (
µ
s)
Line Transient Response
Input Voltage (V)
Output Voltage Deviation (mV)
Time (
µ
s)
0
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6 1.8
2
-20
-10
0
10
20
30
40
50
0
1
2
3
4
5
6
7
Adjust Pin Current vs. Temperature
-50
0
50
100
150
55
56
57
58
59
60
61
62
Adjust Pin Current (
µ
A)
Current Limit vs. Temperature
-50
0
50
100
150
760
780
800
820
840
860
880
900
920
940
V
IN=
5V
Current Limit (mA)
Temperature (
°
C)
Temperature(
°
C)
V
OUT
=1.25V
V
OUT
=3.3V
V
IN
I
OUT
Copyright
ANPEC Electronics Corp.
Rev. A.7 - Jun., 2003
APL1087
www.anpec.com.tw
6
Typical Characteristics (Cont.)
Dropout Voltage vs. Temperature
I
OUT
=500mA
-50
-25
0
25
50
75
100
125
150
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Drpout Voltage (V)
Temperature (
°
C)
3
3.1
3.2
3.3
3.4
-50
-25
0
25
50
75
100
125
Output Voltage vs. Temperature
Output Voltage (V)
Temperature (°C)
Reference Voltage vs. Temperature
-50
-25
0
25
50
75
100
125
150
1.22
1.225
1.23
1.235
1.24
1.245
1.25
1.255
Reference Voltage (V)
Temperature (
°
C)
1.6
1.7
1.8
1.9
2
2.1
2.2
2.3
2.4
2.5
2.6
-50
-25
0
25
50
75
100
125
Output Voltage vs. Temperature
Output Voltage (V)
Temperature (°C)
Copyright
ANPEC Electronics Corp.
Rev. A.7 - Jun., 2003
APL1087
www.anpec.com.tw
7
Typical Characteristics (Cont.)
Current Limit vs. Input Voltage
Current Limit (mA)
Input Voltage (V)
Load Regulation vs. Output Current
V
IN
=5V
100
200
300
400
500
600
700
800
0
1
2
3
4
5
6
7
8
Load Regulation(mV)
Output Current (mA)
Dropout Voltage vs. Output Current
0
200
400
600
800
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
Dropout Voltage (V)
Output Current (mA)
V
OUT
=1.25V
0
0.5
1
1.5
2
2.5
3
3.5
0
1
2
3
4
5
6
7
8
9
Output Voltage vs. Input Voltage
Input Voltage (V)
Output Voltage (V)
4
5
6
7
8
9
830
840
850
860
870
880
890
900
910
920
930
940
Copyright
ANPEC Electronics Corp.
Rev. A.7 - Jun., 2003
APL1087
www.anpec.com.tw
8
D
D1
e
B1
e1
B
1
2
3
L
H
E
C
a
a
A
Package Information
SOT-89 (Reference EIAJ ED-7500A Reg stration SC-62)
M illim eters
Inches
Dim
M in.
M ax.
M in.
M ax.
A
1.40
1.60
0.055
0.063
B
0.40
0.56
0.016
0.022
B1
0.35
0.48
0.014
0.019
C
0.35
0.44
0.014
0.017
D
4.40
4.60
0.173
0.181
D1
1.35
1.83
0.053
0.072
e
1.50 BSC
0.059 BSC
e1
3.00 BSC
0.118 BSC
E
2.29
2.60
0.090
0.102
H
3.75
4.25
0.148
0.167
L
0.80
1.20
0.031
0.047
α
10
°
10
°
Copyright
ANPEC Electronics Corp.
Rev. A.7 - Jun., 2003
APL1087
www.anpec.com.tw
9
Package Information
SOT-223( Reference JEDEC Registration SOT-223)
B1
D
H
E
K
e
e1
A
c
L
A1
a
B
b
Millimeters
Inches
Dim
Min.
Max.
Min.
Max.
A
1.50
1.80
0.06
0.07
A1
0.02
0.08
B
0.60
0.80
0.02
0.03
B1
2.90
3.10
0.11
0.12
c
0.28
0.32
0.01
0.01
D
6.30
6.70
0.25
0.26
E
3.30
3.70
0.13
0.15
e
2.3 BSC
0.09 BSC
e1
4.6 BSC
0.18 BSC
H
6.70
7.30
0.26
0.29
L
0.91
1.10
0.04
0.04
K
1.50
2.00
0.06
0.08
α
0
°
10
°
0
°
10
°
β
13
°
13
°
Copyright
ANPEC Electronics Corp.
Rev. A.7 - Jun., 2003
APL1087
www.anpec.com.tw
10
Package Information
b2
L1
Q
L2
A
b
L
SEATING PLANE
e1
e
J
E
S