Copyright
ANPEC Electronics Corp.
Rev. A.3 - Jun., 2003
APL1087E
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 APL1087E is a low dropout three-terminal ad-
justable 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 APL1087E 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 APL1087E 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
V
IN
V
OUT
G N D
TO-92 (Top View)
SOT-89 (Front View)
V
IN
V
OUT
GND
2
1
3
1
2
3
V
I N
V
O U T
G N D
TO-252 (Front View)
1
2
3
V
IN
V
O UT
G ND
SOT-223 (Front View)
Copyright
ANPEC Electronics Corp.
Rev. A.3 - Jun., 2003
APL1087E
www.anpec.com.tw
2
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
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
7
7
7
7
7
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 t o 7 0 C
H a n d l i n g C o d e
T U : T u b e T R : T a p e & R e e l
V o l t a g e C o d e
1 8 : 1 . 8 V 2 5 : 2 . 5 V 3 3 : 3 . 3 V
B l a n k : A d j u s t a b l e V e r s i o n
L e a d F r e e C o d e
L : L e a d F r e e D e v i c e B l a n k : O r i g i n a l D e v i c e
A P L 1 0 8 7 E -
H a n d l i n 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 l t a g e C o d e
A P L 1 0 8 7 E - 3 3 U :
A P L 1 0 8 7 E
X X X X X
- D a t e C o d e
X X X X X
3 3
A P L 1 0 8 7 E - 2 5 U :
A P L 1 0 8 7 E
X X X X X
- D a t e C o d e
X X X X X
2 5
A P L 1 0 8 7 E - 1 8 U :
A P L 1 0 8 7 E
X X X X X
- D a t e C o d e
X X X X X
1 8
A P L 1 0 8 7 E U :
A P L 1 0 8 7 E
X X X X X
- D a t e C o d e
X X X X X
A P L 1 0 8 7 E
X X X X X
X X X X X - D a t e C o d e
A P L 1 0 8 7 E D / V / E :
A P L 1 0 8 7 E
X X X X X 2 5
X X X X X - D a t e C o d e
A P L 1 0 8 7 E - 2 5 D / V / E :
A P L 1 0 8 7 E
X X X X X 3 3
X X X X X - D a t e C o d e
A P L 1 0 8 7 E - 3 3 D / V / E :
A P L 1 0 8 7 E
X X X X X 1 8
X X X X X - D a t e C o d e
A P L 1 0 8 7 E - 1 8 D / V / E :
L e a d F r e e C o d e
Copyright
ANPEC Electronics Corp.
Rev. A.3 - Jun., 2003
APL1087E
www.anpec.com.tw
3
APL1087E
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
APL1087E-18
APL1087E-25
APL1087E-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
APL1087E
APL1087E-18
APL1087E-25
APL1087E-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
APL1087E
APL1087E-18
APL1087E-25
APL1087E-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
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
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
APL1087E-18
APL1087E-25
APL1087E-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.3 - Jun., 2003
APL1087E
www.anpec.com.tw
4
V
IN
1 0
F
APL1087E
O UT
IN
ADJ
V
OUT
150
F
1 0
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
F
A P L1087E
O U T
IN
A D J
T TL
121
365
1%
1%
+
1k
1k
1 0 0
F
5V
+
5V Regulator with Shutdown
V
IN
1 0
F
C
1
V
O U T
+
R 1
R 2
A P L 1 0 8 7 E
O U T
IN
A D J
+
1 0 0
F
C
2
1 2 1
*
*
* 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.3 - Jun., 2003
APL1087E
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 (
s)
Line Transient Response
Input Voltage (V)
Output Voltage Deviation (mV)
Time (
s)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
-20
-10
0
1 0
2 0
3 0
4 0
5 0
0
1
2
3
4
5
6
7
Adjust Pin Current vs. Temperature
-50
0
5 0
1 0 0
1 5 0
5 5
5 6
5 7
5 8
5 9
6 0
6 1
6 2
Adjust Pin Current (
A)
Current Limit vs. Temperature
-50
0
5 0
1 0 0
1 5 0
7 6 0
7 8 0
8 0 0
8 2 0
8 4 0
8 6 0
8 8 0
9 0 0
9 2 0
9 4 0
V
I N =
5 V
Current Limit (mA)
Temperature (
C)
Temperature(
C)
V
OUT
=1.25V
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