APL1087R
800mA Low Dropout Fast Response Positive Adjustable Regulator and Fixed
1.8V, 2.5V and 3.3V
Features General Description
••
•
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
••
••
• Current Limit : 0.8A Min. at T
••
••
• On-Chip Thermal Limiting : 150 °C Typ.
••
••
• Adjustable Output : 1.25~7.15V
••
••
• Standard 3-pin SOT-89 and TO-92 Power
••
Packages.
=125°C
J
=500mA
OUT
Applications
••
• Voltage Regulator for CD-ROM Drivers
••
••
• Voltage Regulator for LAN Cards
••
The APL1087R is a low dropout three-terminal adjustable 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 APL1087R has been optimized.
The device is available in an adjustable version and
fixed output voltages of 1.8V, 2.5V and 3.3V, the output available voltage range is from 1.25~7.15V with
an input supply below 9V. Dropout voltage is guaranteed 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 combination of overload that would create excessive junction temperatures.
The APL1087R is available in the industry standard
3-pin SOT-89 and TO-92 power packages.
Pin Description
IN
V
APL1087R
••
• Voltage Regulator for mother Boards
••
••
• Wireless Communication Systems
••
••
• Portable Instrument
••
••
• Portable Consumer Equipment
••
••
• Low Voltage Systems
••
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. A.2 - Apr., 2003
ADJ/GND
SOT-89 (Front View)
TO-92 (Top View)
213
OUT
IN
V
V
OUT
V
V
IN
ADJ/GND
www.anpec.com.tw1
77
7
APL1087R
77
Ordering and Marking Information
APL1087R-
AP L1087R D /E :
AP L1087R-18D/E :
Lead Free Code
Handling Code
Tem p. Range
Package Code
Voltage Cod e
AP L1087R
XXXXX
AP L1087R
XXXXX18
AP L1087R
XXXXX25
AP L1087R
XXXXX33
Package Code
D : S O T -8 9 E : TO -92
Tem p. Range
C : 0 to 70 C
Handling Code
T U : T ub e TR : T a p e & Re e l
Voltage Cod e
18 : 1 .8V 2 5 : 2 .5 V 33 : 3.3 V
Blank : Adjustable Version
Lead Free Device
L : L ea d F re e D e v ice Bla nk : O rig ina l D e vic e
XXXXX - Date Code
XXXXX - Date Code
XXXXX - Date CodeAP L1087R-25D/E :
XXXXX - Date CodeAP L1087R-33D/E :
°
Absolute Maximum Ratings
Symbol Parameter Rating Unit
V
I
T
J
T
STG
T
L
θ
JA
Input Voltage 9 V
Operating Junction Temperature Range
Control Section
Power T ran si sto r
0 to 125
0 to 150
Storage Temperature Range -65 to +150
Lead Temperature (Soldering, 10 second) 260
Thermal Resistance from Junction to Ambient in Free Air
SOT-89
TO-92
180
180
°
°
°
C/W
°
C
C
C
Copyright ANPEC Electronics Corp.
Rev. A.2 - Apr., 2003
www.anpec.com.tw2
APL1087R
Electrical Characteristics
Symbol Parameter Test Conditions
REF
Reference
Voltage
V
Output Voltage
APL1087R-18
V
OUT
APL1087R-25
APL1087R-33
Line Regulation
APL1087R
REG
LINE
APL1087R-18
APL1087R-25
APL1087R-33
Load Regulation
APL1087R
REG
LOAD
APL1087R-18
APL1087R-25
APL1087R-33
V
Dropout Voltage
D
I
LIMIT
I
∆
Current Limit
Adjust Pin Current
ADJ
Adjust Pin Current
I
ADJ
Change
Minimum Load
I
O
Current
PSRR Rip p le Re j ec tio n
Thermal
T
R
Regulation
Temperature
T
S
Stability
Long -Term
L
S
Stability
RMS Output
V
N
Noise
OT
Over Temperature
Point
Quiescen t Current
APL1087R-18
APL1087R-25
APL1087R-33
10mA≤ I
=0~125°C
T
J
T
=0~125°C,
J
0≤ I
OUT
T
=0~125°C,
J
0≤ I
OUT
=0~125°C,
T
J
0≤ I
OUT
=0~125°C
T
J
I
10mA, 3.1V≤V
=
OUT
0mA, 3.25V≤V
I
=
OUT
I
0A, 3.95V≤V
=
OUT
0A, 4.75V≤V
I
=
OUT
T
=0~125°C
J
(V
IN –VOUT
V
=3.25V, 0≤ I
IN
=3.95V, 0≤ I
V
IN
=4.75V, 0≤ I
V
IN
I
=0.5A ,T
OUT
(V
IN -VOUT
(V
IN -VOUT
T
0~125°C, 10mA≤ I
=
J
1.45V≤V
T
=0~125°C, V
J
F
RIPPLE
(V
IN -VOUT
T
=25°C, 30ms Pulse
J
=125°C,1000Hrs.
T
J
T
=25°C,10Hz≤F≤10kHz, (% of V
J
=0~125°C,
T
J
9V
V
≤
IN
V
9V
≤
IN
V
9V
≤
IN
0.5A, 3.1V≤V
≤
OUT
0.5A, 3.25V≤V
≤
0.5A, 3.95V≤V
≤
0.5A, 4.75V≤V
≤
IN
IN
≤
IN
≤
IN
)=3V, 0≤ I
J
OUT
0.5A ,(note 1)
≤
OUT
0.5A ,(note 1)
≤
OUT
0.5A ,(note 1)
≤
OUT
=0~125°C
)=5V, TJ=25°C
=3V, I
)
IN -VOUT
=120Hz, V
=3V, TJ=0~125°C
)
=10mA, TJ=0~125°C
OUT
7.55V
≤
=9V, (note 3)
IN
RIPPLE
≤
IN
9V,
≤
IN
9V,
≤
IN
9V,
≤
IN
9V, (note1)
≤
9V, (note1)
≤
9V, (note 1)
9V, (note 1)
0.5A ,( n ote 1 )
≤
0.5A,
≤
OUT
=1V
P-P,
9V,
OUT
APL1087R
Min. Typ. Max.
Unit
1.225 1.250 1.275 V
1.764
2.450
3.235
1.800
2.500
3.300
1.836
2.550
3.365
0.03
1
1
1
0.4 0.6
0.2
6
6
6
V
%
mV
%
1.3 1.45 V
800 mA
60 120
0.2 5
A
µ
A
µ
1.7 mA
60 75 dB
0.01 0.02 %/ W
0.5 %
0.3 %
)
0.003 %
150
5.5
5.5
5.5
10
10
10
°
mA
C
Copyright ANPEC Electronics Corp.
Rev. A.2 - Apr., 2003
www.anpec.com.tw3
APL1087R
Electrical Characteristics (Cont.)
Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Load line regulations are measured 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.
Application Circuits
1.25V to 7.15V Adjustable Regulator Improving Ripple Rejection
APL1087R
V
IN
+
10µ
*
C
1
OUTIN
R2
121
R1
Ω
+
ADJ
F
* Needed if device is far from filter capacitors
+
OUT
1.250VV
R2R1
×=
R1
5V Regulator with Shutdown
APL1087R
V
IN
TTL
+
10µ
F
1k
1k
ADJ
OUTIN
121
1%
365
1%
APL1087R
100µ
C
V
OUT
F
*
2
V
10µ
ADJ
OUTIN
R1
IN
+
F
V
OUT
150µF
*
C
3
+
R2
10µ
F
* C3 improves ripple rejection.
XC should be approximately
equal to R1 at ripple frequency
5V
Ω
+
100µ
Ω
F
Copyright ANPEC Electronics Corp.
Rev. A.2 - Apr., 2003
www.anpec.com.tw4
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