800mA Low Dropout Fast Response Positive Adjustable Regulator and Fixed
1.8V, 2.5V and 3.3V
FeaturesGeneral Description
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Guaranteed Output Voltage Accuracy within 2%
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Fast Transient Response
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Guaranteed Dropout Voltage at Multiple Cur-
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rents
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Load Regulation : 0.6% Typ.
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Line Regulation : 0.03% Typ.
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• Low Dropout Voltage : 1.3V Typ. at I
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• Current Limit : 0.8A Min. at T
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• On-Chip Thermal Limiting : 150 °C Typ.
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• Adjustable Output : 1.25~7.15V
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• Standard 3-pin SOT-89, SOT-223,TO-92 and
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TO-252 Power Packages.
=125°C
J
=500mA
OUT
Applications
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• Voltage Regulator for CD-ROM Drivers
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• Voltage Regulator for LAN Cards
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• Voltage Regulator for mother Boards
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• Wireless Communication Systems
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• Portable Instrument
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• Portable Consumer Equipment
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The APL1087E 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 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 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 APL1087E is available in the industry standard
3-pin SOT-89, SOT-223,TO-92 and TO-252 power
packages.
Pin Description
V
IN
GND
213
GND
IN
V
OUT
V
SOT-89 (Front View)
TO-92 (Top View)
V
OUT
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• Low Voltage Systems
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123
OUT
V
GND
SOT-223 (Front View)
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.
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 RegulatorImpro ving Ripple Rejection
APL1087E
V
IN
+
10µ
*
C
1
OUTIN
R2
121
R1
Ω
ADJ
F
* Needed if device is far from filter capacitors
OUT
1.250VV
×=
5V Regulator with Shutdown
APL1087E
V
IN
TTL
+
10µ
F
1k
OUTIN
ADJ
1k
+
R1
APL1087E
V
OUT
100µ
+
F
*
C
2
V
10µ
ADJ
OUTIN
R1
IN
+
F
V
OUT
150µF
*
C
3
+
R2
10µ
F
* C3 improves ripple rejection.
R2R1
XC should be approximately
equal to R1 at ripple frequency
Terminal MaterialSolder-Plated Copper (Solder Material : 90/10 or 63/37 SnPb).
Lead SolderabilityMeets EIA Specification RSI86-91, ANSI/J-STD-002 Category 3.
Reflow Condition (IR/Convection or VPR Reflow)
Reference JEDEC Standard J-STD-020A APRIL 1999
Peak temperature
°
temperature
Pre-heat temperature
183 C
Time
Classificatio n R e flow Profiles
Convection or IR/
Convection
Average ramp-up rate(183°C to Peak)3°C/second max.10 °C /second max.
Preheat temperature 125 ± 25°C)
Temperature maintained above 183°C
Time within 5°C of actual peak temperature
Peak temperature range
Ramp-down rate
Time 25°C to peak temperature
120 seconds max.
60 ~ 150 seconds
10 ~ 20 seconds60 seconds
220 +5/-0°C or 235 +5/-0°C215~ 219°C or 235 +5/-0°C
6 °C /second max.10 °C /second max.
6 minutes max.
VPR
Package Reflow Conditions
pkg. thickness ≥≥≥≥ 2.5mm
and all bags
Convection 220 +5/-0 °CConvection 235 +5/-0 °C
VPR 215-219 °CVPR 235 +5/-0 °C
IR/Convection 220 +5/-0 °CIR/Convection 235 +5/-0 °C
pkg. thickness < 2.5mm and
pkg. volume ≥≥≥≥ 350 mm³