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Analog Intergrations Corporation |
AIC1085
3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
SPEC NO: DS-1085-01 FEB 02, 01
n FEATURES
l Dropout Voltage 1.3V at 3A Output Current.
l Fast Transient Response.
l Extremely Tight Line and Load Regulation.
l Internal Thermal and Current Limiting.
l Adjustable Output Voltage or Fixed 1.5V, 1.8V,
3.3V.
l Standard 3-Pin Power Packages.
n APPLICATIONS
l Mother Board I/O Power Supplies.
l Microprocessor Power Supplies.
l High Current Regulator.
l Post Regulator for Switching Supply.
n DESCRIPTION
The AIC1085 is a low dropout three terminal
regulator with 3A output current capability. The
output voltage is adjustable with the use of a resistor
divider or fixed 1.5V, 1.8V, and 3.3V. Dropout is
guaranteed at a maximum of 1.4V at maximum
output current. Its low dropout voltage and fast
transient response make it ideal for low voltage
microprocessor applications. Internal current and
thermal limiting provides protection against any
overload condition that would create excessive
junction temperatures.
n TYPICAL APPLICATION CIRCUIT
VIN 3 AIC1085 2
5V
VOUT
3.3V
C1 +
10µF
1 ADJ
VREF RF1
125Ω
1% +
C2
RF2
205Ω
10µF
1%
Adjustable Voltage Regulator
VREF=VOUT - VADJ=1.25V (typ.)
VOUT=VREF x (1+RF2/RF1)+ IADJ x RF2
IADJ=55µA (typ.)
(1) C1 needed if device is far away from
filter capacitors.
(2) C2 required for stability.
VIN 3
5V
C1 +
10µF
AIC1085-33 2
1
GND
VOUT
3.3V
+
C2
10µF
Fixed Voltage Regulator
ANALOG INTEGRATIONS CORPORATION
4F,9IndustryE.9thRoad,Science-basedIndustrialPark,Hsinchu,Taiwan, R.O.C.
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
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n ORDERING INFORMATION
AIC1085-XXXX
PACKAGING TYPE
E: TO-252
M: TO-263
T: TO-220
AIC1085
3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
SPEC NO: DS-1085-01 FEB 02, 01
ORDER NUMBER
AIC1085CE
(TO-252)
PIN CONFIGURATION
FRONT VIEW
1: ADJ (GND)
2: VOUT (TAB)
3: VIN
12 3
TEMPERATURE RANGE
C: 0°C~70°C
OUTPUT VOLTAGE
DEFAULT: ADJ.
15: 1.5V
18: 1.8V
33: 3.3V
AIC1085CM
(TO-263)
FRONT VIEW
1: ADJ (GND)
2: VOUT (TAB)
3: VIN
1 23
AIC1085CT
(TO-220)
FRONT VIEW
1: ADJ (GND)
2: VOUT (TAB)
3: VIN
1 23
n ABSOLUTE MAXIMUM RATINGS
Vin pin to ADJ/ GND pin .......................… … ...............… … … … … .......................... 7V
Operating Junction Temperature Range ..................… … … ...................... 0°C~ 125°C
Storage Temperature Range ...............................… … … … ................. - 65°C ~ 150°C
Thermal Resistance Junction to Case TO-252 … … … … … … … … .… … … … … 15°C/W
TO-263, TO-220 … … … ............… … … ... 6°C /W
Thermal Resistance Junction to Ambient TO-252 … … … … … … … … … … ..… 100°C/W
(Assume no ambient airflow, no heatsink) TO-263 … .....… … .....… … … … … ... 60°C /W
TO-220 … ....… … ....… … … … … … .. 50°C /W
Lead Temperature (Soldering) 10 sec. .....................… … … ............… … ..… .......260°C
n TEST CIRCUIT
Refer to TYPICAL APPLICATION CIRCUIT.
ANALOG INTEGRATIONS CORPORATION
4F,9IndustryE.9thRoad,Science-basedIndustrialPark,Hsinchu,Taiwan, R.O.C.
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
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