AIC AIC1085-18CM 3a low dropout positive adjustable regulator Datasheet

AIC1085
3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
SPEC NO: DS-1085-01 FEB 02, 01
n FEATURES
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n DESCRIPTION
Dropout Voltage 1.3V at 3A Output Current.
Fast Transient Response.
Extremely Tight Line and Load Regulation.
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Internal Thermal and Current Limiting.
Adjustable Output Voltage or Fixed 1.5V, 1.8V,
3.3V.
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Standard 3-Pin Power Packages.
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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
n APPLICATIONS
microprocessor applications. Internal current and
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Mother Board I/O Power Supplies.
Microprocessor Power Supplies.
High Current Regulator.
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Post Regulator for Switching Supply.
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thermal limiting provides protection against any
overload condition that would create excessive
junction temperatures.
n TYPICAL APPLICATION CIRCUIT
3
VIN
5V
C1 +
10µF
AIC1085
2
1 ADJ
VOUT
3.3V
RF1
125Ω
1%
+
C2
RF2
10µF
205Ω
1%
VREF
VR E F=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.
Adjustable Voltage Regulator
3
VIN
5V
C1 +
10µF
AIC1085-33
2
1
VOUT
3.3V
+
C2
10µF
GND
Fixed Voltage Regulator
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C.
TEL: (8863)577-2500
FAX:(8863)577-2510
1
AIC1085
3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
SPEC NO: DS-1085-01 FEB 02, 01
n ORDERING INFORMATION
AIC1085-XXXX
ORDER NUMBER
PACKAGING TYPE
E: TO-252
M: TO-263
T: TO-220
AIC1085CE
(TO-252)
PIN CONFIGURATION
FRONT VIEW
1: ADJ (GND)
2: VOUT (TAB)
3: VIN
1
2
3
1
2
3
1
2
3
TEMPERATURE RANGE
C: 0°C~70°C
AIC1085CM
(TO-263)
OUTPUT VOLTAGE
DEFAULT: ADJ.
15: 1.5V
18: 1.8V
33: 3.3V
AIC1085CT
(TO-220)
FRONT VIEW
1: ADJ (GND)
2: VOUT (TAB)
3: VIN
FRONT VIEW
1: ADJ (GND)
2: VOUT (TAB)
3: VIN
n ABSOLUTE MAXIMUM RATINGS
Vin pin to ADJ/ GND pin .......................… … ...............… … … … … .......................... 7V
..................… … … ...................... 0°C~ 125° C
Operating Junction Temperature Range
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
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C.
TEL: (8863)577-2500
FAX:(8863)577-2510
2
AIC1085
3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
SPEC NO: DS-1085-01 FEB 02, 01
n
ELECTRICAL CHARACTERISTICS
(V IN=5V, TA=25°C, IO=10mA, Unless otherwise
specified)
PARAMETER
Reference Voltage (V OUT -V ADJ )
Output Voltage
Line Regulation
TEST CONDITIONS
MIN.
TYP.
MAX.
TA=25°C
1.238
1.25
1.262
AIC1085-15 VIN=5V
1.48
1.50
1.52
AIC1085-18 VIN=5V
1.78
1.80
1.82
AIC1085-33 VIN=5V
3.26
3.30
3.34
AIC1085 (Adj.)
Adj : 2.75V≤ VIN ≤5.25V
V
V
%
Fix : VOUT+1V≤ VIN ≤7V
0.015
TA=25° C
Load Regulation
UNIT
10mA < IO < 3A
TA=25°C
0.2
0.6
%
1.4
V
∆VOUT, ∆VREF =1%
Dropout Voltage
10mA ≤ IO ≤3A
1.3
0°C ≤TJ ≤125°C
Current Limit
Adjusted Pin Current (IADJ)
Adjusted Pin Current Change
(∆IADJ)
VIN = 5V
0°C ≤TJ ≤125° C
3
2.75V ≤ VIN ≤ 7V
2.75V ≤ VIN ≤ 7V
0°C ≤TJ ≤125° C
IO=0.5A
4
A
55
120
µA
0.2
5
µA
Temperature Stability
0°C ≤TJ ≤125° C
0.5
Minimum Load Current
0°C ≤TJ ≤125°C
5
RMS Output Noise (% of VOUT)
10Hz ≤ f ≤ 10KHz
%
10
mA
0.003
%
72
dB
120Hz input ripple
Ripple Rejection Ratio
COUT=25µF
60
(V IN -V OUT)=3V
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C.
TEL: (8863)577-2500
FAX:(8863)577-2510
3
AIC1085
3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
SPEC NO: DS-1085-01 FEB 02, 01
n BLOCK DIAGRAM
VIN
Current Amp.
+
VREF +
1.25V
-
GM
Thermal
Limit
Current
Limit
55 µA
VOUT
For fixed voltage
device
GND
ADJ
n PIN DESCRIPTIONS
ADJ PIN
-
(GND PIN -
Providing VREF=1.25V (typ.) for
adjustable VOUT. VREF =VOUT-V ADJ
and IADJ=55µA (typ.)
VOUT PIN -
Adjustable output voltage.
VIN PIN
Power Input.
-
Power Ground.)
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C.
TEL: (8863)577-2500
FAX:(8863)577-2510
4
AIC1085
3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
SPEC NO: DS-1085-01 FEB 02, 01
n TYPICAL
PERFORMANCE CHARACTERISTICS
Load Transient Response
Line Transient Response
Output Voltage
(mV, AC)
Output Voltage
(V, AC)
0.1
0.05
0
-0.05
V IN =5V
CIN=1µ F
COUT=10 µF (Tantalum)
V OUT=3.3V
1.5A
0.1A
0
40
80
120
160
0
--50
COUT=10 µF (Tantalum)
VOUT=3.3V
--100
Input Voltage (V)
Load Current
-0.1
50
7.0
6.0
0
200
10
20
Time ( µS)
Dropout Voltage (VOUT=3.3V)
Minimum Operating Current (mA)
Minimum Differential Voltage (V)
1.20
1.18
1.16
1.14
1.12
1.10
1.08
1.06
0.5
1.0
1.5
40
50
Minimum Operating Current
1.22
0.0
30
Time (µ S)
2.0
2.5
3.0
Output Current (A)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
1
2
3
4
5
Differential Voltage (V)
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C.
TEL: (8863)577-2500
FAX:(8863)577-2510
5
AIC1085
3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
SPEC NO: DS-1085-01 FEB 02, 01
n PHYSICAL DIMENSIONS
l
TO-220 (unit: mm)
A
E
Φ3.81±0.27
F
D
SYMBOL
MIN
MAX
A
3.56
4.82
D
14.23
16.51
E
9.66
10.66
e
2.29
2.79
e1
0.50
1.15
e2
-
1.10
F
0.51
1.39
J1
2.04
2.92
L
12.70
14.73
L
e1
J1
e
l
e2
TO-252 (unit: mm)
E
C1
b2
A
D
H
L
b
e
A1
SYMBOL
MIN
MAX
A
2.19
2.38
A1
1.02
1.27
b
0.64
0.88
b2
5.21
5.46
C1
0.46
0.58
D
5.33
5.59
E
6.35
6.73
e
2.28 (TYP.)
H
9.40
10.42
L
0.51
-
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C.
TEL: (8863)577-2500
FAX:(8863)577-2510
6
AIC1085
3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
SPEC NO: DS-1085-01 FEB 02, 01
l
TO-263 (unit: mm)
E
A
C2
L2
L
D
L1
MIN
MAX
A
4.06
4.83
b
0.50
1.00
b2
1.14
1.40
C
-
0.7
c2
1.14
1.40
D
8.63
9.66
E
9.65
10.29
e
e
b2
SYMBOL
C
b
2.54 (TYP.)
L
14.60
15.88
L1
2.28
2.80
L2
-
1.40
UNIT: mm
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C.
TEL: (8863)577-2500
FAX:(8863)577-2510
7
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