AIC1117A
1A Low Dropout Positive Adjustable Regulator
Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
www.analog.com.tw
DS-1117A-00 May 21, 01
TEL: 886-3-5772500 FAX: 886-3-5772510
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FEATURES
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Dropout Voltage 1.3V at 1A Output Current.
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Fast Transient Response.
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Line Regulation typically at 0.015%.
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Load Regulation typically at 0.1%.
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Internal Thermal and Current Limiting.
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Adjustable Output Voltage or Fixed 2.85V, 3.3V,
5V.
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Standard 3-Pin Power Packages.
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APPLICATIONS
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Post Regulator for Switching Supply.
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Active SCSI Termination.
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Battery Chargers.
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Constant-Current Regulators.
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Motherboard Clock Supplies.
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DESCRIPTION
The AIC1117A is a low dropout three terminal
regulator with 1A output current capability. The
output voltage is adjustable with the use of a
resistor divider or fixed 2.85V, 3.3V, 5V. Dropout
is guaranteed at a maximum of 1.5V 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.
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TYPICAL APPLICATION CIRCUIT
C2
10
F
V
OUT
3.3V
V
IN
5V
+
+
V
REF
RF2
205
1%
ADJ
AIC1117A
C1
10
F
2
3
1
RF1
125
1%
V
REF
=V
OUT
- V
ADJ
=1.25V (typ.)
V
OUT
=V
REF
x (1+RF2/RF1)+ I
ADJ
x RF2
I
ADJ
=55
A (typ.)
(1) C1 needed if device is far away from filter
capacitors.
(2) C2 required for stability.
Adjustable Voltage Regulator
C2
10
F
V
OUT
3.3V
V
IN
5V
+
+
GND
C1
10
F
AIC1117A-33
Fixed Voltage Regulator
AIC1117A
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ORDERING INFORMATION
AIC1117A-XXCX
PACKAGING TYPE
E: TO-252
M: TO-263
T: TO-220
Y: SOT-223
DEFAULT: ADJ.
28: 2.85V
33: 3.3V
50: 5.0V
ORDER NUMBER
PIN CONFIGURATION
FRONT VIEW
1: ADJ
2: VOUT (TAB)
3: VIN
AIC1117ACM
(TO-263)
1 2
3
FRONT VIEW
1: ADJ
2: VOUT (TAB)
3: VIN
FRONT VIEW
1: ADJ
2: VOUT (TAB)
3: VIN
AIC1117ACT
(TO-220)
AIC1117ACY
(SOT-223)
2
3
1
2
3
1
FRONT VIEW
1: ADJ
2: VOUT (TAB)
3: VIN
AIC1117ACE
(TO-252)
2
3
1
AIC1117A
3
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ABSOLUTE MAXIMUM RATINS
VIN pin to ADJ/GND pin .............................. ... .......... ... .......... ... ... ... ... ...................... 7V
Operating Junction Temperature Range
..................... ... ... ...................... 0
C ~ 125
C
Power Dissipation ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .Internally Limited
Thermal Resistance (Junction to Case)
TO-220 ... ... ... ........... ... ...... ... ... ... ... 3
C /W
TO-263 ... ....... ... ....... ... ... ... ... ... ... ... . 3
C /W
SOT-223
... ....... ... ..... ... ... ..... ... ... ..15
C /W
TO-252 ... ... ... ... ... ... ... ... ... ... ... ..12.5
C /W
Thermal Resistance (Junction to Ambient) TO-220 ... ....... ... ....... ... ... ... ... ... ... 50
C/W
(Assume no ambient airflow, no heatsink)
TO-263 ... ........ ... ........ ... ... ... ... ... ..60
C/W
SOT-223 ... ... ... ... ... ... ... ... ... ... ... ..155
C/W
TO-252
... ... ... ... ... ... ... ... ... ... ... ..100
C/W
Storage Temperature Range
.................................. ... ... ... ................. - 65
C ~ 150
C
Lead Temperature (Soldering) 10 sec.
........................ ... ... ............... ... ... ...... .......260
C
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ELECTRICAL CHARACTERISTICS
(V
IN
=5V, T
J
=25
C, I
O
=10mA, Unless otherwise
specified)
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
Reference Voltage
T
J
=25
C
0
C
T
J
125
C
2.65V
V
IN
7V
10mA
I
O
1A
1.238
1.225
1.25
1.25
1.262
1.275
V
Output Voltage
AIC1117A-28, V
IN
=5V
AIC1117A-33, V
IN
=5V
AIC1117A-50, V
IN
=7V
AIC1117A
0
C
T
J
125
C
2.65V
V
IN
7V
10mA
I
O
1A
2.82
3.26
4.95
0.98V
N
2.85
3.30
5.00
V
N
2.88
3.33
5.05
1.02V
N
V
2.65
V
IN
7V
T
J
=25
C
0.015
0.2
Line Regulation
0
C
T
J
125
C
0.035
0.2
%V
OUT
AIC1117A
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ELECTRICAL CHARACTERISTICS
(Continued)
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
Load Regulation
T
J
=25
C, I
O
=10mA ~1A
0
C
T
J
125
C
0.1
0.2
0.3
0.4
%V
OUT
Dropout Voltage
V
OUT
,
V
REF
=1%
I
O
=1A
0
C
T
J
125
C
1.3
1.5
V
Current Limit
0
C
T
J
125
C
1
A
Adjusted Pin Current (I
ADJ
)
2.65
V
IN
7V
10mA
I
O
1A
0
C
T
J
125
C
55
120
A
Adjusted Pin Current Change
(
I
ADJ
)
2.65
V
IN
7V
10mA
I
O
1A
0
C
T
J
125
C
0.2
5
A
Temperature Stability
I
O
=0.5A
0
C
T
J
125
C
0.5
% V
OUT
Minimum Load Current ( Adj. )
0
C
T
J
125
C
5
10
mA
Quiescent Current ( Fixed Version)
0
C
T
J
125
C
10
14
mA
RMS Output Noise (% of V
OUT
)
10Hz
f
10KHz
0.003
%V
OUT
Ripple Rejection Ratio
120Hz input ripple
C
OUT
=25
F
60
72
dB
AIC1117A
5
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TYPICAL PERFORMANCE CHARACTERISTICS
Load Current
Load Transient Response
Time (
S)
0
40
80
120
160
200
0.1A
0.4A
-0.1
-0.05
0
0.05
0.1
Output Voltage
(V, AC)
V
IN
=5V
C
IN
=1
F
C
OUT
=10
F (Tantalum)
V
OUT
=3.3V
Line Transient Response
Time (
S)
Output Voltage
(
mV, AC)
Input Voltage (V)
0
10
20
30
40
50
6.0
7.0
--100
--50
0
50
C
OUT
=10
F (Tantalum)
V
OUT
=3.3V
0
200
400
600
800
1000
1.16
1.18
1.20
1.22
1.24
1.26
Dropout Voltage (V
OUT
=3.3V)
Minimum Differential Voltage (V)
Output Current (mA)
Minimum Operating Current
Differential Voltage (V)
Minimum Operating Current (mA)
0
1
2
3
4
5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
T
J
=125
C
Minimum Load Current (Adjustable Version)
Minimum Load Current (
mA)
Input/Output Differential (V)
T
J
=125
C
T
J
=0
C
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