AIC1117
800mA Low Dropout Positive Adjustable
Regulator
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FEATURES
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DESCRIPTION
The AIC1117 is a low dropout three terminal
regulator with 800mA output current capability.
The output voltage is adjustable with the use
of a resistor divider. For fixed output voltage
versions, the output voltage is internally set at
2.85V, 3.3V or 5V. Dropout is guaranteed at a
maximum of 1.3V at maximum output current.
Its low dropout voltage and fast transient
response
and
make
it
ideal
for
low
voltage
microprocessor applications. Internal current
thermal
limiting
provides
protection
against any overload condition that would
create excessive junction temperatures.
Dropout Voltage 1.2V at 800mA Output Current.
Fast Transient Response.
Line Regulation typically at 0.015%.
Load Regulation typically at 0.1%.
Internal Thermal and Current Limiting.
Adjustable Output Voltage or Fixed 2.85V, 3.3V,
5V.
Standard 3-Pin Power Packages.
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APPLICATIONS
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SCSI-2 Active Terminator.
Post Regulator for Switching Supply.
Battery Chargers.
Constant-Current Regulators.
PC Add-On Card.
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TYPICAL APPLICATION CIRCUIT
V
IN
5V
C1 +
10
µ
F
3
AIC1117
1 ADJ
2
V
REF
V
REF
=V
OUT
- V
ADJ
=1.25V (typ.)
V
OUT
3.3V
RF1
125
Ω
1%
+
C2
10
µ
F
V
OUT
=V
REF
x (1+RF2/RF1)+ I
ADJ
x RF2
I
ADJ
=55µA (typ.)
(1) C1 needed if device is far away from filter
capacitors.
(2) C2 required for stability.
RF2
205
Ω
1%
Adjustable Voltage Regulator
V
IN
5V
C1 +
10
µ
F
3
AIC1117-28
AIC1117-33
AIC1117-50
1
2
V
OUT
+
C2
10
µ
F
GND
Fixed Voltage Regulator
Analog Integrations Corporation
DS-1117-00
Mar 13, 00
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
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AIC1117
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ORDERING INFORMATION
AIC1 117-XXXX
PACKAGING TYPE
E: TO-252
M: TO-263
T: TO-220
Y: SOT-223
TEMPERATURE RANGE
C: 0
°
C~+70
°
C
OUTPUT VOLTAGE
DEFAULT: ADJ.
28: 2.85V
33: 3.3V
50: 5.0V
ORDER NUMBER
AIC1117CE
(TO-2 52)
PIN CONFIGURATION
FRONT VIEW
1: ADJ (GND)
2: VOUT (TAB)
3: VIN
1
2
3
AIC1 117CM
(TO-263)
FRONT VIEW
1: ADJ (GND)
2: VOUT (TAB)
3: VIN
1
2
3
AIC1117CT
(TO-220)
FRONT VIEW
1: ADJ (GND)
2: VOUT (TAB)
3: VIN
1
2
3
AIC1117CY
(SOT-223)
FRONT VIEW
1: ADJ (GND)
2: VOUT (TAB)
3: VIN
1
2
3
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ABSOLUTE MAXIMUM RATINS
VIN pin to ADJ/ GND pin ...........................… … .......… … .....… … … … ............................ 7V
Operating Junction Temperature Range
Storage Temperature
Range
..................… … … ...................... 0°C ~ 125°C
...............................… … … … ................. - 65°C ~ 150°C
TO-220 … … … ........… … ...… … … … ... 3°C /W
TO-252 … ....… … ....… … … … … … ..12.5°C /W
SOT-223
Lead Temperature (Soldering) 10 sec.
… ....… … ..… … … ..… … … ..15°C /W
Thermal Resistance (Junction to Case)
.....................… … … ............… … … ...… .......260°C
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TEST CIRCUIT
Refer to TYPICAL APPLICATION CIRCUIT.
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AIC1117
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TYPICAL
0.1
PERFORMANCE CHARACTERISTICS
Load Transient Response
Line Transient Response
Output Voltage
(mV, AC)
V
IN
=5V
C
IN
=1
µ
F
C
OUT
=10
µ
F (Tantalum)
V
OUT
=3.3V
50
0
Output Voltage
(V, AC)
0.05
0
-0.05
-0.1
--50
--100
0.4A
Input Voltage (V)
C
OUT
=10
µ
F (Tantalum)
V
OUT
=3.3V
Load Current
7.0
0.1A
6.0
0
40
80
120
160
200
0
10
20
30
40
50
Time (
µ
S)
Time (
µ
S)
Dropout Voltage (VOUT=3.3V)
1.19
Minimum Operating Current
Minimum Operating Current (mA)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
1
2
3
4
5
Minimum Differential Voltage (V)
1.18
1.17
1.16
1.15
1.14
0
100
200
300
400
500
600
700
800
900
Output Current (mA)
Differential Voltage (V)
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