AIC1117A
1A Low Dropout Positive Regulator
FEATURES
Dropout Voltage 1.3V at 1A Output Current.
Fast Transient Response.
Line Regulation, typical at 0.015%.
Load Regulation, typical at 0.1%
Current Limiting and Thermal Protection.
Adjustable Output Voltage or Fixed at 1.8V, 2.5V,
2.85V, 3.3V, and 5V.
Standard 3-Pin Power Packages.
DESCRIPTION
The AIC1117A is a low dropout, three terminals
regulator designed to provide output current up
to 1A. The device is available in an adjustable
version and fixed output voltage of 1.8V, 2.5V,
2.85V, 3.3V and 5V. Dropout voltage of
maximum of 1.5V is guaranteed at 1A output
current. The quality of low dropout voltage and
fast transient response make this device ideal
for low voltage microprocessor applications.
The AIC1117A requires output capacitance of a
minimum of 10µF for stability. Built-in output
current limiting and thermal limiting provide
maximal protection to the AIC1117A against
fault conditions.
APPLICATIONS
Active SCSI Terminators.
Post Regulators for Switching Supplies.
Battery Chargers.
PC Add-On Card.
TYPICAL APPLICATION CIRCUIT
V
IN
5V
3
AIC1117A
1 ADJ
C1 +
10µF
2
V
REF
V
OUT
3.3V
RF1
125Ω
+
1%
C2
RF2
10µF
205Ω
1%
V
REF
=V
OUT
- V
ADJ
=1.25V (typ.)
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.
Adjustable Voltage Regulator
V
IN
5V
3
AIC1117A-33
1
2
V
OUT
3.3V
+
C2
10µF
C1 +
10µF
GND
Fixed Voltage Regulator
Analog Integrations Corporation
Si-Soft Research Center
3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
DS-1117AP-04
010405
1
AIC1117A
ABSOLUTE MAXIMUM RATINGS
VIN pin to ADJ/GND pin
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temperature
Lead Temperature (Soldering, 10 sec)
Thermal Resistance (Junction to Case)
TO-220
TO-263
SOT-223
TO-252
Thermal Resistance (Junction to Ambient) TO-220
(Assume no ambient airflow, no heatsink) TO-263
SOT-223
TO-252
7V
–40°C to 85°C
–65°C to 150°C
125°C
260°C
3°C /W
3°C /W
15°C /W
12.5°C /W
50°C/W
.60°C/W
155°C/W
100°C/W
Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
TEST CIRCUIT
Refer to TYPICAL APPLICATION CIRCUIT.
ELECTRICAL CHARACTERISTICS
(V
IN
=5V, T
A
=25°C, I
O
=10mA, unless otherwise specified) (Note1)
PARAMETER
TEST CONDITIONS
T
J
=25°C
Reference Voltage
0°C≤T
J
≤125°C
2.65V≤V
IN
≤7V
10mA≤I
O
≤1A
AIC1117A-18, V
IN
=3.3V
AIC1117A-25, V
IN
=5V
AIC1117A-28, V
IN
=5V
AIC1117A-33, V
IN
=5V
Output Voltage
AIC1117A-50, V
IN
=7V
AIC1117A
0°C≤T
J
≤125°C
2.65V≤V
IN
≤7V
10mA≤I
O
≤1A
0.98VOUT
MIN.
1.238
TYP.
1.25
MAX.
1.262
UNIT
1.225
1.25
1.275
V
1.78
2.47
2.82
3.26
4.95
1.80
2.50
2.85
3.30
5.00
1.82
2.53
2.88
3.33
5.05
V
V
OUT
1.02VOUT
3
AIC1117A
ELECTRICAL CHARACTERISTICS
(Continued)
PARAMETER
Line Regulation
TEST CONDITIONS
2.65≤V
IN
≤7V,
T
J
=25°C
0°C≤T
J
≤125°C
T
J
=25°C, I
O
=10mA ~1A
0°C≤T
J
≤125°C
∆V
OUT
,
∆V
REF
=1%, I
O
=1A
MIN.
TYP.
0.015
0.035
0.1
0.2
1.3
MAX.
0.2
0.2
0.3
0.4
1.5
UNIT
%V
OUT
Load Regulation
Dropout Voltage
Current Limit
Adjusted Pin Current (I
ADJ
)
Adjusted Pin Current Change
(∆I
ADJ
)
Temperature Stability
Minimum Load Current ( Adj. )
Quiescent Current ( Fixed Version)
RMS Output Noise (% of V
OUT
)
Ripple Rejection Ratio
%V
OUT
V
A
1
2.65≤V
IN
≤7V
10mA≤I
O
≤1A
2.65≤V
IN
≤7V
10mA≤I
O
≤1A
I
O
=0.5A
0°C≤T
J
≤125°C
55
120
µA
µA
0.2
5
0.5
5
10
10
14
% V
OUT
mA
mA
%V
OUT
dB
10Hz
≤
f
≤
10KHz
120Hz input ripple
C
OUT
=25µF
60
0.003
72
Note 1:
Specifications are production tested at TA=25°C. Specifications over the -40°C to 85°C operating
temperature range are assured by design, characterization and correlation with Statistical Quality
Controls (SQC).
4
AIC1117A
TYPICAL PERFORMANCE CHARACTERISTICS
0.1
Output Voltage
(V, AC)
Output Voltage
(mV, AC)
V
IN
=5V
C
IN
=1µF
C
OUT
=10µF (Tantalum)
V
OUT
=3.3V
0.05
50
0
0
-0.05
-0.1
--50
--100
Input Voltage (V)
C
OUT
=10µF (Tantalum)
V
OUT
=3.3V
Load Current
0.4A
7.0
0.1A
6.0
0
40
80
120
160
200
0
10
20
30
40
50
Time (µS)
Time (µS)
Fig. 2 Line Transient Response
Fig. 1 Load Transient Response
Minimum Differential Voltage (V)
1.26
Minimum Operating Current (mA)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0
1
2
3
4
5
1.24
1.22
1.20
1.18
1.16
0
200
Output Current (mA)
400
600
800
1000
Differential Voltage (V)
Fig. 4
Minimum Operating Current
Fig. 3
Dropout Voltage (V
OUT
=3.3V)
5
Minimum Load Current (mA)
T
A
=125°C
4
3
T
A
=
25
°C
T
A
=0°C
2
1
0
1
2
Input/Output Differential (V)
3
4
5
6
7
8
9
Fig. 5
Minimum Load Current (Adjustable Version)
5
RF/Wirelessly
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