AIC1723
500mA Low Dropout Linear Regulator
Analog Integrations Corporation
4F, 9 Industry E. 9th Rd, Science-Based Industrial Park, Hsinchu, Taiwan
DS-1723-01 012102
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
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FEATURES
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Low Dropout Voltage of 750mV at 500mA
Output Current (5.0V Output Version).
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Guaranteed 500mA Output Current.
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Internal 1.5
P-MOSFET Draws no Base
Current.
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Low Ground Current: 65
A.
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2% Accuracy Output Voltage of 3.3V/ 3.5V/
3.7V/ 3.8V/ 5.0V/ 5.2V.
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Input Voltage Range up to 12V (5.0V Output
Version).
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Needs only 4.7
F Output Capacitor for
Stability.
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Current Limiting and Thermal Protection.
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APPLICATIONS
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Voltage Regulator for CD-ROM Drivers.
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Voltage Regulator for LAN Cards.
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Voltage Regulator for Monitor Microprocessor.
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Voltage Regulator for RAM Module.
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Wireless Communication Systems.
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Battery Powered Systems.
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DESCRIPTION
The AIC1723 is a 3-pin low dropout linear
regulator. The superior characteristics of the
AIC1723 include zero base current loss, very
low dropout voltage, and 2% accuracy output
voltage. Typical ground current remains
approximately 65
A, under the output condition
of from zero up to the maximum load. Dropout
voltage at 500mA output current is exceptionally
low: 750mV for the AIC1723-50 and AIC1723-
52, 900mV for the AIC1723-38, AIC1723-37,
AIC1723-35, and the AIC1723-33. Current
limiting and thermal protection are built in to
protect AIC1723 against fault conditions.
The AIC1723 comes in the popular SOT-223,
and TO-252 packages.
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TYPICAL APPLICATION CIRCUIT
+
+
AIC1723
V
OUT
VOUT
GND
VIN
1
F
C
IN
V
I N
10
F
C
OUT
Low Dropout Linear Regulator
AIC1723
2
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ORDERING INFORMATION
PIN CONFIGURATION
TO-252 (CE)
FRONT VIEW
1: VOUT
2: GND
3: VIN
2 3
1
2
3
1
SOT-223 (CY)
FRONT VIEW
1: VOUT
2: GND
3: VIN
TO-252 (CET)
FRONT VIEW
1: VIN
2: GND
3: VOUT
2 3
1
PACKING TYPE
TR: TAPE & REEL
BG: BAG (for SOT-223)
PACKAGE TYPE
E: TO-252
ET: TO-252
Y: SOT-223
OUTPUT VOLTAGE
33: 3.3V
35: 3.5V
37: 3.7V
38: 3.8V
50: 5.0V
52: 5.2V
AIC1723-XXCXX XX
Example: AIC1723-33CETR
3.3V Version, in TO-252 Package
& Tape & Reel Packing Type
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ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage
...................................... ... ... ... .................................... -0.3~12V
Operating Junction Temperature Range
.......... ... ... .............................. -40
C~ 125
C
Storage Temperature Range
............................ ... ... ... .......................... -65
C~150
C
Power Dissipation
....... ... ... ... ... ... ... ... ... ... ... ... ... ..... ... ... ... ... ..... ... ............... 0.85W
Thermal Resistance
JC
TO-252 Package ....... ... .... ... ... ... ... ........... 12.5
C/W
SOT-223 Package ....... ... ... ... ..... ... ... .............15
C/W
Thermal Resistance Junction to Ambient TO-252
... ... ... ... ... ... ... ... ... ... ..... 100
C/W
(Assume no ambient airflow, no heatsink) SOT-223 ... ..... ... ..... ... ...... ..... ... ... 130
C /W
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TEST CIRCUIT
Refer to the TYPICAL APPLICATION CIRCUIT
AIC1723
3
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ELECTRICAL CHARACTERISTICS
(T
J
=25
C, C
IN
=1
F, C
OUT
=10
F, unless
otherwise specified.)
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
Output Voltage
AIC1723-52
AIC1723-50
AIC1723-38
AIC1723-37
AIC1723-35
AIC1723-33
V
IN
=5.5~12V, I
OUT
=0mA
V
IN
=5.5~12V, I
OUT
=0mA
V
IN
=4.7~12V, I
OUT
=0mA
V
IN
=4.7~12V, I
OUT
=0mA
V
IN
=4.7~12V, I
OUT
=0mA
V
IN
=3.6~12V, I
OUT
=0mA
5.100
4.900
3.725
3.625
3.430
3.234
5.2
5.0
3.8
3.7
3.5
3.3
5.300
5.100
3.875
3.775
3.570
3.366
V
Output Voltage
Temperature
Coefficiency
(Note 1)
50
PPM/
C
Line Regulation
I
OUT
=1mA
AIC1723-52
AIC1723-50
AIC1723-38
AIC1723-37
AIC1723-35
AIC1723-33
V
IN
=5.5~12V
V
IN
=5.5~12V
V
IN
=4.7~12V
V
IN
=4.7~12V
V
IN
=4.7~12V
V
IN
=4.7~12V
3
3
3
3
3
3
10
10
10
10
10
10
mV
Load Regulation
(Note 2)
AIC1723-52
AIC1723-50
AIC1723-38
AIC1723-37
AIC1723-35
AIC1723-33
V
IN
=7V, I
OUT
=0.1~500mA
V
IN
=7V, I
OUT
=0.1~500mA
V
IN
=5V, I
OUT
=0.1~500mA
V
IN
=5V, I
OUT
=0.1~500mA
V
IN
=5V, I
OUT
=0.1~500mA
V
IN
=5V, I
OUT
=0.1~500mA
20
20
20
20
20
20
50
50
50
50
50
50
mV
Current Limit
(Note 3)
AIC1723-52
AIC1723-50
AIC1723-38
AIC1723-37
AIC1723-35
AIC1723-33
V
IN
=7V, V
OUT
=0V
V
IN
=7V, V
OUT
=0V
V
IN
=5V, V
OUT
=0V
V
IN
=5V, V
OUT
=0V
V
IN
=5V, V
OUT
=0V
V
IN
=5V, V
OUT
=0V
650
650
650
650
650
650
mA
AIC1723
4
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ELECTRICAL CHARACTERISTICS
(Continued)
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
Dropout Voltage
(Note 4)
AIC1723-52
AIC1723-50
AIC1723-38
AIC1723-37
AIC1723-35
AIC1723-33
I
OUT
=500mA
I
OUT
=500mA
I
OUT
=500mA
I
OUT
=500mA
I
OUT
=500mA
I
OUT
=500mA
750
750
900
900
900
900
850
850
1050
1050
1050
1050
mV
Ground Current
I
OUT
=0.1mA~I
MAX
AIC1723-52
AIC1723-50
AIC1723-38
AIC1723-37
AIC1723-35
AIC1723-33
V
IN
=5.5~12V
V
IN
=5.5~12V
V
IN
=4.7~12V
V
IN
=4.7~12V
V
IN
=4.7~12V
V
IN
=4~12V
65
65
65
65
65
65
90
90
90
90
90
90
A
Note 1: Guaranteed by design.
Note 2: Regulation is measured at constant junction temperature, using pulse testing with a low ON time.
Note 3: Current limit is measured by pulsing a short time.
Note 4: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below the value
measured with a 1V differential.
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TYPICAL PERFORMANCE CHARACTERISTICS
0
10
20
30
40
50
60
0
2
4
6
8
10
12
Ground Current (
A)
Input Voltage (V)
Fig. 1 Ground Current vs. Input Voltage
Output Current I
OUT
(
mA)
Input Voltage V
IN
(V)
Fig 2 Recommended Max. Output Current vs. Input
Voltage
4
5
6
7
8
9
10
11
12
100
200
500
600
3V
5.0V
,
400
300
3.3V
3.5V
3.7V, 3.8V
AIC1723
5
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TYPICAL PERFORMANCE CHARACTERISTICS
(Continued)
Fig. 3 Load Transient Response
Time (mS)
Load Current
(
mA)
Output Voltage
(
mV, AC)
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8 2.0
50
0
-50
250
0.1
100
100
C
OUT
=10
F (Tantalum)
V
OUT
=5.0V
Fig. 4 Line Transient Response
Time (mS)
Input Voltage
(V)
Output Voltage
(
mV, AC)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9 1.0
50
0
-50
8
6
100
C
OUT
=1
F (Tantalum)
I
L
=1mA
V
OUT
=5.0V
Fig. 5 Load Transient Response
Time (mS)
Load Current
(
mA)
Output Voltage
(
mV, AC)
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
250
0.1
200
100
0
-
100
C
OUT
=1
F (Tantalum)
V
OUT
=5.0V
100
100
200
300
400
500
Load Current(mA)
Fig. 6 Dropout Voltage vs. Load Current
800
700
600
500
400
300
200
100
0
V
OUT
=3.3V,3.5V, 3.7V & 3.8V
V
OUT
=5.0V , 5.2V
Dropout Voltage (mV)
AIC1723
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BLOCK DIAGRAM
V
REF
1.235V
GND
VOUT
VIN
ERROR
AMP
+
-
THERMAL
LIMITING
-
+
CURRENT
LIMITING
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PIN DESCRIPTIONS
VOUT PIN - Output pin.
GND PIN - Power GND.
VIN PIN
- Power Supply Input.
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APPLICATION INFORMATIONS
A 4.7
F (or greater) capacitor is required between
the AIC1723 output and ground for stability.
Without this capacitor the part will oscillate. Even
though most types of capacitor may work, the
equivalent series resistance (ESR) should be held
to 5
or less if Aluminum electrolytic type is used.
Many Aluminum electrolytics have electrolytes that
freeze at about -30
C, so solid tantalums are
recommended for operation below -25
C. The
value of this capacitor may be increased without
limit.
A 0.1
F capacitor (or greater) should be placed
from the AIC1723 input to ground if the lead
inductance between the input and power source
exceeds 500nH (approximately 10 inches of
trace).
AIC1723
7
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PHYSICAL DIMENSIONS
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SOT-223 (unit: mm)
SYMBOL
MIN
MAX
A1
0.02
0.12
B
0.60
0.80
B1
2.90
3.15
C
0.24
0.35
D
6.30
6.80
E
3.30
3.70
e
2.30 (TYP.)
H
6.70
7.30
0
~ 10
13
3
13
3
C
0.91 MIN
E
H
D
B1
3 (PLCS)
B
A1
13
3
1.80 MAX
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SOT-223 MARKING
Part No.
Marking
Part No.
Marking
AIC1723-33
AJ33
AIC1723-38
AJ38
AIC1723-35
AJ35
AIC1723-50
AJ50
AIC1723-37
AJ37
AIC1723-52
AJ52
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TO-252 (unit: mm)
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
E
b2
A
C1
A1
H
D
L
b
e
L
0.51
-
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