AIC1723
500mA Low Dropout Linear Regulator
Analog Integrations Corporation
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
www.analog.com.tw
DS-1723-01 May 3, 00
TEL: 886-3-5772500
FAX: 886-3-5772510
1
FEATURES
Low Dropout Voltage of 750mV at 500mA
Output Current (5.0V Output Version).
Guaranteed 500mA Output Current.
Internal 1.5
P-MOSFET Draws no Base
Current.
Low Ground Current at 65
A.
2% Accuracy Output Voltage of 3.3V/ 3.5V/
3.7V/ 3.8V/ 5.0V/ 5.2V.
Input Voltage Range up to 12V (5.0V Output
Version).
Needs only 4.7
F for Stability.
Current and Thermal Limiting.
APPLICATIONS
Voltage Regulator for CD-ROM Drivers.
Voltage Regulator for LAN Cards.
Voltage Regulator for Monitor Microprocessor.
Voltage Regulator for RAM Module.
Wireless Communication Systems.
Battery Powered Systems.
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, from no load to maximum loading
conditions. 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. Output current limiting and thermal
limiting are built in to provide maximal protection
to the AIC1723 against fault conditions.
The AIC1723 comes in the popular SOT-223,
TO-251 and TO-252 packages.
TYPICAL APPLICATION CIRCUIT
+
+
AIC1723
V
OUT
VOUT
GND
VIN
1
F
C
IN
V
IN
10
F
C
OUT
Low Dropout Linear Regulator
AIC1723
2
ORDERING INFORMATION
ORDER NUMBER
AIC1723-33CE
AIC1723-35CE
AIC1723-37CE
AIC1723-38CE
AIC1723-50CE
AIC1723-52CE
(TO-252)
PIN CONFIGURATION
PACKAGING TYPE
E: TO-252
F: TO-251
Y: SOT-223
ET: TO-252
TEMPERATURE RANGE
C: 0
C~+70C
OUTPUT VOLTAGE
33: 3.3V
35: 3.5V
37: 3.7V
38: 3.8V
50: 5.0V
AIC1723-XXXX
FRONT VIEW
1: VOUT
2: GND
3: VIN
2 3
1
2 3
1
2
3
1
AIC1723-33CF
AIC1723-35CF
AIC1723-37CF
AIC1723-38CF
AIC1723-50CF
AIC1723-52CF
(TO-251)
AIC1723-33CY
AIC1723-35CY
AIC1723-37CY
AIC1723-38CY
AIC1723-50CY
AIC1723-52CY
(SOT-223)
FRONT VIEW
1: VOUT
2: GND
3: VIN
FRONT VIEW
1: VOUT
2: GND
3: VIN
AIC1723-33CET
AIC1723-35CET
AIC1723-37CET
AIC1723-38CET
AIC1723-50CET
AIC1723-52CET
(TO-252)
FRONT VIEW
1: VIN
2: GND
3: VOUT
2 3
1
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage ................................................................................... -0.3~12V
Operating Junction Temperature Range .............................................. -40
C~ 125C
Storage Temperature Range ............................................................... -65
C~150C
Power Dissipation................................................................................... 0.85W
Thermal Resistance
JC
TO-251,
TO-252
Package........................... 12.5
C/W
SOT-223 Package ........................................15
C/W
TEST CIRCUIT
Refer to the TYPICAL APPLICATION CIRCUIT
AIC1723
3
ELECTRICAL CHARACTERISTICS
(Ta=25
C, C
IN
=1
F, C
OUT
=10
F, unless
otherwise specified.)
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
Output Voltage
No Load
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
=3.6~12V
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
L
=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
L
=0.1~500mA
V
IN
=7V, I
L
=0.1~500mA
V
IN
=5V, I
L
=0.1~500mA
V
IN
=5V, I
L
=0.1~500mA
V
IN
=5V, I
L
=0.1~500mA
V
IN
=5V, I
L
=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
ELECTRICAL CHARACTERISTICS
(Continued)
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
Dropout Voltage
(Note 4)
AIC1723s
AIC1723-52
AIC1723-50
AIC1723-38
AIC1723-37
AIC1723-35
AIC1723-33
I
L
=0.1mA
I
L
=500mA
I
L
=500mA
I
L
=500mA
I
L
=500mA
I
L
=500mA
I
L
=500mA
0.2
750
750
900
900
900
900
10
850
850
1050
1050
1050
1050
mV
Ground Current
I
O
=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.
TYPICAL PERFORMANCE CHARACTERISTICS
0
10
20
30
40
50
60
0
2
4
6
8
10
12
G
r
ound C
u
rr
ent (
A)
Input Voltage (V)
Ground Current vs. Input Voltage
O
u
tput C
u
rre
nt I
OU
T
(m
A)
Input Voltage V
IN
(V)
Recommended Max. Output Current v.s. Input Voltage
4
5
6
7
8
9
10
11
12
100
200
500
600
3V
5V
,
5.2V
400
300
3.3V
3.5V
3.7V, 3.8V
AIC1723
5
TYPICAL PERFORMANCE CHARACTERISTICS
(Continued)
Load Transient Response
Time (mS)
Load C
u
r
r
ent
(m
A
)
O
u
tput V
o
l
t
ag
e
(
m
V,
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
Line Regulation Response
Time (mS)
I
n
put V
o
l
t
age
(V
)
O
u
tput V
o
l
t
ag
e
(
m
V,
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
Load Transient Response
Time (mS)
Loa
d C
u
rr
ent
(m
A
)
Outp
ut V
o
lta
g
e
(
m
V,
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)
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
D
r
opou
t
V
o
l
t
age
(
m
V
)
BLOCK DIAGRAM
1.235V
Reference
GND
VOUT
VIN
ERROR
AMP
+
-
THERMAL
SHUTDOWN
-
+
CURRENT
LIMITING
AIC1723
6
PIN DESCRIPTION
VOUT PIN - Output pin.
GND PIN - Power GND.
VIN PIN
- Power Supply Input.
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
PHYSICAL DIMENSIONS
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
M
A
X
e
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
TO-251 (unit: mm)
SYMBOL
MIN
MAX
A
2.19
2.38
A1
1.02
1.27
b
0.55
0.89
b2
5.21
5.46
C
0.46
0.58
C1
0.46
0.58
D
5.33
5.59
E
6.35
6.73
e
2.28 (TYP.)
L
7.62 (TYP.)
e
b
C
A1
A
C1
L
D
b2
E
AIC1723
8
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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