AIC1722
300mA 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-1722-01
TEL: 886-3-5772500
FAX: 886-3-5772510
1
FEATURES
Low Dropout Voltage of 130mV at 100mA
Output Current (5.2V Output Version).
Guaranteed 300mA Output Current.
Internal 1.3
P-MOSFET Draws no Base
Current.
Low Ground Current at 55
A.
2% Accuracy Output Voltage of 3.3V/ 3.5V/
3.7V/ 3.8V/ 5.0V/ 5.2V.
Input Voltage Range up to 12V.
Needs only 1
F for Stability.
Current and Thermal Limiting.
APPLICATIONS
Voltage Regulator for CD-ROM Drivers.
Voltage Regulator for LAN Cards.
Voltage Regulator for Microprocessor.
Wireless Communication Systems.
Battery Powered Systems.
DESCRIPTION
The AIC1722 is a 3-pin low dropout linear
regulator. The superior characteristics of the
AIC1722 include zero base current loss, very
low dropout voltage, and 2% accuracy output
voltage. Typical ground current remains
approximately 55
A, from no load to maximum
loading conditions. Dropout voltage at 100mA
output current is exceptionally low: 130mV for
the AIC1722-50 and AIC1722-52, 180mV for
the AIC1722-33, AIC1722-35, and AIC1722-37
AIC1722-38. Output current limiting and thermal
limiting are built in to provide maximal
protection to the AIC1722 against fault
conditions.
The AIC1722 comes in the popular 3-pin
SOT-89 and TO-92 packages.
TYPICAL APPLICATION CIRCUIT
+
+
AIC1722
10
F
C
OUT
V
OUT
VOUT
GND
VIN
1
F
C
IN
V
IN
Low Dropout Linear Regulator
AIC1722
2
ORDERING INFORMATION
ORDER NUMBER
AIC1722-33CX
AIC1722-35CX
AIC1722-37CX
AIC1722-50CX
AIC1722-52CX
(SOT-89)
AIC1722-33CZT
AIC1722-35CZT
AIC1722-37CZT
AIC1722-38CZT
AIC1722-50CZT
(TO-92 T TYPE)
AIC1722-33CZL
AIC1722-35CZL
AIC1722-37CZL
AIC1722-38CZL
AIC1722-50CZL
(TO-92 L TYPE)
PIN CONFIGURATION
PACKAGING TYPE
X : SOT-89
ZT : TO-92
ZL : TO-92
TEMPERATURE RANGE
C: 0
C~70C
OUTPUT VOLTAGE
33: 3.3V
35: 3.5V
37: 3.7V
50: 5.0V
52: 5.2V
AIC1722-XXXXX
FRONT VIEW
1: VOUT
2: GND
3: VIN
1
2
3
1
2
3
TOP VIEW
1: GND
2: VIN
3: VOUT
TOP VIEW
1: VIN
2: GND
3: VOUT
1
2
3
38: 3.8V
AIC1722-38CX
AIC1722-52CZT
AIC1722-52CZT
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage ......................................................................................... -0.3~12V
Operating Junction Temperature Range .................................................. -40
C~ 125C
Storage Temperature Range ....................................................................... -65
C~150C
Power Dissipation
SOT-89 Package .............................. 0.5W
TO-92
Package .............................. 0.5W
TEST CIRCUIT
Refer to the TYPICAL APPLICATION CIRCUIT
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
AIC1722-52
AIC1722-50
AIC1722-38
AIC1722-37
AIC1722-35
AIC1722-33
V
IN
=5.5~12V
V
IN
=5.5~12V
V
IN
=4.1~12V
V
IN
=4.0~12V
V
IN
=4.0~12V
V
IN
=3.6~12V
5.100
4.900
3.725
3.625
3.430
3.235
5.2
5.0
3.8
3.7
3.5
3.3
5.300
5.100
3.875
3.775
3.570
3.365
V
AIC1722
3
ELECTRICAL CHARACTERISTICS
(Continued)
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
Output Voltage
Temperature
Coefficiency
(Note 1)
50
150
PPM/
C
Line Regulation
I
L
=1mA
AIC1722-52
AIC1722-50
AIC1722-38
AIC1722-37
AIC1722-35
AIC1722-33
V
IN
=5.5~12V
V
IN
=5.5~12V
V
IN
=4.1~12V
V
IN
=4.0~12V
V
IN
=4.0~12V
V
IN
=3.6~12V
3
3
3
3
3
3
10
10
10
10
10
10
mV
Load Regulation
(Note 2)
AIC1722-52
AIC1722-50
AIC1722-38
AIC1722-37
AIC1722-35
AIC1722-33
V
IN
=7V, I
L
=0.1~300mA
V
IN
=7V, I
L
=0.1~300 mA
V
IN
=5V, I
L
=0.1~300mA
V
IN
=5V, I
L
=0.1~300mA
V
IN
=5V, I
L
=0.1~300mA
V
IN
=5V, I
L
=0.1~300mA
7
7
7
7
7
7
25
25
25
25
25
25
mV
Current Limit
(Note 3)
AIC1722-52
AIC1722-50
AIC1722-38
AIC1722-37
AIC1722-35
AIC1722-33
V
IN
=7V, V
OUT
=0V
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
320
320
320
320
320
320
440
440
440
440
440
440
mA
Dropout Voltage
(Note 4)
AIC1722s
AIC1722-52
AIC1722-50
AIC1722-38
AIC1722-37
AIC1722-35
AIC1722-33
I
L
=0.1mA
I
L
=300mA
I
L
=300mA
I
L
=300mA
I
L
=300mA
I
L
=300mA
I
L
=300mA
0.2
400
400
540
540
540
540
10
500
500
640
640
640
640
mV
Ground Current
I
O
=0.1mA~I
MAX
AIC1722-52
AIC1722-50
AIC1722-38
AIC1722-37
AIC1722-35
AIC1722-33
V
IN
=5.5~12V
V
IN
=5.5~12V
V
IN
=4~12V
V
IN
=4~12V
V
IN
=4~12V
V
IN
=4~12V
55
55
55
55
55
55
80
80
80
80
80
80
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.
AIC1722
4
TYPICAL PERFORMANCE CHARACTERISTICS
Output Voltage vs. Temperature
Norm
al
i
z
ed Out
put
V
o
l
t
age
(%
)
Temperature (
C)
0
50
100
96
98
100
103
104
0
-40
125
Ground Current vs. Input Voltage
Ground Current
(
A)
Input Voltage (V)
0
10
20
30
40
50
60
0
2
4
6
8
10
12
Ground Current vs. Temperature
Ground Current
(
A)
Temperature (
c)
125
0
25
50
75
100
-25
-50
50
52
54
56
58
60
I
L
=300mA
I
L
=150mA
I
L
=0.1mA
Dropout Voltage vs. Load Current
Dropout
V
o
l
t
age (
m
V
)
Load Current (mA)
600
0
50
100
150
200
250
300
0
100
200
300
400
500
V
OUT
=5.0V & 5.2V
V
OUT
=3.3V, 3.5V, 3.7V & 3.8V
Line Transient Response
Time (mS)
O
u
tput V
o
l
t
ag
e
(
m
V,
AC
)
0
100
8
6
C
OUT
=1
F
I
L
=1mA
V
OUT
=5.2V
I
n
put V
o
l
t
age
(V
)
50
0
-50
0.5
0.1
0.4
0.2
0.3
1.0
0.6
0.9
0.7
0.8
Load transient Response
Time (mS)
O
u
tput V
o
l
t
ag
e
(
m
V,
AC
)
0
-40
150
0.1
Load C
u
r
r
ent
(m
A
)
20
0
-20
2.5
0.5
2.0
1.0
1.5
5.0
3.0
4.5
3.5
4.0
-60
AIC1722
5
TYPICAL PERFORMANCE CHARACTERISTICS
(Continued)
Load Transient Response
Time (mS)
Lo
ad
C
u
r
r
e
n
t
(m
A
)
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
100
0
-100
150
0.1
C
OUT
= 1F
V
OUT
= 5.2V
-200
O
u
t
put
V
o
l
t
a
g
e
(m
V
,
A
C
)
Ou
tp
u
t
C
u
rr
e
n
t
,
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
0
100
200
300
400
3.3V
3.5V
3.7V
3.8V
5V
5.2V
BLOCK DIAGRAM
1.235V
Reference
GND
VOUT
VIN
ERROR
AMP
-
THERMAL
SHUTDOWN
-
+
CURRENT
LIMITING
PIN DESCRIPTION
VOUT PIN - Output pin.
GND PIN - Power GND.
VIN PIN
- Power Supply Input.
APPLICATION INFORMATIONS
A 1
F (or greater) capacitor is required between
the AIC1722 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 AIC1722 input to ground if the lead
inductance between the input and power source
exceeds 500nH (approximately 10 inches of trace).
PDF 
ZIP