AIC1722
300mA Low Dropout Linear Regulator
FEATURES
Low Dropout Voltage of 130mV at 100mA
Output Current (5.2V Output Version).
Guaranteed 300mA Output Current.
Internal 1.3Ω P-MOSFET Draws no Base
Current.
Low Ground Current at 55µA.
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 1µF for Stability.
Current and Thermal Limiting.
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 55µA, 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
to
built
the
in
to
provide
maximal
fault
protection
conditions.
The AIC1722 comes in the popular 3-pin
SOT-89 and TO-92 packages.
AIC1722
against
APPLICATIONS
Voltage Regulator for CD-ROM Drivers.
Voltage Regulator for LAN Cards.
Voltage Regulator for Microprocessor.
Wireless Communication Systems.
Battery Powered Systems.
TYPICAL APPLICATION CIRCUIT
VIN
V
IN
VOUT
AIC1722
V
OUT
+
1µF
C
IN
GND
+
10µF
C
OUT
Low Dropout Linear Regulator
Analog Integrations Corporation
DS-1722-01
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
1
AIC1722
ORDERING INFORMATION
AIC1722-XXXXX
PACKAGING TYPE
X : SOT-89
ZT : TO-92
ZL : TO-92
TEMPERATURE RANGE
C: 0°C~70°C
OUTPUT VOLTAGE
33: 3.3V
35: 3.5V
37: 3.7V
38: 3.8V
50: 5.0V
52: 5.2V
ORDER NUMBER
AIC1722-33CX
AIC1722-35CX
AIC1722-37CX
AIC1722-38CX
AIC1722-50CX
AIC1722-52CX
(SOT-89)
AIC1722-33CZT
AIC1722-35CZT
AIC1722-37CZT
AIC1722-38CZT
AIC1722-50CZT
AIC1722-52CZT
(TO-92 T TYPE)
AIC1722-33CZL
AIC1722-35CZL
AIC1722-37CZL
AIC1722-38CZL
AIC1722-50CZL
AIC1722-52CZT
(TO-92 L TYPE)
PIN CONFIGURATION
FRONT VIEW
1: VOUT
2: GND
3: VIN
1
2
3
TOP VIEW
1: GND
2: VIN
3: VOUT
1
2
3
TOP VIEW
1: VIN
2: GND
3: VOUT
1
2
3
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
SOT-89 Package
....…...….................
0.5W
TO-92 Package
.....………….............
0.5W
TEST CIRCUIT
Refer to the TYPICAL APPLICATION CIRCUIT
ELECTRICAL CHARACTERISTICS
otherwise specified.)
PARAMETER
No Load
AIC1722-52
AIC1722-50
AIC1722-38
AIC1722-37
AIC1722-35
AIC1722-33
(Ta=25°C, C
IN
=1µF, C
OUT
=10µF, unless
°
µ
µ
MIN.
5.100
4.900
3.725
3.625
3.430
3.235
TYP.
5.2
5.0
3.8
3.7
3.5
3.3
MAX.
5.300
5.100
3.875
3.775
3.570
3.365
UNIT
TEST CONDITIONS
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
Output Voltage
V
2
AIC1722
ELECTRICAL CHARACTERISTICS
PARAMETER
Output Voltage
Temperature
Coefficiency
(Note 1)
I
L
=1mA
AIC1722-52
AIC1722-50
AIC1722-38
AIC1722-37
AIC1722-35
AIC1722-33
AIC1722-52
AIC1722-50
AIC1722-38
AIC1722-37
AIC1722-35
AIC1722-33
AIC1722-52
AIC1722-50
AIC1722-38
AIC1722-37
AIC1722-35
AIC1722-33
AIC1722s
AIC1722-52
AIC1722-50
AIC1722-38
AIC1722-37
AIC1722-35
AIC1722-33
I
O
=0.1mA~I
MAX
AIC1722-52
AIC1722-50
AIC1722-38
AIC1722-37
AIC1722-35
AIC1722-33
(Continued)
TEST CONDITIONS
MIN.
TYP.
50
MAX.
150
UNIT
PPM/°C
Line Regulation
Load Regulation
(Note 2)
Current Limit
(Note 3)
Dropout Voltage
(Note 4)
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
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
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
I
L
=0.1mA
I
L
=300mA
I
L
=300mA
I
L
=300mA
I
L
=300mA
I
L
=300mA
I
L
=300mA
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
320
320
320
320
320
320
3
3
3
3
3
3
7
7
7
7
7
7
440
440
440
440
440
440
0.2
400
400
540
540
540
540
55
55
55
55
55
55
10
10
10
10
10
10
25
25
25
25
25
25
mV
mV
mA
10
500
500
640
640
640
640
80
80
80
80
80
80
mV
Ground Current
µA
Note 1:
Note 2:
Note 3:
Note 4:
Guaranteed by design.
Regulation is measured at constant junction temperature, using pulse testing with a low ON time.
Current limit is measured by pulsing a short time.
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.
3
AIC1722
TYPICAL PERFORMANCE CHARACTERISTICS
Output Voltage vs. Temperature
104
60
Ground Current vs. Input Voltage
Normalized Output Voltage (%)
50
Ground Current (
µ
A)
-40
0
0
50
100
125
103
40
100
30
20
98
10
96
0
0
2
4
6
8
10
12
Temperature (°C)
Input Voltage (V)
Dropout Voltage vs. Load Current
600
Ground Current vs. Temperature
60
58
500
V
OUT
=3.3V, 3.5V, 3.7V & 3.8V
Dropout Voltage (mV)
Ground Current (
µ
A)
400
56
I
L
=300mA
I
L
=150mA
300
54
200
52
I
L
=0.1mA
V
OUT
=5.0V & 5.2V
100
50
0
-50
-25
0
25
50
75
100
125
0
50
100
150
200
250
300
Temperature (°c)
Load Current (mA)
Line Transient Response
100
Load transient Response
Output Voltage
(mV, AC)
Load Current
(mA)
0.9
1.0
20
0
Output Voltage
(mV, AC)
50
0
-50
C
OUT
=1µF
I
L
=1mA
V
OUT
=5.2V
-20
-40
-60
150
0.1
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Input Voltage
(V)
8
6
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
Time (mS)
Time (mS)
4
AIC1722
TYPICAL PERFORMANCE CHARACTERISTICS
Load Transient Response
400
(Continued)
Recommended Max. Output Current v.s. Input Voltage
3.3V
3.5V
3.7V
3.8V
Out put Volt age
(mV, AC)
100
0
Output Current, I
OUT
(mA)
C
OUT
= 1
µ
F
V
OUT
= 5.2V
300
-100
-200
200
5V
5.2V
Load Current
(mA)
150
100
0.1
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
4
5
6
Time (mS)
Input Voltage V
IN
(V)
7
8
9
10
11
12
BLOCK DIAGRAM
VIN
VOUT
CURRENT
LIMITING
ERROR
AMP
THERMAL
SHUTDOWN
-
+
1.235V
Reference
-
GND
PIN DESCRIPTION
VOUT PIN - Output pin.
GND PIN - Power GND.
VIN PIN - Power Supply Input.
APPLICATION INFORMATIONS
A 1µF (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 5Ω 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 0.1µF 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).
5
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