AIC1722A
300mA Low Dropout Linear Regulator
FEATURES
Low Dropout Voltage of 470mV at 300mA
Output Current (3.0V Output Version).
Guaranteed 300mA Output Current.
Maximum Input Voltage is 8V
Low Ground Current at 55µA.
2% Accuracy Output Voltage of 1.5V/1.8V/
2.0V /2.5V /2.7V/ 3.0V/ 3.3V/ 3.5V/ 3.7V/ 3.8V/
5.0V/ 5.2V.
Needs only 1µF for Stability.
Current and Thermal Limiting.
DESCRIPTION
The AIC1722A is a 3-pin low dropout linear
regulator. The superior characteristics of the
AIC1722A 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 300mA output current is exceptionally low.
Output current limiting and thermal limiting are
built in to provide maximal protection to the
AIC1722A against fault conditions.
The AIC1722A comes in the popular 3-pin
SOT-89, TO-92 and SOT-23 packages.
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
AIC1722A
V
OUT
+
C
IN
1µF
GND
+
C
OUT
1µF
(Note1)
Low Dropout Linear 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-1722AG-02 030807
1
AIC1722A
ORDERING INFORMATION
AIC1722A-XXXXX XX
PACKING TYPE
TR: TAPE & REEL
BG: BAG
PACKAGE TYPE
U: SO T-23
XA: SO T-89
XT: SO T-89
ZT: TO -92
ZL: TO -92
P: Lead Free Comm ercial
G: Green Package
OUTP UT VOLTAGE
15: 1.5V
18: 1.8V
20: 2.0V
25: 2.5V
27: 2.7V
30: 3.0V
33: 3.3V
35: 3.5V
37: 3.7V
38: 3.8V
50: 5.0V
52: 5.2V
PIN CONFIGURATION
SOT-23
TOP VIEW
1: GND
2: VOUT
3: VIN
1
3
2
SOT-89
TOP VIEW
1: GND
2. VIN
3. VOUT
SOT-89
TOP VIEW
1: VOUT
2. GND
3. VIN
TO-92
TOP VIEW
1: GND
2. VIN
3. VOUT
TO-92
TOP VIEW
1: VIN
2. GND
3. VOUT
1
2
3
1
2
3
1
2
3
1
2
3
Example:
AIC1722A-18P XATR
1.8V Version, in SOT-89 Package &
Tape & Reel Packing Type(lead free)
AIC1722A-18G XATR
1.8V Version, in SOT-89 Lead F ree
Package & Tape & Reel Packing Type
(green)
SOT-23 MARKING
Part No.
AIC1722A-15XU
AIC1722A-18XU
AIC1722A-20XU
AIC1722A-25XU
AIC1722A-27XU
AIC1722A-30XU
PU
BN15P
BN18P
BN20P
BN25P
BN27P
BN30P
Part No.
AIC1722A-33XU
AIC1722A-35XU
AIC1722A-37XU
AIC1722A-38XU
AIC1722A-50XU
AIC1722A-52XU
PU
BN33P
BN35P
BN37P
BN38P
BN50P
BN52P
2
AIC1722A
SOT-89 MARKING
Part No.
AIC1722A-15XXA
AIC1722A-18XXA
AIC1722A-20XXA
AIC1722A-25XXA
AIC1722A-27XXA
AIC1722A-30XXA
AIC1722A-33XXA
AIC1722A-35XXA
AIC1722A-37XXA
AIC1722A-38XXA
AIC1722A-50XXA
AIC1722A-52XXA
PXA
AL15P
AL18P
AL20P
AL25P
AL27P
AL30P
AL33P
AL35P
AL37P
AL38P
AL50P
AL52P
GXA
AL15G
AL18G
AL20G
AL25G
AL27G
AL30G
AL33G
AL35G
AL37G
AL38G
AL50G
AL52G
Part No.
AIC1722A-15XXT
AIC1722A-18XXT
AIC1722A-20XXT
AIC1722A-25XXT
AIC1722A-27XXT
AIC1722A-30XXT
AIC1722A-33XXT
AIC1722A-35XXT
AIC1722A-37XXT
AIC1722A-38XXT
AIC1722A-50XXT
AIC1722A-52XXT
PXT
BA15P
BA18P
BA20P
BA25P
BA27P
BA30P
BA33P
BA35P
BA37P
BA38P
BA50P
BA52P
GXT
BA15G
BA18G
BA20G
BA25G
BA27G
BA30G
BA33G
BA35G
BA37G
BA38G
BA50G
BA52G
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage
...................................................…………..…….................. -0.3~8V
Operating Temperature Range
…………….....………........…………................ -40°C~
85°C
Junction Temperature
……………………………………………………………………...
125°C
Storage Temperature Range
....................……......................……….............
-65°C~150°C
Lead Temperature (Soldering. 10sec)
……………………………………………………
260°C
Thermal Resistance Junction to Case
SOT-23……………………………….130°C /W
SOT-89…..………………..…………..30°C /W
TO-92…………………………………120°C /W
Thermal Resistance Junction to Ambient
(Assume no ambient airflow, no heatsink)
SOT-23..………………………………180°C /W
SOT-89………………………………. 160°C /W
TO-92…………………………………150°C /W
Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
TEST CIRCUIT
Refer to the TYPICAL APPLICATION CIRCUIT.
3
AIC1722A
ELECTRICAL CHARACTERISTICS
otherwise specified.) (Note 2)
PARAMETER
Output Voltage
(T
A
=25°C, C
IN
=1µF, C
OUT
=1µF, unless
TEST CONDITIONS
V
IN
=8V, No Load
I
L
=
1mA,
1.4V≤V
OUT
≤3.2V
3.3V≤V
OUT
≤5.2V
I
L
=0.1~300mA
1.4V≤V
OUT
≤3.9V
4.0V≤V
OUT
≤5.2V
V
IN
=7V, V
OUT
=0V
4.0V≤V
OUT
≤5.2V
V
IN
=5V
V
IN
=7V
V
IN
=4V~8V
V
IN
=5.5V~8V
MIN.
-2
TYP.
MAX.
+2
UNIT
%
Line Regulation
3
3
7
15
300
400
470
570
800
1260
55
55
20
10
15
20
40
mV
Load Regulation
(Note 3)
Current Limit
(Note 4)
mV
mA
500
570
670
900
1360
80
80
mV
Dropout Voltage
(Note 5)
3.0V≤V
OUT
≤3.9V
I
L
=300mA
2.5V≤V
OUT
≤2.9V
2.0V≤V
OUT
≤2.4V
1.4V≤V
OUT
≤1.9V
I
O
=0.1mA~I
MAX
Ground Current
Thermal Shutdown
Hysteresis
1.4V≤V
OUT
≤3.9V
4.0V≤V
OUT
≤5.2V
Guaranteed by design
V
IN
=5~8V
V
IN
=7~8V
µA
ºC
Note 1: To avoid output oscillation, aluminum electrolytic output capacitor is recommended and ceramic
capacitor is not suggested.
Note 2: Specifications are production tested at T
A
=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).
Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low ON time.
Note 4: Current limit is measured by pulsing a short time.
Note 5: 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.
4
AIC1722A
TYPICAL PERFORMANCE CHARACTERISTICS
2.00
1.95
1.90
1.85
AIC1722A-18
2.52
AIC1722A-25
2.51
2.50
2.49
2.48
2.47
2.46
-40
V
OUT
(V)
1.80
1.75
1.70
1.65
1.60
-40
-20
0
20
40
o
60
80
100
V
OUT
(V)
-20
0
20
40
60
80
100
Temperature ( C)
Fig. 1 V
OUT
vs. Temperature
Temperature (°C)
Fig. 2 V
OUT
vs. Temperature
3.40
AIC1722A-33
3.35
5.30
AIC1722A-52
5.25
V
OUT
(V)
V
OUT
(V)
3.30
3.25
3.20
5.20
5.15
3.15
3.10
-40
-20
0
20
40
60
80
100
5.10
-40
-20
0
20
40
60
80
100
Temperature (°C)
Fig. 3 V
OUT
vs. Temperature
Temperature (°C)
Fig. 4 V
OUT
vs. Temperature
60
70
AIC1722A-18
AIC1722A-25
Ground Current(µA)
58
56
54
52
50
48
46
44
42
40
-40
-20
0
20
I
LOAD
=0mA
Ground Current
(µA)
65
I
LOAD
=100mA
60
I
LOAD
=0mA
55
I
LOAD
=300mA
50
I
LOAD
=100mA
40
60
80
I
LOAD
=300mA
45
-40
-20
0
20
40
60
80
Temperature(°C)
Fig. 5 Ground Current vs. Temperature
Temperature (°C)
Fig. 6 Ground Current vs. Temperature
5
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