AIC1722A
300mA Low Dropout Linear Regulator
FEATURES
Low Dropout Voltage of 470mV at 300mA Out-
put Current (3.0V Output Version).
Guaranteed 300mA Output Current.
Maximum Input Voltage is 8V
Low Ground Current at 55µA.
2% Accuracy Output Voltage of 1.8V/ 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
VOUT
VIN
V
IN
AIC1722A
V
OUT
+
1µF
C
IN
GND
+
1µF
C
OUT
Low Dropout Linear Regulator
(C
IN
and C
OUT
are electrolytic capacitor)
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-1722AP-01 070204
1
AIC1722A
SOT-89 MARKING
Part No.
AIC1722A-18XXA
AIC1722A-20XXA
AIC1722A-25XXA
AIC1722A-27XXA
AIC1722A-30XXA
AIC1722A-33XXA
AIC1722A-35XXA
AIC1722A-37XXA
AIC1722A-38XXA
AIC1722A-50XXA
AIC1722A-52XXA
CXA
AL18
AL20
AL25
AL27
AL30
AL33
AL35
AL37
AL38
AL50
AL52
PXA
AL18P
AL20P
AL25P
AL27P
AL30P
AL33P
AL35P
AL37P
AL38P
AL50P
AL52P
Part No.
AIC1722A-18XXT
AIC1722A-20XXT
AIC1722A-25XXT
AIC1722A-27XXT
AIC1722A-30XXT
AIC1722A-33XXT
AIC1722A-35XXT
AIC1722A-37XXT
AIC1722A-38XXT
AIC1722A-50XXT
AIC1722A-52XXT
CXT
BA18
BA20
BA25
BA27
BA30
BA33
BA35
BA37
BA38
BA50
BA52
PXT
BA18P
BA20P
BA25P
BA27P
BA30P
BA33P
BA35P
BA37P
BA38P
BA50P
BA52P
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
Power Dissipation
SOT-89 Package
....…...….................
0.5W
TO-92 Package
.....………….............
0.5W
SOT-23 Package.....…………............. 0.5W
Absolute Maximum Rating are those value beyond which the life of a device may be impaired.
TEST CIRCUIT
Refer to the TYPICAL APPLICATION CIRCUIT
3
AIC1722A
ELECTRICAL CHARACTERISTICS
erwise specified.)
(Note 1)
PARAMETER
(T
A
=25°C, C
IN
=1µF, C
OUT
=1µF, unless oth-
TEST CONDITIONS
No Load
AIC1722A-52
AIC1722A-50
AIC1722A-38
AIC1722A-37
AIC1722A-35
AIC1722A-33
AIC1722A-30
AIC1722A-27
AIC1722A-25
AIC1722A-20
AIC1722A-18
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
3.0V≤V
OUT
≤3.9V
2.5V≤V
OUT
≤2.9V
2.0V≤V
OUT
≤2.4V
1.4V≤V
OUT
≤1.9V
V
IN
=5~8V
V
IN
=7~8V
MIN.
TYP.
MAX.
UNIT
Output Voltage
V
IN
=8V
-2
+2
%
Line Regulation
Load Regulation
(Note 2)
Current Limit
(Note 3)
Dropout Voltage
(Note 4)
V
IN
=4V~8V
V
IN
=5.5V~8V
V
IN
=5V
V
IN
=7V
300
3
3
7
15
10
15
20
40
mV
mV
mA
I
L
=300mA
400
470
570
800
1260
55
55
80
80
mV
Ground Current
I
O
=0.1mA~I
MAX
1.4V≤V
OUT
≤3.9V
4.0V≤V
OUT
≤5.2V
µA
Note 1:
Note 2:
Note 3:
Note 4:
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).
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.
4
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