AIC1734
300mA Low Dropout Linear Regulator
FEATURES
Low Dropout Voltage of 470mV at 300mA Out-
put Current (3.0V Output Version).
Guaranteed 300mA Output Current.
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.
Only needs 1µF Output Capacitor for Stability.
Current and Thermal Limiting.
DESCRIPTION
The AIC1734 is a 3-pin low dropout linear
regulator. The superior characteristics of the
AIC1734 include zero base current loss, very
low dropout voltage, and 2% accuracy output
voltage. Typical ground current remains ap-
proximately 55
µ
A, for loading ranging from
zero to maximum. Dropout voltage at 300mA
output current is exceptionally low. Built-in
output current limiting and thermal limiting
provide maximal protection to the AIC1734
against fault conditions.
The AIC1734 is available in popular SOT-23,
SOT-89 and TO-92 packages.
APPLICATIONS
CD-ROM Drivers.
LAN Cards.
Microprocessor.
RAM Module.
Wireless Communication Systems.
Battery Powered Systems.
TYPICAL APPLICATION CIRCUIT
VOUT
VIN
V
IN
AIC1734
V
OUT
+
1µF
C
IN
GND
+
1µF
C
OUT
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-1734P-04 010405
1
AIC1734
SOT-89 MARKING
Part No.
AIC1734-18XXA
AIC1734-20XXA
AIC1734-25XXA
AIC1734-27XXA
AIC1734-30XXA
AIC1734-33XXA
AIC1734-35XXA
AIC1734-37XXA
AIC1734-38XXA
AIC1734-50XXA
AIC1734-52XXA
CXA
CA18
CA20
CA25
CA27
CA30
CA33
CA35
CA37
CA38
CA50
CA52
PXA
CA18P
CA20P
CA25P
CA27P
CA30P
CA33P
CA35P
CA37P
CA38P
CA50P
CA52P
Part No.
AIC1734-18XXT
AIC1734-20XXT
AIC1734-25XXT
AIC1734-27XXT
AIC1734-30XXT
AIC1734-33XXT
AIC1734-35XXT
AIC1734-37XXT
AIC1734-38XXT
AIC1734-50XXT
AIC1734-52XXT
CXT
CB18
CB20
CB25
CB27
CB30
CB33
CB35
CB37
CB38
CB50
CB52
PXT
CB18P
CB20P
CB25P
CB27P
CB30P
CB33P
CB35P
CB37P
CB38P
CB50P
CB52P
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temperature
Lead Temperature (Soldering) 10 sec.
Thermal Resistance Junction to Ambient
(Assume no Ambient Airflow, no Heatsink)
SOT-89 Package
TO-92 Package
SOT-23 Package
-0.3
~12V
-40°C~ 85°C
-65°C~150°C
125°C
260°C
160°C/W
150°C/W
180°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
AIC1734
ELECTRICAL CHARACTERISTICS
erwise specified.)
PARAMETER
(T
A
=25°C, C
IN
=1µF, C
OUT
=1µF, unless oth-
TEST CONDITIONS
No Load
AIC1734-52
AIC1734-50
AIC1734-38
AIC1734-37
AIC1734-35
AIC1734-33
AIC1734-30
AIC1734-27
AIC1734-25
AIC1734-20
AIC1734-18
(Note 1)
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
=5~12V
V
IN
=7~12V
V
IN
=4V~12V
V
IN
=5.5V~12V
V
IN
=5V
V
IN
=7V
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
=4.0~12V
V
IN
=4.0~12V
V
IN
=4.0~12V
V
IN
=4.0~12V
V
IN
=4.0~12V
V
IN
=4.0~12V
MIN.
5.100
4.900
3.725
3.625
3.430
3.235
2.940
2.646
2.450
1.960
1.764
TYP.
5.200
5.000
3.800
3.700
3.500
3.300
3.000
2.700
2.500
2.000
1.800
50
3
3
7
15
MAX.
5.300
5.100
3.875
3.775
3.570
3.365
3.060
2.754
2.550
2.040
1.836
UNIT
Output Voltage
V
Output Voltage Tem-
perature Coefficiency
Line Regulation
Load Regulation
(Note 2)
Current Limit
(Note 3)
Dropout Voltage
(Note 4)
PPM/°C
10
10
20
40
mV
mV
mA
300
400
470
570
800
1260
55
55
80
80
I
L
=300mA
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:
Note5:
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.
Specifications are guaranteed by Statistical Quality Controls (SQC), with no production test proved,
when operating temperature ranges from -40°C to 85°C.
4
AIC1734
TYPICAL PERFORMANCE CHARACTERISTICS
5.40
5.35
5.30
3.50
AIC1734-52
3.45
3.40
AIC1734-33
V
OUT
(V)
V
OUT
(V)
5.25
5.20
5.15
5.10
5.05
5.00
-50
-30
-10
10
30
50
70
90
3.35
3.30
3.25
3.20
3.15
3.10
-50
-30
-10
10
30
50
70
90
Temperature (°C)
Temperature (°C)
Fig. 1
50
V
OUT
vs. Temperature
48
Fig. 2
V
OUT
vs. Temperature
AIC1734-52
AIC1734-33
Ground Current (µA)
46
44
42
40
Ground Current (µA)
48
I
LOAD
=300mA
46
I
LOAD
=300mA
44
42
I
LOAD
=100mA
I
LOAD
= 0mA
0
10 20 30 40 50 60 70 80 90
40
I
LOAD
=100mA
I
LOAD
= 0mA
38
-40 -30 -20 -10
38
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80 90
Temperature (°C)
Temperature (°C)
Fig. 3
60
Ground Current vs. Temperature
60
Fig. 4
Ground Current vs. Temperature
AIC1734-52
AIC1734-33
Ground Current (µA)
40
30
20
10
0
Ground Current (µA)
0
1
2
3
4
5
6
7
8
9
10
11
12
50
50
40
30
20
10
0
V
IN
(V)
0
1
2
3
4
V
IN
(V)
5
6
7
8
9
10
11
12
Fig. 5
Ground Current vs. V
IN
Fig. 6
Ground Current vs. V
IN
5
PCB Design
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