AIC1734
300mA Low Dropout Linear Regulator
Analog Integrations Corporation
Si-Soft Research Center
DS-1734P-04 010405
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
1
FEATURES
Low Dropout Voltage of 470mV at 300mA Out-
put Current (3.0V Output Version).
Guaranteed 300mA Output Current.
Low Ground Current at 55
A.
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 1
F Output Capacitor for Stability.
Current and Thermal Limiting.
APPLICATIONS
CD-ROM Drivers.
LAN Cards.
Microprocessor.
RAM Module.
Wireless Communication Systems.
Battery Powered Systems.
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
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.
TYPICAL APPLICATION CIRCUIT
+
+
AIC1734
1
F
C
OUT
V
OUT
VOUT
GND
VIN
1
F
C
IN
V
IN
Low Dropout Linear Regulator
AIC1734
ORDERING INFORMATION
PIN CONFIGURATION
SOT-89 (CXT & PXT)
TOP VIEW
1: VOUT
2. GND
3. VIN
SOT-89 (CXA & PXA)
TOP VIEW
1: GND
2. VIN
3. VOUT
TO-92 (CZT & PZT)
TOP VIEW
1: GND
2. VIN
3. VOUT
TO-92 (CZL & PZL)
TOP VIEW
1: VIN
2. GND
3. VOUT
1
2
3
1
2
3
1
2
3
1
2
3
PACKING TYPE
TR: TAPE & REEL
BG: BAG
PACKAGE TYPE
U: SOT-23
XA: SOT-89
XT: SOT-89
ZT:
TO-92
ZL: TO-92
C: Commercial
P: Lead Free Commercial
OUTPUT VOLTAGE
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
AIC1734-XXXXX XX
Example: AIC1734-18CXATR
1.8V Version, in SOT-89 Package &
Tape & Reel Packing Type
AIC1734-18PXATR
1.8V Version, in SOT-89 Lead Free
Package & Tape & Reel Packing Type
SOT-23 (CU & PU)
TOP VIEW
1: GND
2: VOUT
3: VIN
3
1
2
SOT-23 MARKING
Part No.
CU
PU
Part No.
CU
PU
AIC1734-18XU CD18
CD18P AIC1734-35XU
CD35
CD35P
AIC1734-20XU CD20
CD20P AIC1734-37XU
CD37
CD37P
AIC1734-25XU CD25
CD25P AIC1734-38XU
CD38
CD38P
AIC1734-27XU CD27
CD27P AIC1734-50XU
CD50
CD50P
AIC1734-30XU CD30
CD30P AIC1734-52XU
CD52
CD52P
AIC1734-33XU CD33
CD33P
2
AIC1734
SOT-89 MARKING
Part No.
CXA
PXA
Part No.
CXT
PXT
AIC1734-18XXA CA18 CA18P
AIC1734-18XXT CB18 CB18P
AIC1734-20XXA CA20 CA20P
AIC1734-20XXT CB20 CB20P
AIC1734-25XXA CA25 CA25P
AIC1734-25XXT CB25 CB25P
AIC1734-27XXA CA27 CA27P
AIC1734-27XXT CB27 CB27P
AIC1734-30XXA CA30 CA30P
AIC1734-30XXT CB30 CB30P
AIC1734-33XXA CA33 CA33P
AIC1734-33XXT CB33 CB33P
AIC1734-35XXA CA35 CA35P
AIC1734-35XXT CB35 CB35P
AIC1734-37XXA CA37 CA37P
AIC1734-37XXT CB37 CB37P
AIC1734-38XXA CA38 CA38P
AIC1734-38XXT CB38 CB38P
AIC1734-50XXA CA50 CA50P
AIC1734-50XXT CB50 CB50P
AIC1734-52XXA CA52 CA52P
AIC1734-52XXT CB52 CB52P
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage
-0.3
~12V
Operating Temperature Range
-40
C~ 85C
Storage Temperature Range -65
C~150C
Maximum Junction Temperature 125
C
Lead Temperature (Soldering) 10 sec. 260
C
Thermal Resistance Junction to Ambient
SOT-89 Package
160
C/W
(Assume no Ambient Airflow, no Heatsink) TO-92 Package
150
C/W
SOT-23
Package
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
(T
A
=25
C, C
IN
=1
F, C
OUT
=1
F, unless oth-
erwise specified.)
PARAMETER TEST
CONDITIONS
MIN.
TYP.
MAX.
UNIT
No
Load
Output Voltage
AIC1734-52
AIC1734-50
AIC1734-38
AIC1734-37
AIC1734-35
AIC1734-33
AIC1734-30
AIC1734-27
AIC1734-25
AIC1734-20
AIC1734-18
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
5.100
4.900
3.725
3.625
3.430
3.235
2.940
2.646
2.450
1.960
1.764
5.200
5.000
3.800
3.700
3.500
3.300
3.000
2.700
2.500
2.000
1.800
5.300
5.100
3.875
3.775
3.570
3.365
3.060
2.754
2.550
2.040
1.836
V
Output Voltage Tem-
perature Coefficiency
(Note 1)
50
PPM/
C
Line Regulation
I
L
=
1mA,
1.4V
V
OUT
3.2V
3.3V
V
OUT
5.2V
V
IN
=4V~12V
V
IN
=5.5V~12V
3
3
10
10
mV
Load Regulation
(Note 2)
I
L
=0.1~300mA
1.4V
V
OUT
3.9V
4.0V
V
OUT
5.2V
V
IN
=5V
V
IN
=7V
7
15
20
40
mV
Current Limit
(Note 3)
V
IN
=7V, V
OUT
=0V 300
mA
Dropout Voltage
(Note 4)
I
L
=300mA
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
400
470
570
800
1260
mV
Ground Current
I
O
=0.1mA~I
MAX
1.4V
V
OUT
3.9V
4.0V
V
OUT
5.2V
V
IN
=5~12V
V
IN
=7~12V
55
55
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.
Note5:
Specifications are guaranteed by Statistical Quality Controls (SQC), with no production test proved,
when operating temperature ranges from -40
C to 85C.
4
AIC1734
TYPICAL PERFORMANCE CHARACTERISTICS
5.00
5.05
5.10
5.15
5.20
5.25
5.30
5.35
5.40
Fig. 1 V
OUT
vs. Temperature
V
OUT
(V)
Temperature (
C)
-50
-30
-10
10
30
50
70
90
AIC1734-52
Fig. 2 V
OUT
vs. Temperature
V
OU
T
(V)
-50
-30
-10
10
30
50
70
90
3.10
3.15
3.20
3.25
3.30
3.35
3.40
3.45
3.50
Temperature (
C)
AIC1734-33
Fig. 3 Ground Current vs. Temperature
-40
-30
-20
-10
0
10 20
30
40
50
60 70 80 90
38
40
42
44
46
48
50
I
LOAD
= 0mA
I
LOAD
=100mA
I
LOAD
=300mA
G
r
ound
Cur
r
ent (
A)
Temperature (
C)
AIC1734-52
Fig. 4 Ground Current vs. Temperature
G
r
ound
Cur
r
ent (
A)
Temperature (
C)
-40 -30 -20 -10 0
10
20
30
40
50
60 70 80 90
38
40
42
44
46
48
I
LOAD
= 0mA
I
LOAD
=100mA
I
LOAD
=300mA
AIC1734-33
Fig. 5 Ground Current vs. V
IN
G
r
ound
Cur
r
ent (
A)
V
IN
(V)
0
1
2
3
4
5
6
7
8
9
10
11
12
0
10
20
30
40
50
60
AIC1734-52
Fig. 6 Ground Current vs. V
IN
G
r
ound
Cur
r
ent (
A)
V
IN
(V)
0
1
2
3
4
5
6
7
8
9
10
11
12
0
10
20
30
40
50
60
AIC1734-33
5
AIC1734
TYPICAL PERFORMANCE CHARACTERISTIC
(Continued)
Fig. 7 V
DROP
vs. I
LOAD
V
DR
OP
(m
V)
I
LOAD
(mA)
0
50
100
150
200
250
300
350
400
0
50
100
150
200
250
300
350
400
450
500
T=-40
C
T= 20
C
T= 50
C
T= 80
C
AIC1734-52
Fig. 8 V
DROP
vs. I
LOAD
V
DR
OP
(m
V
)
I
LOAD
(mA)
0
50
100
150
200
250
300
350
400
0
100
200
300
400
500
600
T= 20
C
T=-40
C
T= 50
C
T= 80
C
AIC1734-33
Fig. 9 Current Limit vs. Temperature
-40
-20
0
20
40
60
80
400
410
420
430
440
450
460
470
480
490
500
V
IN
= 7V
V
IN
= 8V
V
IN
= 6V
V
IN
= 5V
C
rrent Limit
(mA)
Temperature (
C)
AIC1734
6
AIC1734
BLOCK DIAGRAM
1.235V
Reference
GND
VOUT
VIN
ERROR
AMP
+
-
THERMAL
SHUTDOWN
-
+
CURRENT
LIMITING
PIN DESCRIPTIONS
VOUT PIN - Output pin.
GND PIN - Power GND.
VIN PIN - Power Supply Input.
7
AIC1734
PHYSICAL DIMENSIONS
(unit: mm)
SOT-23
0
0.90
0.30
1.50
2.60
2.80
0.08
0.30
0.05
e
L1
L
e1
c
E
E1
D
b
A2
A1
0.95 BSC
8
0.60
1.90 BSC
0.60 REF
1.30
1.70
3.00
3.00
0.22
0.50
0.15
0.95
MIN.
S
Y
M
B
O
L
A
1.45
MAX.
SOT-23
MILLIMETERS
c
A
A2
b
WITH PLATING
0.2
5
A1
SECTION A-A
BASE METAL
e1
e
D
E
A
A
E1
SEE VIEW B
VIEW B
L1
L
SEATING PLANE
GAUGE PLANE
SOT-89
A
C
e1
e
D
D1
H
E
L
0.36
3.94
2.29
1.50
4.40
0.35
0.44
e1
H
D
E
e
D1
C
B1
B
3.00 BSC
4.25
0.48
2.60
1.83
4.60
0.44
0.56
1.50 BSC
1.40
MIN.
S
Y
M
B
O
L
A
1.60
MAX.
SOT-89
MILLIMETERS
0.89
L
1.20
B
B1
8
AIC1734
9
MILLIMETERS
TO-92
MAX.
5.33
A
S
Y
M
B
O
L
MIN.
4.32
0.47
4.19
2.66
1.39
5.20
2.66
b
D
E
e1
L
j
e
S
0.36
3.18
2.42
1.15
3.43
12.70
4.45
2.03
TO-92
Note:
Information provided by AIC is believed to be accurate and reliable. However, we cannot assume responsibility for use of any
circuitry other than circuitry entirely embodied in an AIC product; nor for any infringement of patents or other rights of third par-
ties that may result from its use. We reserve the right to change the circuitry and specifications without notice.
Life Support Policy: AIC does not authorize any AIC product for use in life support devices and/or systems. Life support devices
or systems are devices or systems which, (I) are intended for surgical implant into the body or (ii) support or sustain life, and
whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably
expected to result in a significant injury to the user.
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