AIC1737
LOW OUTPUT VOLTAGE, 300mA LOW DROPOUT LINEAR REGULATOR
SPEC NO: DS-1737-00 08/06/00
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510
1
FEATURES
Low Dropout Voltage of 180mV at 100mA Output
Current (3.0V Output Version).
Guaranteed 300mA Output Current.
Internal 1.3
P-MOSFET Draws no Base Current.
Low Ground Current at 55
A.
2% Accuracy Output Voltage of 1.8V/ 2.0V/ 2.5V/
2.7V/ 3.0V.
Input Voltage Range up to 12V.
Needs only 1
F for Stability.
Current and Thermal Limiting.
APPLICATIONS
Voltage Regulator for CD-ROM Drivers.
Voltage Regulator for LAN Cards.
Voltage Regulator for Microprocessor.
Wireless Communication Systems.
Battery Powered Systems.
DESCRIPTION
The AIC1737 is a 3-pin low dropout linear
regulator. The superior characteristics of the
AIC1737 include zero base current loss, very low
dropout voltage, and 2% accuracy output voltage.
Typical ground current remains approximately 55
A, from no load to maximum loading conditions.
Dropout voltage is exceptionally low. Output
current limiting and thermal limiting are built in to
provide maximal protection to the AIC1737
against fault conditions.
The AIC1737 comes in the popular 3-pin SOT-89
packages.
TYPICAL APPLICATION CIRCUIT
+
+
AIC1737
10
F
C
OUT
V
OUT
VOUT
GND
VIN
V
IN
1
F
C
IN
Low Dropout Linear Regulator
AIC1737
LOW OUTPUT VOLTAGE, 300mA LOW DROPOUT LINEAR REGULATOR
SPEC NO: DS-1737-00 08/06/00
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510
2
ORDERING INFORMATION
PACKAGING TYPE
X:
SOT89
OUTPUT VOLTAGE
18: 1.8V
20: 2.0V
25: 2.5V
27: 2.7V
30: 3.0V
AIC1737-XCX
ORDER NUMBER
AIC1737-18CX
AIC1737-20CX
AIC1737-25CX
AIC1737-27CX
AIC1737-30CX
(SOT-89)
PIN CONFIGURATION
FRONT VIEW
1. GND
2: IN
3: OUT
1
2
3
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage ......................................................................................... -0.3~12V
Operating Junction Temperature Range .................................................. -40
C~ 85
C
Storage Temperature Range ....................................................................... -65
C~150
C
Power Dissipation
SOT-89 Package .............................. 0.5W
TEST CIRCUIT
Refer to the TYPICAL APPLICATION CIRCUIT
ELECTRICAL CHARACTERISTICS
(Ta=25
C, C
IN
=1
F, C
OUT
=10
F, unless otherwise
specified.)
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
Output Voltage
No Load
AIC1737-30
AIC1737-27
AIC1737-25
AIC1737-20
AIC1737-18
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
2.940
2.646
2.550
1.960
1.764
3.000
2.700
2.500
2.000
1.800
3.060
2.754
2.550
2.040
1.836
V
Output Voltage
Temperature
Coefficiency
(Note 1)
50
150
PPM/
C
AIC1737
LOW OUTPUT VOLTAGE, 300mA LOW DROPOUT LINEAR REGULATOR
SPEC NO: DS-1737-00 08/06/00
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510
3
ELECTRICAL CHARACTERISTICS
(Continued)
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
Line Regulation
I
L
=1mA
V
IN
=4.0~12V
3
10
mV
Load Regulation
(Note 2)
V
IN
=5V, I
L
=0.1~300mA
7
25
mV
Current Limit
(Note 3)
V
IN
=5V, V
OUT
=0V
320
440
mA
Dropout Voltage
(Note 4)
AIC1737s
AIC1737-30
AIC1737-27
AIC1737-25
AIC1737-20
AIC1737-18
I
L
=0.1mA
I
L
=300mA
I
L
=300mA
I
L
=300mA
I
L
=300mA
I
L
=300mA
0.2
540
570
610
820
920
10
640
670
710
970
1070
mV
Ground Current
I
O
=0.1mA~I
MAX
V
IN
=4~12V
55
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
below the value measured with a 1V differential.
TYPICAL PERFORMANCE CHARACTERISTICS
D
r
opo
ut V
o
lt
a
ge (
m
V
)
Load Current (mA)
0
50
100
150
200
250
300
0
100
200
300
400
500
600
700
800
900
1000
Dropout Voltage vs Load Current
V
OUT
=2.7V
V
OUT
=3.0V
V
OUT
=2.0V
V
OUT
=1.8V
V
OUT
=2.5V
V
OUT
V
OUT
=3.0V
100mV/DIV
I
OUT
I
OUT
=0.1mA
I
OUT
=150mA
Time (0.5mS/DIV)
C
OUT
=1
F
Load Transient Response
AIC1737
LOW OUTPUT VOLTAGE, 300mA LOW DROPOUT LINEAR REGULATOR
SPEC NO: DS-1737-00 08/06/00
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510
4
TYPICAL PERFORMANCE CHARACTERISTICS
(Continued)
V
OUT
V
OUT
=3.0V
20mV/DIV
I
OUT
I
OUT
=0.1mA
I
OUT
=150mA
Time (0.5mS/DIV)
C
OUT
=10
F
Load Transient Response
V
IN
V
IN
=4.0
V
20mV/DIV
V
OUT
V
OUT
=3.0V
Time (1mS/DIV)
V
IN
=6V
Line Transient Response
C
OUT
=1
F
I
L
=1mA
D
r
opo
ut V
o
lt
a
ge (
m
V
)
Input Voltage (V)
Recommended max. Output Current vs. Input voltage
3
4
5
6
7
8
9
10
11
12
0
50
100
150
200
250
300
350
400
2.0V
2.5V
3.0V
2.7V
1.8V
BLOCK DIAGRAM
1.235V
Reference
GND
VOUT
VIN
ERROR
AMP
+
-
THERMAL
SHUTDOWN
-
+
CURRENT
LIMITING
AIC1737
LOW OUTPUT VOLTAGE, 300mA LOW DROPOUT LINEAR REGULATOR
SPEC NO: DS-1737-00 08/06/00
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510
5
PIN DESCRIPTION
VOUT PIN - Output pin.
GND PIN - Power GND.
VIN PIN
- Power Supply Input.
APPLICATION INFORMATIONS
A 1
F (or greater) capacitor is required between the
AIC1737 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 5
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 0.1
F capacitor (or greater) should be placed from
the AIC1737 input to ground if the lead inductance
between the input and power source exceeds 500nH
(approximately 10 inches of trace).
PHYSICAL DIMENSIONS
SOT-89 (unit: mm)
SYMBOL
MIN
MAX
A
1.40
1.60
B
0.36
0.48
C
0.35
0.44
D
4.40
4.60
D1
1.62
1.83
E
2.29
2.60
e
1.50 (TYP.)
e1
3.00 (TYP.)
H
3.94
4.25
B
e
H
e1
D
D1
A
C
L
E
L
0.89
1.20
SOT-89 MARKING
Part No.
Marking
AIC1737-18
BM18
AIC1737-20
BM20
AIC1737-25
BM25
AIC1737-27
BM27
AIC1737-30
BM30
PDF 
ZIP