AIC AIC1737-18 Low output voltage, 300ma low dropout linear regulator Datasheet

AIC1737
LOW OUTPUT VOLTAGE, 300mA LOW DROPOUT LINEAR REGULATOR
SPEC NO: DS-1737-00 08/06/00
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FEATURES
Low Dropout Voltage of 180mV at 100mA Output
Current (3.0V Output Version).
Guaranteed 300mA Output Current.
Internal 1.3Ω P-MOSFET Draws no Base Current.
Low Ground Current at 55µA.
2% Accuracy Output Voltage of 1.8V/ 2.0V/ 2.5V/
2.7V/ 3.0V.
Input Voltage Range up to 12V.
Needs only 1µF for Stability.
Current and Thermal Limiting.
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
µA, 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.
APPLICATIONS
Voltage Regulator for CD-ROM Drivers.
Voltage Regulator for LAN Cards.
Voltage Regulator for Microprocessor.
Wireless Communication Systems.
Battery Powered Systems.
The AIC1737 comes in the popular 3-pin SOT-89
packages.
„ TYPICAL APPLICATION CIRCUIT
VIN
VOUT
AIC1737
VIN
+
GND
1µF
CIN
VOUT
+
10µF
COUT
Low Dropout Linear Regulator
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
AIC1737
LOW OUTPUT VOLTAGE, 300mA LOW DROPOUT LINEAR REGULATOR
SPEC NO: DS-1737-00 08/06/00
„
ORDERING INFORMATION
AIC1737-XCX
ORDER NUMBER
AIC1737-18CX
AIC1737-20CX
AIC1737-25CX
AIC1737-27CX
AIC1737-30CX
(SOT-89)
PACKAGING TYPE
X:
SOT89
OUTPUT VOLTAGE
18: 1.8V
20: 2.0V
25: 2.5V
27: 2.7V
30: 3.0V
„
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
SOT-89 Package ....…...…................. 0.5W
Power Dissipation
„
TEST CIRCUIT
Refer to the TYPICAL APPLICATION CIRCUIT
„
ELECTRICAL CHARACTERISTICS
(Ta=25°°C, CIN=1µ
µF, COUT=10µ
µF, unless otherwise
specified.)
PARAMETER
Output Voltage
Output Voltage
Temperature
Coefficiency
TEST CONDITIONS
No Load
AIC1737-30
AIC1737-27
AIC1737-25
AIC1737-20
AIC1737-18
(Note 1)
VIN=4.0~12V
VIN=4.0~12V
VIN=4.0~12V
VIN=4.0~12V
VIN=4.0~12V
MIN.
TYP.
MAX.
UNIT
2.940
2.646
2.550
1.960
1.764
3.000
2.700
2.500
2.000
1.800
50
3.060
2.754
2.550
2.040
1.836
150
V
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
PPM/°C
2
AIC1737
LOW OUTPUT VOLTAGE, 300mA LOW DROPOUT LINEAR REGULATOR
SPEC NO: DS-1737-00 08/06/00
„
ELECTRICAL CHARACTERISTICS
PARAMETER
Line Regulation
Load Regulation
(Note 2)
Current Limit
(Note 3)
Dropout Voltage
(Note 4)
„
TEST CONDITIONS
IL=1mA
MIN.
TYP.
MAX.
UNIT
VIN=4.0~12V
3
10
mV
VIN=5V, IL=0.1~300mA
7
25
mV
VIN=5V, VOUT=0V
320
IL=0.1mA
IL=300mA
IL=300mA
IL=300mA
IL=300mA
IL=300mA
VIN=4~12V
AIC1737s
AIC1737-30
AIC1737-27
AIC1737-25
AIC1737-20
AIC1737-18
IO=0.1mA~IMAX
Ground Current
Note 1:
Note 2:
Note 3:
Note 4:
(Continued)
440
0.2
540
570
610
820
920
55
mA
10
640
670
710
970
1070
80
mV
µA
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
below the value measured with a 1V differential.
TYPICAL PERFORMANCE CHARACTERISTICS
Load Transient Response
Dropout Voltage vs Load Current
1000
900
800
Dropout Voltage (mV)
COUT=1µF
VOUT=1.8V
VOUT=2.0V
VOUT=3.0V
VOUT
700
100mV/DIV
600
500
400
VOUT=2.5V
300
IOUT=150mA
VOUT=2.7V
IOUT
VOUT=3.0V
200
IOUT=0.1mA
100
0
0
50
100
150
200
250
300
Load Current (mA)
Time (0.5mS/DIV)
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
AIC1737
LOW OUTPUT VOLTAGE, 300mA LOW DROPOUT LINEAR REGULATOR
SPEC NO: DS-1737-00 08/06/00
„
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Line Transient Response
Load Transient Response
COUT=1µF
IL=1mA
COUT=10µF
VIN=6V
VOUT=3.0V
VOUT
20mV/DIV
VIN
VIN=4.0V
IOUT=150mA
IOUT=0.1mA
VOUT
VOUT=3.0V
20mV/DIV
IOUT
Time (1mS/DIV)
Time (0.5mS/DIV)
Recommended max. Output Current vs. Input voltage
400
Dropout Voltage (mV)
350
300
3.0V
2.7V
2.5V
250
200
1.8V
2.0V
150
100
50
0
3
4
5
6
7
8
9
10
11
12
Input Voltage (V)
„
BLOCK DIAGRAM
VIN
VOUT
CURRENT
LIMITING
ERROR
AMP
+
-
+
THERMAL
SHUTDOWN
1.235V
Reference
GND
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
AIC1737
LOW OUTPUT VOLTAGE, 300mA LOW DROPOUT LINEAR REGULATOR
SPEC NO: DS-1737-00 08/06/00
„
PIN DESCRIPTION
VOUT PIN - Output pin.
GND PIN - Power GND.
VIN PIN
„
- Power Supply Input.
APPLICATION INFORMATIONS
A 1µF (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 5Ω 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 0.1µF 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
z SOT-89 (unit: mm)
A
D
D1
C
H
E
L
B
e
e1
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
L
0.89
1.20
SOT-89 MARKING
Part No.
AIC1737-18
AIC1737-20
AIC1737-25
AIC1737-27
AIC1737-30
Marking
BM18
BM20
BM25
BM27
BM30
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
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