AIC1737
LOW OUTPUT VOLTAGE, 300mA LOW DROPOUT LINEAR REGULATOR
SPEC NO: DS-1737-00 08/06/00
ANALOG IN TEGRATIONS CORP ORATION
4 F, 9 Ind u st r y E. 9 t h R o a d, S ci e n ce- b a se d I n du s t ri al P ark , H si n ch u , Taiwan , R.O .C . TEL: (8863)577-2500 FAX:(8863)577-2510 1
FEATURES
z Low Dropout Voltage of 180mV at 100mA Output
Current (3.0V Output Version).
z Guaranteed 300mA Output Current.
z Internal 1.3Ω P-MOSFET Draws no Base Current.
z Low Ground Current at 55µA.
z 2% Accuracy Output Voltage of 1.8V/ 2.0V/ 2.5V/
2.7V/ 3.0V.
z Input Voltage Range up to 12V.
z Needs only 1µF for Stability.
z Current and Thermal Limiting.
APPLICATIONS
z Voltage Regulator for CD-ROM Drivers.
z Voltage Regulator for LAN Cards.
z Voltage Regulator for Microprocessor.
z Wireless Communication Systems.
z Batter y Powered S ystems.
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 volt age , an d 2% acc uracy output vol tag e.
Typical gr ound current remains approximately 55
µA, from no load t o maxim um loading con ditions .
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 AIC17 37 com es in the popu lar 3-p in SOT -89
packages.
TYPICAL APPLICATION CIRCUIT
+
+
AIC1737
10µF
COUT
VOUT
VOUT
GND
VIN
VIN
1µF
CIN
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
4 F, 9 Ind u st r y E. 9 t h R oad, S c ien ce- base d I ndu str ial P a r k , H si nch u, T aiw an , 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
A
IC1737-18CX
AIC1737-20CX
AIC1737-25CX
AIC1737-27CX
AIC1737-30CX
(SOT-89)
PIN CONFIGURATION
FRONT VIEW
1. GND
2: IN
3: OUT 123
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 Diss ip ati on SOT -89 Package ....…...…................. 0.5W
TEST CIRCUIT
Refer to the TYPICAL APPLICATION CIRCUIT
ELECTRICAL CHARACTERISTICS (Ta=25°
°°
°C, CIN=1µ
µµ
µF, COUT=10µ
µµ
µF, unless otherwise
specified.)
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
Output Volta ge No Load
AIC1737-30
AIC1737-27
AIC1737-25
AIC1737-20
AIC1737-18
VIN=4.0~12V
VIN=4.0~12V
VIN=4.0~12V
VIN=4.0~12V
VIN=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 Volta ge
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
4 F, 9 Ind u st r y E. 9 t h R oad, S c ien ce- base d I ndu str ial P a r k , H si nch u, T aiw an , R .O. C. TEL: (8863)577-2500 FAX:(8863)577-2510 3
ELECTRICAL CHARACTERISTICS (Continued)
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
Line Regulation IL=1mA VIN=4.0~12V 3 10 mV
Load Regulation
(Note 2) VIN=5V, IL=0.1~300mA 7 25 mV
Current Limit
(Note 3) VIN=5V, VOUT=0V 320 440 mA
Dropout Voltage
(Note 4) AIC1737s
AIC1737-30
AIC1737-27
AIC1737-25
AIC1737-20
AIC1737-18
IL=0.1mA
IL=300mA
IL=300mA
IL=300mA
IL=300mA
IL=300mA
0.2
540
570
610
820
920
10
640
670
710
970
1070
mV
Ground Current IO=0.1mA~IMAX VIN=4~12V 55 80 µA
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
Dropo ut Voltage (mV)
Load Current (mA)
0 50 100 150 200 250 300
0
100
200
300
400
500
600
700
800
900
1000 Dropo ut Volt age vs Load Curr ent
VOUT=2.7V
VOUT=3.0V
VOUT=2.0V
VOUT=1.8V
VOUT=2.5V
VOUT VOUT=3.0V 100mV/DIV
IOUT IOUT=0.1mA
IOUT=150mA
Time (0 .5mS/D IV)
COUT=1µF
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
4 F, 9 Ind u st r y E. 9 t h R oad, S c ien ce- base d I ndu str ial P a r k , H si nch u, T aiw an , R .O. C. TEL: (8863)577-2500 FAX:(8863)577-2510 4
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
VOUT VOUT=3.0V 20mV/DIV
IOUT
IOUT=0.1mA
IOUT=150mA
Time (0.5 mS/DIV)
COUT=10µF
Load Tr ansient Respons e
VIN VIN=4.0V
20mV/DIV
VOUT VOUT=3.0V
Time (1mS/ DIV)
VIN=6V
Line Transient Response
COUT=1µF
IL=1mA
Dropo ut Voltage (mV)
Input Volta ge ( V )
Recommended max. Output Current vs. Input voltage
3456789101112
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
4 F, 9 Ind u st r y E. 9 t h R oad, S c ien ce- base d I ndu str ial P a r k , H si nch u, T aiw an , 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 INFORM ATIONS
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
ma y be increased w itho ut 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 inch es of trac e).
PHYSICAL DIMENSIONS
z 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
