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AIC1737
LOW OUTPUT VOLTAGE, 300mA LOW DROPOUT LINEAR REGULATOR
SPEC NO: DS-1737-00 08/06/00
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 55A. 2% Accuracy Output Voltage of 1.8V/ 2.0V/ 2.5V/ 2.7V/ 3.0V. Input Voltage Range up to 12V. Needs only 1F 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 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.
APPLICATIONS
Voltage Regulator for CD-ROM Drivers. Voltage Regulator for LAN Cards. Voltage Regulator for Microprocessor. Wireless Communication Systems. Battery Powered Systems.
TYPICAL APPLICATION CIRCUIT
VIN VIN VOUT
AIC1737
VOUT
+
GND 1F CIN
+
10F 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
PACKAGING TYPE X: SOT89 OUTPUT VOLTAGE 18: 1.8V 20: 2.0V 25: 2.5V 27: 2.7V 30: 3.0V
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 .................................................. -40C~ 85C
Storage Temperature Range ....................................................................... -65C~150C Power Dissipation SOT-89 Package .............................. 0.5W
TEST CIRCUIT
Refer to the TYPICAL APPLICATION CIRCUIT
ELECTRICAL CHARACTERISTICS
specified.)
PARAMETER Output Voltage No Load AIC1737-30 AIC1737-27 AIC1737-25 AIC1737-20 AIC1737-18 (Note 1)
(Ta=25C, CIN=1F, COUT=10F, unless otherwise
MIN. 2.940 2.646 2.550 1.960 1.764 TYP. 3.000 2.700 2.500 2.000 1.800 50 MAX. 3.060 2.754 2.550 2.040 1.836 150 UNIT V
TEST CONDITIONS VIN=4.0~12V VIN=4.0~12V VIN=4.0~12V VIN=4.0~12V VIN=4.0~12V
Output Voltage Temperature Coefficiency
PPM/C
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
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) IL=1mA
(Continued)
TEST CONDITIONS
VIN=4.0~12V VIN=5V, IL=0.1~300mA VIN=5V, VOUT=0V AIC1737s AIC1737-30 AIC1737-27 AIC1737-25 AIC1737-20 AIC1737-18 IO=0.1mA~IMAX IL=0.1mA IL=300mA IL=300mA IL=300mA IL=300mA IL=300mA VIN=4~12V
MIN.
TYP.
3 7
MAX.
10 25
UNIT
mV mV mA
320
440 0.2 540 570 610 820 920 55 10 640 670 710 970 1070 80
mV
Ground Current Note 1: Note 2: Note 3: Note 4:
A
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
Dropout Voltage vs Load Current
1000 900 800
Load Transient Response
COUT=1F VOUT=3.0V
VOUT=1.8V VOUT=2.0V
VOUT
Dropout Voltage (mV)
100mV/DIV
700 600 500 400 300 200 100 0 0 50 100 150 200 250 300
VOUT=2.5V VOUT=2.7V VOUT=3.0V
IOUT IOUT=0.1mA
IOUT=150mA
Load Current (mA)
Time (0.5mS/DIV)
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
www.analog.com.tw
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)
Load Transient Response
COUT=10F VOUT=3.0V
Line Transient Response
COUT=1F IL=1mA
VIN=6V 20mV/DIV VIN VIN=4.0V
VOUT
IOUT=150mA IOUT=0.1mA IOUT VOUT=3.0V
VOUT
20mV/DIV
Time (0.5mS/DIV)
Time (1mS/DIV)
Recommended max. Output Current vs. Input voltage
400 350
Dropout Voltage (mV)
300 250 200 150 100 50 0
3.0V 2.7V 2.5V 1.8V 2.0V
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
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
www.analog.com.tw
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 1F (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 -30C, so solid tantalums are recommended for operation below -25C. The value of this capacitor may be increased without limit. A 0.1F 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)
D D1 C A
SYMBOL A B C D
MIN 1.40 0.36 0.35 4.40 1.62 2.29
MAX 1.60 0.48 0.44 4.60 1.83 2.60 1.50 (TYP.) 3.00 (TYP.)
H E
D1 E e
L e e1 B
e1 H L 3.94 0.89
4.25 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
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
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