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AIC1723
500mA Low Dropout Linear Regulator
FEATURES
Low Dropout Voltage of 750mV at 500mA Output Current (5.0V Output Version). Guaranteed 500mA Output Current. Internal 1.5 P-MOSFET Draws no Base Current. Low Ground Current at 65A. 2% Accuracy Output Voltage of 3.3V/ 3.5V/ 3.7V/ 3.8V/ 5.0V/ 5.2V. Input Voltage Range up to 12V (5.0V Output Version). Needs only 4.7F for Stability. Current and Thermal Limiting.
DESCRIPTION
The AIC1723 is a 3-pin low dropout linear regulator. The superior characteristics of the AIC1723 include zero base current loss, very low dropout voltage, and 2% accuracy output voltage. Typical ground current remains approximately 65A, from no load to maximum loading conditions. Dropout voltage at 500mA output current is exceptionally low: 750mV for the AIC1723-50 and AIC1723-52, 900mV for the AIC1723-38, AIC1723-37, AIC1723-35, and the AIC1723-33. Output current limiting and thermal limiting are built in to provide maximal protection to the AIC1723 against fault conditions. The AIC1723 comes in the popular SOT-223, TO-251 and TO-252 packages.
APPLICATIONS
Voltage Regulator for CD-ROM Drivers. Voltage Regulator for LAN Cards. Voltage Regulator for Monitor Microprocessor. Voltage Regulator for RAM Module. Wireless Communication Systems. Battery Powered Systems.
TYPICAL APPLICATION CIRCUIT
VIN VIN VOUT
AIC1723
VOUT
+
1F CIN
GND
+
10F COUT
Low Dropout Linear Regulator
Analog Integrations Corporation DS-1723-01 May 3, 00
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC TEL: 886-3-5772500 FAX: 886-3-5772510
www.analog.com.tw
1
AIC1723
ORDERING INFORMATION
AIC1723-XXXX
PACKAGING TYPE E: TO-252 F: TO-251 Y: SOT-223 ET: TO-252 TEMPERATURE RANGE C: 0C~+70C OUTPUT VOLTAGE 33: 3.3V 35: 3.5V 37: 3.7V 38: 3.8V 50: 5.0V
ORDER NUMBER
AIC1723-33CE AIC1723-35CE AIC1723-37CE AIC1723-38CE AIC1723-50CE AIC1723-52CE (TO-252) AIC1723-33CET AIC1723-35CET AIC1723-37CET AIC1723-38CET AIC1723-50CET AIC1723-52CET (TO-252) AIC1723-33CF AIC1723-35CF AIC1723-37CF AIC1723-38CF AIC1723-50CF AIC1723-52CF (TO-251) AIC1723-33CY AIC1723-35CY AIC1723-37CY AIC1723-38CY AIC1723-50CY AIC1723-52CY (SOT-223)
PIN CONFIGURATION
FRONT VIEW 1: VOUT 2: GND 3: VIN
123
FRONT VIEW 1: VIN 2: GND 3: VOUT
123
FRONT VIEW 1: VOUT 2: GND 3: VIN
123
FRONT VIEW 1: VOUT 2: GND 3: VIN
1
2
3
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage
................................................................................... -0.3~12V .............................................. -40C~ 125C ............................................................... -65C~150C
Operating Junction Temperature Range Storage Temperature Range Thermal Resistance JC
Power Dissipation................................................................................... 0.85W TO-251, TO-252 Package........................... 12.5C/W SOT-223 Package ........................................15C/W
TEST CIRCUIT
Refer to the TYPICAL APPLICATION CIRCUIT
2
AIC1723
ELECTRICAL CHARACTERISTICS (Ta=25C, CIN=1F, COUT=10F, unless
otherwise specified.)
PARAMETER TEST CONDITIONS MIN. TYP. MAX. UNIT
Output Voltage
Output Voltage Temperature Coefficiency
No Load AIC1723-52 AIC1723-50 AIC1723-38 AIC1723-37 AIC1723-35 AIC1723-33 (Note 1)
VIN=5.5~12V VIN=5.5~12V VIN=4.7~12V VIN=4.7~12V VIN=4.7~12V VIN=3.6~12V
5.100 4.900 3.725 3.625 3.430 3.234
5.2 5.0 3.8 3.7 3.5 3.3 50
5.300 5.100 3.875 3.775 3.570 3.366
V
PPM/C
Line Regulation
Load Regulation (Note 2)
Current Limit (Note 3)
IL=1mA AIC1723-52 AIC1723-50 AIC1723-38 AIC1723-37 AIC1723-35 AIC1723-33 AIC1723-52 AIC1723-50 AIC1723-38 AIC1723-37 AIC1723-35 AIC1723-33 AIC1723-52 AIC1723-50 AIC1723-38 AIC1723-37 AIC1723-35 AIC1723-33
VIN=5.5~12V VIN=5.5~12V VIN=4.7~12V VIN=4.7~12V VIN=4.7~12V VIN=4.7~12V VIN=7V, IL=0.1~500mA VIN=7V, IL=0.1~500mA VIN=5V, IL=0.1~500mA VIN=5V, IL=0.1~500mA VIN=5V, IL=0.1~500mA VIN=5V, IL=0.1~500mA VIN=7V, VOUT=0V VIN=7V, VOUT=0V VIN=5V, VOUT=0V VIN=5V, VOUT=0V VIN=5V, VOUT=0V VIN=5V, VOUT=0V
3 3 3 3 3 3 20 20 20 20 20 20 650 650 650 650 650 650
10 10 10 10 10 10 50 50 50 50 50 50
mV
mV
mA
3
AIC1723
ELECTRICAL CHARACTERISTICS (Continued)
PARAMETER TEST CONDITIONS MIN. TYP. MAX. UNIT
Dropout Voltage (Note 4)
Ground Current
AIC1723s AIC1723-52 AIC1723-50 AIC1723-38 AIC1723-37 AIC1723-35 AIC1723-33 IO=0.1mA~IMAX AIC1723-52 AIC1723-50 AIC1723-38 AIC1723-37 AIC1723-35 AIC1723-33
IL=0.1mA IL=500mA IL=500mA IL=500mA IL=500mA IL=500mA IL=500mA VIN=5.5~12V VIN=5.5~12V VIN=4.7~12V VIN=4.7~12V VIN=4.7~12V VIN=4~12V
0.2 750 750 900 900 900 900 65 65 65 65 65 65
10 850 850 1050 1050 1050 1050 90 90 90 90 90 90
mV
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
Ground Current vs. Input Voltage
60 600
Recommended Max. Output Current v.s. Input Voltage
3.3V 3.7V, 3.8V 3.5V
Output Current IOUT (mA)
50
Ground Current (A)
40
500 400
30
5V, 5.2V
300
20
200
3V
10
100 0 0 2 4 6 8 10 12 4 5 6 7 8 9 10 11 12
Input Voltage (V)
Input Voltage VIN (V)
4
AIC1723
TYPICAL PERFORMANCE CHARACTERISTICS
Load Transient Response
Output Voltage (mV, AC)
100 50 0 -50 100 250 0.1 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
(Continued)
Line Regulation Response
Output Voltage (mV, AC)
100 50 0
COUT=10F (Tantalum) VOUT=5.0V
-50
Load Current (mA)
Input Voltage (V)
COUT=1F (Tantalum) IL=1mA VOUT=5.0V
8 6
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
Time (mS)
Time (mS)
Load Transient Response
800
Dropout Voltage vs Load Current
700
Output Voltage (mV, AC)
200
100 0
Dropout Voltage (mV)
600 500 400 300 200 100
VOUT =3.3V,3.5V, 3.7V & 3.8V
-100
COUT=1F (Tantalum) VOUT=5.0V
Load Current (mA)
100 250 0.1 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
VOUT=5.0V, 5.2V
Time (mS)
0
100
200
300
400
500
Load Current(mA)
BLOCK DIAGRAM
VIN CURRENT LIMITING VOUT
ERROR AMP
+ -
+
THERMAL SHUTDOWN
1.235V Reference GND
5
AIC1723
PIN DESCRIPTION
VOUT PIN - Output pin. GND PIN - Power GND. VIN PIN - Power Supply Input.
APPLICATION INFORMATIONS
A 4.7F (or greater) capacitor is required between the AIC1723 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 AIC1723 input to ground if the lead inductance between the input and power source exceeds 500nH (approximately 10 inches of trace).
6
AIC1723
PHYSICAL DIMENSIONS
SOT-223 (unit: mm)
D 1.80 MAX B1 13 3
SYMBOL A1 B B1
E H A1 e
MIN 0.02 0.60 2.90 0.24 6.30 3.30 6.70
MAX 0.12 0.80 3.15 0.35 6.80 3.70 7.30
C D E e
C
B 3 (PLCS) 13 3
2.30 (TYP.)
H
0.91 MIN 13 3
0 ~ 10
SOT-223 MARKING
Part No. Marking Part No. Marking
AIC1723-33 AIC1723-35 AIC1723-37
AJ33 AJ35 AJ37
AIC1723-38 AIC1723-50 AIC1723-52
AJ38 AJ50 AJ52
TO-251 (unit: mm)
E A b2 C1
SYMBOL A A1 b
D
MIN 2.19 1.02 0.55 5.21 0.46 0.46 5.33 6.35
MAX 2.38 1.27 0.89 5.46 0.58 0.58 5.59 6.73
b2 C C1 D E
L C
e L
2.28 (TYP.) 7.62 (TYP.)
b e
A1
7
AIC1723
TO-252 (unit: mm)
E b2 C1 A
D
H
L b e
A1
SYMBOL A A1 b b2 C1 D E e H L
MIN MAX 2.19 2.38 1.02 1.27 0.64 0.88 5.21 5.46 0.46 0.58 5.33 5.59 6.35 6.73 2.28 (TYP.) 9.40 10.42 0.51 -
8

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