AIC1721/1721D
3-pin Low Dropout Linear Regulator
FEATURES
Low Dropout Voltage of 130mV at 100mA Output
Current (5V Output Version).
Guaranteed 150mA/300mA Output Current.
Internal 1.3Ω P-MOSFET Draws no Base Current.
Low Ground Current at 55µA.
1% Accuracy Output Voltage of 3.3V/5V.
Input Voltage Range up to 12V (5V Output
Version).
Extremely Tight Load and Line Regulation.
Fast Transient Response.
Needs only 1µF for Stability.
Current and Thermal Limiting.
DESCRIPTION
The AIC1721/1721D is the enhanced CMOS
version
of
the
LP2950.
The
superior
characteristics of the AIC1721/1721D include
zero base current loss, very low dropout voltage,
and 1% accuracy output voltage. Typica-l ground
current remains approximately 55µA, from no
load to maximum loading conditions. Dropout
voltage at 100mA output current is significantly
lower than its bipolar counterpart: 130mV for the
AIC1721-5/1721D-5,
and
180mV
for
the
AIC1721/ 1721D. Output current limiting and
thermal limiting are built in to provide maximal
protection to the AIC1721/ 1721D against fault
conditions.
While pin-to-pin compatible with the LP2950 and
the industry industry standard 78XX series of
voltage regulators, the AIC1721/1721D comes in
the popular3-pin SOT-89 or TO-92 packages.
APPLICATIONS
Voltage Regulator for LAN Cards.
Wireless Communication Systems.
Battery Powered Systems.
TYPICAL APPLICATION CIRCUIT
VIN
V
IN
AIC1721/
AIC1721D
VOUT
V
OUT
GND
+
1µF
C
IN
+
10µF
C
OUT
Negative Voltage Regulator
Analog Integrations Corporation
DS-1721-01
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
AIC1721
ORDERING INFORMATION
AIC1721X-XXX
PACKAGING TYPE
X: SOT-89
Z: TO-92
TEMPERATURE RANGE
C: 0°C~+70°C
OUTPUT VOLTAGE
DEFAULT: 3.3V
5: 5.0V
ORDER NUMBER
AIC1721CX
AIC1721-5CX
AIC1721DCX
AIC1721D-5CX
(SOT-89)
PIN CONFIGURATION
FRONT VIEW
1: VOUT
2: GND
3: VIN
1
2
3
OUTPUT CURRENT
DEFAULT: 150mA
D: 300mA
AIC1721CZ
AIC1721-5CZ
AIC1721DCZ
AIC1721D-5CZ
(TO-92)
TOP VIEW
1: VOUT
2: GND
3: VIN
1
2
3
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage
.................................…………......……................................
-0.3~12V
Operating Junction Temperature Range
..............….....……..….…..............
-40°C~ 125°C
Storage Temperature Range
Power Dissipation
..............................….………........................
-65°C~150°C
SOT-89 Package
..….…….…...........
0. 80W
TO-92 Package
.......…….…............
0.78W
TEST CIRCUIT
Refer to the TYPICAL APPLICATION CIRCUIT
2
AIC1721
ELECTRICAL CHARACTERISTICS
otherwise specified.)
PARAMETER
Output Voltage
(Ta=25°C, C
IN
=1µF, C
OUT
=10µF, unless
°
µ
µ
TEST CONDITIONS
No Load
AIC1721/1721D-5
AIC1721/1721D
(Note 1)
MIN.
4.950
3.267
TYP.
5.0
3.3
50
MAX.
5.050
3.333
150
UNIT
V
V
IN
=5.5~12V
V
IN
=3.6~12V
Output Voltage
Temperature
Coefficiency
Line Regulation
PPM/°C
Load Regulation
(Note 2)
Current Limit
(Note 3)
Dropout Voltage
(Note 4)
Ground Current
I
L
=1mA
AIC1721/1721D-5
AIC1721/1721D
AIC1721-5
AIC1721D-5
AIC1721
AIC1721D
AIC1721-5
AIC1721
AIC1721D-5
AIC1721D
AIC1721/1721D
AIC1721-5
AIC1721
AIC1721D-5
AIC1721D
I
O
=0.1mA~I
MAX
AIC1721/1721D-5
AIC1721/1721D
mV
V
IN
=5.5~12V
V
IN
=3.6~12V
V
IN
=7V, I
L
=0.1~150mA
V
IN
=7V, I
L
=0.1~300mA
V
IN
=5V, I
L
=0.1~150mA
V
IN
=5V, I
L
=0.1~300mA
V
IN
=7V, V
OUT
=0V
V
IN
=5V, V
OUT
=0V
V
IN
=7V, V
OUT
=0V
V
IN
=5V, V
OUT
=0V
I
L
=0.1mA
I
L
=150mA
I
L
=150mA
I
L
=300mA
I
L
=300mA
V
IN
=5.5~12V
V
IN
=4~12V
3
3
7
7
7
7
440
440
440
440
0.2
200
270
400
540
55
55
10
10
15
25
15
25
mV
320
320
320
320
mA
10
300
370
500
640
80
80
mV
µA
Note 1:
Note 2:
Note 3:
Note 4:
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.
3
AIC1721
BLOCK DIAGRAM
GND
+
V
REF
-
+
-
VIN
VOUT
TYPICAL PERFORMANCE CHARACTERISTICS
Output Voltage vs. Temperature
102
Normalized Output Voltage (%)
60
Ground Current vs. Input Voltage
50
Ground Current (
µ
A)
101
40
100
30
20
99
10
98
-40
0
0
50
Temperature (°C)
100
125
0
0
2
4
6
8
10
12
Input Voltage (V)
Ground Current vs. Temperature
60
600
Dropout Voltage vs Load Current
58
500
Ground Current (µA)
Dropout Voltage (mV)
V
OUT
=3.3V
400
I
L
=300mA
56
I
L
=150mA
54
300
200
V
OUT
=5V
52
I
L
=0.1mA
100
50
0
-50
-25
0
25
50
75
100
125
0
50
100
150
200
250
300
Temperature(°C)
Load Current (mA)
4
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