AIC AIC2951D-50CS, AIC2951D-50CN, AIC2951D-33CS, AIC2951D-33CN, AIC2951D-30CS Datasheet
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AIC2951/2951D
ERROR
C2R2R1
R3
390
R433Q1
D45H2A
AIC2951
8
7
654
3
2
1FBGND
SENSE
SHDN
TAP
VIN
VOUT
470µF
+
C1
Low Dropout Linear Regulator
n
FEATURES
l Low Dropout Voltage of 130mV at 100mA Output
Current (AIC2951/2951D-50).
l Guaranteed 150mA /300mA Output Current.
l Internal 1.3Ω P-MOSFET Draws no Base Current.
l Low Ground Current at 55µA.
l 1% Accuracy Output of 3V/3.3V/5V.
l Error Flag Warns of Output Dropout.
l 1µA Supply Current in Shutdown Mode.
l Output Programmable from 1.235V~11V.
l Fast Transient Response.
l Needs only 1µF for Stability.
l Current and Thermal Limiting.
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APPLICATIONS
l Voltage Regulator for Pentium
l Wireless Communication System.
l Battery Powered Systems.
CPUs.
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DESCRIPTION
The AIC2951/ 2951D series is the enhanced
CMOS version of the LP2951. The superior characteristics of the AIC2951/ 2951D series include
zero base current loss, very low dropout voltage,
and 1% accuracy output voltage. Typical 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
AIC2951-50/2951D-50, 180mV for the AIC295133/ 2951D-33, and 200mV for the AIC2951-30/
2951D-30. Output current limiting and thermal
limiting are built in to provide maximal protection
to the AIC2951/2951D series from fault conditions.
An error flag output, indicating when output voltage drops out of regulation, often due to the
falling batteries on the input, can be used for a
power-on reset. A logic-controlled shutdown
input enables the regulator to be switched on and
off. The part may be configured for a fixed output
voltage or programmed from 1.235V to 11V with
an external pair of resistors. The part comes in 8pin DIP or SO packages.
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TYPICAL APPLICATION CIRCUIT
V
=1.235(1+R1/R2)
OUT
+
V
VOUT
1000µF
IN
Pentium Processor Power Supply
Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
www.analog.com.tw
DS-2951-01 Mar 13, 00 TEL: 886-3-5772500 FAX: 886-3-5772510 1
TOP VIEW
3
4
657
SENSE
FB
ERROR
VOUT
ERROR
VINFBTAP
SHDN
SENSE
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ORDERING INFORMATION
AIC2951 X-XXXX
PACKAGE TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
TEMPERATURE RANGE
C: 0°C~+70°C
OUTPUT VOLTAGE
MAX. OUTPUT CURRENT
DEFAULT : 150mA
30 : 3.0V
33 : 3.3V
50 : 5.0V
D : 300mA
AIC2951/2951D
Low Dropout Linear Regulator
ORDER NUMBER
AIC2951-30CN
AIC2951-33CN
AIC2951-50CN
AIC2951D-30CN
AIC2951D-33CN
AIC2951D-50CN
(PLASTIC DIP)
AIC2951-30CS
AIC2951-33CS
AIC2951-50CS
AIC2951D-30CS
AIC2951D-33CS
AIC2951D-50CS
(PLASTIC SO)
PIN CONFIGURATION
1
2
SHDN
GND
8
VIN
TAP
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ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage ........................……………............................................... -0.3~12V
Feedback Input Voltage..................................…………….................................. -0.3~12V
Shutdown Input Voltage ................................…………….................................. -0.3~12V
Error Comparator Output ......................................………….............................. -0.3~12V
Operating Junction Temperature Range .............………….......................... -40°C~125 °C
Storage Temperature Range ............................…………............................ -65°C~150 °C
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TEST CIRCUIT
V
OUT
+
COUT
10µF
SHUTDOWN
VOUT
VREF
1mA
GND
AIC2951
V
IN
+
CIN
1µF
2
AIC2951/2951D
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ELECTRICAL CHARACTERISTICS (Ta=25°C, C
erwise specified.)
PARAMETER TEST CONDITIONS MIN. TYP. MAX. UNIT
Output Voltage No Load
AIC2951/2951D-50
AIC2951/2951D-33
AIC2951/2951D-30
Output Voltage Temperature Coefficiency
Line Regulation IL=1mA
Load Regulation
(Note 2)
Current Limit
(Note 3)
Dropout Voltage
(Note 4)
Ground Current IO=0.1mA~I
FB Reference Voltage AIC2951-50
Reference Voltage Temp.
Coef. (Note 1)
FB Pin Current AIC2951/2951D VIN=7V 20 60
(Note 1) 50 150
AIC2951/2951D-50
AIC2951/2951D-33
AIC2951/2951D-30
AIC2951-50
AIC2951D-50
AIC2951-30/ -33
AIC2951D-30/-33
AIC2951-50
AIC2951-30/ -33
AIC2951D-50
AIC2951D-30/ -33
AIC2951/2951D
AIC2951-50
AIC2951-33
AIC2951-30
AIC2951D-50
AIC2951D-33
AIC2951D-30
MAX
AIC2951/2951D-50
AIC2951/2951D-33
AIC2951/2951D-30
AIC2951-30/ -33
VIN=5.5~12V
VIN=3.6~12V
VIN=3.3~12V
VIN=5.5~12V
VIN=3.6~12V
VIN=3.3~12V
VIN=7V, IL=0.1~150mA
VIN=7V, IL=0.1~300mA
VIN=5V, IL=0.1~150mA
VIN=5V, IL=0.1~300mA
VIN=7V, V
VIN=5V, V
VIN=7V, V
VIN=5V, V
IL=0.1mA
IL=150mA
IL=150mA
IL=150mA
IL=300mA
IL=300mA
IL=300mA
VIN=5.5~12V
VIN=4~12V
VIN=4~12V
VIN=5.5~12V
VIN=3.6~12V
OUT
OUT
OUT
OUT
=0V
=0V
=0V
=0V
=1µF, C
IN
4.950
3.267
2.970
1.222
1.222
OUT
1.235
1.235
=10µF, unless oth-
5.0
3.3
3.0
220
220
440
440
0.2
200
270
300
400
540
600
5.050
3.333
3.030
3
3
3
7
7
7
7
55
55
55
50 150
10
10
10
15
25
15
25
10
300
370
400
500
640
700
80
80
80
1.248
1.248
PPM/°C
mV
mV
MA
mV
PPM/°C
NA
V
µA
V
Error Pin off Leakage
Current
Error Pin Pull Low
Voltage
AIC2951/2951D VIN=7V 1
IOL=1mA
AIC2951/2951D-50
AIC2951/2951D-33
VIN=4.5V
VIN=2.9V
100
100
300
300
µA
mV
3
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