AIC1731
300mA, Low Dropout Linear Regulator with Shutdown
FEATURES
Active Low Shutdown Control.
Very Low Quiescent Current.
Very Low Dropout Voltage of 470mV at 300mA
Output Current (3.0V Output Version)
1.5V, 1.8V, 2.5V, 2.8V, 3.0V, 3.3V Output Voltage.
Short Circuit and Thermal Protection.
±2%
Output Tolerance.
Miniature Package: SOT-23-5
DESCRIPTION
AIC1731 is a 300mA low noise, low dropout
linear regulator, and is housed in small SOT-23-5
package. The device is in the “ON” state when
the
SHDN
pin is set to logic high level. An
internal P-MOSFET pass transistor is used to
achieve 470mV low dropout voltage at 300mA
load current. It offers high precision output
voltage of
±2%.
The quality of low quiescent
current and low dropout voltage makes this
device ideal for battery power applications. The
internal reverse bias protection eliminates the
requirement for a reverse voltage protection
diode. The high ripple rejection and low noise of
AIC1731 provide enhanced performance for
critical applications. The noise bypass pin can be
connected an external capacitor to reduce the
output noise level.
APPLICATIONS
PDA
DSC
Notebook
Pagers
Personal Communication Equipment
Cordless Telephones
Portable Instrumentation
Portable Consumer Equipment
Battery Powered Systems
TYPICAL APPLICATION CIRCUIT
V
IN
C
IN
1µF
GND
VIN
+
VOUT
+
V
OUT
C
OUT
1µF
SHDN
BP
C
BP
AIC1731
0.1µF
V
SHDN
Low Noise Low Dropout Linear Regulator
Analog Integrations Corporation
Si-Soft Research Center
3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
DS-1731P-03
092304
1
AIC1731
ORDERING INFORMATION
AIC1731-XXXXXX
PACKING TYPE
TR: TAPE & REEL
BG: BAG
PACKAGE TYPE
V: SOT-23-5
C: COMMERCIAL
P: LEAD FREE COMMERCIAL
OUTPUT VOLTAGE
15: 1.5V
18: 1.8V
25: 2.5V
28: 2.8V
30: 3.0V
33: 3.3V
(Of a unit of 0.1V within the voltage range from 1.5V to 3.3V, additional
voltage versions for this product line may be available on demand with
prior consultation with AIC.)
Example: AIC1731-18CVTR
1.8V Version, in SOT-23-5 Package & Tape & Reel
Packing Type
AIC1731-18PVTR
1.8V Version, in SOT-23-5 Lead Free Package & Tape &
Reel Packing Type
PIN CONFIGURATION
SOT-23-5 (CV)(PV)
TOP VIEW
1: VIN
2: GND
3: SHDN
4: BP
5: VOUT
5
4
1
2
3
•
SOT-23-5 Marking
Part No.
AIC1731-15CV
AIC1731-18CV
AIC1731-25CV
AIC1731-28CV
AIC1731-30CV
AIC1731-33CV
Marking
ED15
ED18
ED25
ED28
ED30
ED33
Part No.
AIC1731-15PV
AIC1731-18PV
AIC1731-25PV
AIC1731-28PV
AIC1731-30PV
AIC1731-33PV
Marking
ED15P
ED18P
ED25P
ED28P
ED30P
ED33P
2
AIC1731
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
.................………………………………..…………………....................12V
..………………………………………………………..............12V
.…………………………….………………………..............5V
.………………………………………………….....-40ºC~85ºC
125°C
................…………………………………….........-65ºC~150ºC
260°C
SOT-23-5 …....………..………..………..130°C /W
SOT-23-5 …....……..…………..………..220°C /W
Shutdown Terminal Voltage
Noise Bypass Terminal Voltage
Operating Temperature Range
Maximum Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10 sec)
Thermal Resistance (Junction to Case)
Thermal Resistance Junction to Ambient
(Assume no ambient airflow, no heatsink)
Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
TEST CIRCUIT
Refer to TYPICAL APPLICATION CIRCUIT
3
AIC1731
ELECTRICAL CHARACTERISTICS
(C
IN
=1µF, C
OUT
=4.7µF, T
J
=25°C, unless otherwise specified) (Note1)
PARAMETER
Quiescent Current
Standby Current
GND Pin Current
Continuous Output Current
Output Current Limit
Output Voltage Tolerance
Temperature Coefficient
Line Regulation
Load Regulation
V
IN
= V
OUT(TYP)
+ 1V to 7V
V
IN
= V
OUT
+ 1.2V (Vout≥ 2.0V)
V
IN
= V
OUT
+ 1.7V (Vout≤ 1.9V)
I
OUT
= 0.1~300mA
3.0V≤V
OUT
≤3.3V
2.5V≤V
OUT
≤2.9V
2.0V≤V
OUT
≤2.4V
1.5V≤V
OUT
≤1.9V
TEST CONDITIONS
I
OUT
= 0mA, V
IN
= 3.6~7V
V
IN
= 3.6~7V, output OFF
I
OUT
= 0.1~300mA
V
IN
= 5V
V
IN
= 5V, V
OUT
= 0V
V
IN
= 5V, no load
SYMBOL MIN.
I
Q
I
STBY
I
GND
I
OUT
I
IL
V
OUT
TC
∆V
LIR
∆V
LOR
300
-2
50
3
10
470
570
800
1260
1.23
0.46
450
2
150
10
30
870
970
1200
1660
30
TYP.
35
MAX.
50
0.1
50
300
UNIT
µA
µA
µA
mA
mA
%
ppm/ºC
mV
mV
Dropout Voltage
I
L
=300mA
V
DROP
mV
Noise Bypass Terminal Voltage
Output Noise
C
BP
= 0.1µF, f = 1KHz,V
IN
= 5V
f = 1KHz, Ripple = 0.5V
P-P
,
C
BP
= 0.1µF
V
REF
∆n
V
µ
V
Hz
dB
Ripple Rejection
RR
55
4
AIC1731
ELECTRICAL CHARACTERISTICS
PARAMETER
TEST CONDITIONS
SYMBOL MIN.
TYP.
MAX.
UNIT
SHUTDOWN TERMINAL SPECIFICATIONS
Shutdown Pin Current
Shutdown Pin Voltage (ON)
Shutdown Pin Voltage (OFF)
Shutdown Exit Delay Time
THERMAL PROTECTION
Thermal Shutdown Temperature
T
SD
155
ºC
Output ON
Output OFF
C
BP
=0.1µF, C
OUT
=1µF,
I
OUT
=30mA
I
SHDN
V
SHDN
(ON)
V
SHDN
(OFF)
∆t
300
1.6
0.6
0.1
µA
V
V
µS
Note 1:
Specifications are production tested at TA=25°C. Specifications over the -40°C to 85°C operating
temperature range are assured by design, characterization and correlation with Statistical Quality
Controls (SQC).
TYPICAL PERFORMANCE CHARACTERISTICS
60
50
40
30
20
700
1.5V
3.3V
V
DROP
(mV)
600
500
400
300
200
100
AIC1731-33
Quiescent Current (µA)
T=80°C
T=50°C
10
0
0
1
T=20°C
T=-40°C
50
100
150
200
250
300
V
IN
(V)
Fig. 1 Quiescent Current vs. V
IN
2
3
4
5
6
7
0
0
I
LOAD
(mA)
Fig. 2 V
DROP
vs. I
LOAD
5
51mcu
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