AIC1742
Low Noise, Low Quiescent Current,
150mA Linear Regulator with Noise Bypass
FEATURES
Very Low Noise, 25μV
RMS
@ f=10~100kHz.
Very Low Quiescent Current, 35μA.
Very Low Dropout Voltage, 90mV @ 50mA.
Active Low Shutdown Control.
Short Circuit and Thermal Protection.
1.5V, 1.8V, 2.0V, 2.5V, 2.8V, 2.85V, 2.9V, 3.0V,
3.3V Output Voltage.
Available in
±2%
Output Tolerance.
Low Profile Package: SOT-23-5
DESCRIPTION
AIC1742 is a low noise, low dropout linear
regulator, and is housed in a small SOT-23-5
package. The device is in the “ON” state when
the
SHDN pin is set to logic high level. A low
dropout voltage of 90mV at 50mA load current
is performed. 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 AIC1742 provide enhanced
performance for critical applications. The
noise bypass pin can be connected an
external capacitor to reduce the output noise
level.
APPLICATIONS
Cellular Telephones.
Pagers.
Personal Communication Equipment.
Cordless Telephones.
Portable Instrumentation.
Portable Consumer Equipment.
Radio Control Systems.
Low Voltage Systems.
Battery Powered Systems
TYPICAL APPLICATION CIRCUIT
V
IN
C
IN
1μF
GND
VIN
VOUT
C
OUT
2.2μF
V
OUT
SHDN
BP
C
BP
AIC1742
0.01μF
V
SHDN
* C
IN
: TAIYO YUDEN, CEJMK107BJ105MA-T
*C
OUT
: TAIYO YUDEN, CEJMK107BJ225Mθ-T
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-1742G-01 20100121
1
AIC1742
•
SOT-23-5 Marking
Part No.
ACV
APV
AGV
Part No.
BCV
BPV
BGV
AIC1742-15AXV
AIC1742-18AXV
AIC1742-20AXV
AIC1742-25AXV
AIC1742-28AXV
AIC1742-285AXV
AIC1742-29AXV
AIC1742-30AXV
AIC1742-33AXV
ER15
ER18
ER20
ER25
ER28
ER2J
ER29
ER30
ER33
ER15P
ER18P
ER20P
ER25P
ER28P
ER2JP
ER29P
ER30P
ER33P
ER15G
ER18G
ER20G
ER25G
ER28G
ER2JG
ER29G
ER30G
ER33G
AIC1742-15BXV
AIC1742-18BXV
AIC1742-20BXV
AIC1742-25BXV
AIC1742-28BXV
AIC1742-285BXV
AIC1742-29BXV
AIC1742-30BXV
AIC1742-33BXV
ES15
ES18
ES20
ES25
ES28
ES2J
ES29
ES30
ES33
ES15P
ES18P
ES20P
ES25P
ES28P
ES2JP
ES29P
ES30P
ES33P
ES15G
ES18G
ES20G
ES25G
ES28G
ES2JG
ES29G
ES30G
ES33G
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
Shutdown Terminal Voltage
Power Dissipation
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.
9V
.9V
500mW
-40ºC~85ºC
125
°
C
-65ºC~150ºC
260
°
C
130ºC/W
220ºC/W
TEST CIRCUIT
Refer to TYPICAL APPLICATION CIRCUIT
3
AIC1742
ELECTRICAL CHARACTERISTICS
(T
J
=25°C, unless otherwise specified) (Note1)
PARAMETER
TEST CONDITIONS
SYMBOL
MIN.
TYP.
MAX.
UNIT
μ
A
μ
A
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
+ 1V,
V
SHDN
=1.6V, I
OUT
= 0mA
V
IN
= V
OUT
+ 1V to 8V,
V
SHDN
=0.6V, Output OFF
I
OUT
= 50mA
V
IN
= V
OUT
+ 1V to 8V
V
IN
= V
OUT
+ 1V, V
OUT
= 0V
V
IN
= V
OUT
+ 1V, no load
V
IN
= V
OUT
（
TYP
）
+ 1V to 8V
V
IN
= 5V,
I
OUT
= 0.1~150mA
I
OUT
= 50 mA
I
OUT
= 100 mA Vout
≥
2.5V
I
OUT
= 150 mA
I
OUT
= 150 mA Vout<2.5V
Terminal
f=1KHz, Ripple=0.5V
P-P
,
C
BP
= 0.1
μ
F
C
BP
= 0.1
μ
F, f = 10~100KHz
V
SHDN
=1.6V
Output ON
I
Q
I
STBY
I
GND
I
OUT
I
IL
V
OUT
T
C
Δ
V
LIR
Δ
V
LOR
35
45
0.1
2.5
3.5
150
mA
mA
mA
150
-2
250
2
50
2
0.005
90
150
5
0.01
160
230
350
800
%
ppm/ºC
mV
%/mA
Dropout Voltage
V
DROP
140
200
500
mV
Noise
Bypass
Voltage
Ripple Rejection
Output Noise
V
REF
RR
1.25
65
25
2
1.6
0.6
300
V
dB
μ
Vrms
μ
A
е
n
I
SHDN
V
SHDN
（
ON
）
V
SHDN
（
OFF
）
△
t
SHUTDOWN TERMINAL SPECIFICATIONS
Shutdown Pin Current
Shutdown Pin Voltage (ON)
V
V
μ
S
Shutdown Pin Voltage (OFF) Output OFF
Shutdown Exit Delay Time
C
BP
= 0.1
μ
F, C
OUT
= 1
μ
F,
I
OUT
=30mA
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).
Note 2:
The dropout voltage is defined as V
IN
– V
OUT
when V
OUT
is 1% below the value of V
OUT
for
V
IN
= V
OUT
+ 0.5V. (Only applicable for V
OUT
= 2.5V ~ 5V)
4
PCB Design
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