AIC1742 - HY-LINE
AIC1742
Low Noise, Low Quiescent Current,
150mA Linear Regulator with Noise Bypass
FEATURES
DESCRIPTION
Very Low Noise, 25μVRMS @ f=10~100kHz.
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.
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
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
Low Noise Low Dropout Linear Regulator
VIN
VIN
VOUT
CIN
VOUT
COUT
2.2µF
1µF
GND
BP
SHDN
V SHDN
CBP
AIC1742
0.01µF
* CIN : TAIYO YUDEN, CEJMK107BJ105MA-T
*COUT : TAIYO YUDEN, CEJMK107BJ225Mθ-T
Analog Integrations Corporation
Si-Soft Research Center
DS-1742P-02 010405
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
1
AIC1742
ORDERING INFORMATION
AIC1742-XXX XXX XX
PIN CONFIGURATION
PACKING TYPE
TR: TAPE & REEL
BG: BAG
C: COMMERCIAL
ACV: SOT-23-5
BCV: SOT-23-5
P: LEAD FREE COMMERCIAL
APV: SOT-23-5
BPV: SOT-23-5
OUTPUT VOLTAGE
15: 1.5V
18: 1.8V
20: 2.0V
25: 2.5V
28: 2.8V
285: 2.85V
29: 2.9V
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:
SOT-23-5
FRONT VIEW
(AXV)
1. VIN
2. GND
3. SHDN
4. BP
5. VOUT
5
1
4
2
3
(BXV)
1. VOUT
2. GND
3. VIN
4. SHDN
5. BP
AIC1742-15ACVTR
1.5V Version, in SOT-23-5 Package & Tape &
Reel Packing Type
AIC1742-15APVTR
1.5V Version, in SOT-23-5 Lead Free
Package & Tape & Reel Packing Type
2
AIC1742
• SOT-23-5 Marking
Part No.
ACV
APV
AIC1742-15AXV
ER15
ER15P
AIC1742-18AXV
ER18
AIC1742-20AXV
Part No.
BCV
BPV
AIC1742-15BXV
ES15
ES15P
ER18P
AIC1742-18BXV
ES18
ES18P
ER20
ER20P
AIC1742-20BXV
ES20
ES20P
AIC1742-25AXV
ER25
ER25P
AIC1742-25BXV
ES25
ES25P
AIC1742-28AXV
ER28
ER28P
AIC1742-28BXV
ES28
ES28P
AIC1742-285AXV
ER2J
ER2JP
AIC1742-285BXV
ES2J
ES2JP
AIC1742-29AXV
ER29
ER29P
AIC1742-29BXV
ES29
ES29P
AIC1742-30AXV
ER30
ER30P
AIC1742-30BXV
ES30
ES30P
AIC1742-33AXV
ER33
ER33P
AIC1742-33BXV
ES33
ES33P
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
9V
Shutdown Terminal Voltage
.9V
Power Dissipation
Operating Temperature Range
Maximum Junction Temperature
Storage Temperature Range
500mW
-40ºC~85ºC
125°C
-65ºC~150ºC
Lead Temperature (Soldering, 10 sec)
260°C
Thermal Resistance Junction to Case
130ºC/W
Thermal Resistance Junction to Ambient
220ºC/W
(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
AIC1742
ELECTRICAL CHARACTERISTICS
(TJ=25°C, unless otherwise specified) (Note1)
PARAMETER
TEST CONDITIONS
SYMBOL
Quiescent Current
VIN = VOUT+ 1V,
V SHDN =1.6V, IOUT = 0mA
IQ
Standby Current
VIN = VOUT+ 1V to 8V,
V SHDN =0.6V, Output OFF
ISTBY
GND Pin Current
IOUT = 50mA
IGND
Continuous Output Current
VIN = VOUT + 1V to 8V
IOUT
Output Current Limit
VIN = VOUT + 1V, VOUT = 0V
Output Voltage Tolerance
VIN = VOUT + 1V, no load
Temperature Coefficient
Line Regulation
VIN = VOUT(TYP) + 1V to 8V
VIN = 5V,
Load Regulation
IOUT = 0.1~150mA
MIN.
IOUT = 100 mA Vout≥2.5V
IOUT = 150 mA
IIL
150
VOUT
-2
Terminal
Ripple Rejection
Output Noise
f=1KHz, Ripple=0.5VP-P,
CBP = 0.1µF
CBP = 0.1µF, f = 10~100KHz
UNIT
35
45
µA
0.1
µA
3.5
mA
150
mA
250
mA
2
%
TC
50
150
ppm/ºC
∆VLIR
2
5
mV
∆VLOR
0.005
0.01
%/mA
90
160
140
230
200
350
500
800
VDROP
IOUT = 150 mA Vout<2.5V
Noise
Bypass
Voltage
MAX.
2.5
IOUT = 50 mA
Dropout Voltage
TYP.
mV
VREF
1.25
V
RR
65
dB
еn
25
µVrms
SHUTDOWN TERMINAL SPECIFICATIONS
Shutdown Pin Current
V SHDN =1.6V
Shutdown Pin Voltage (ON)
Output ON
Shutdown Pin Voltage (OFF) Output OFF
Shutdown Exit Delay Time
CBP = 0.1µF, COUT = 1µF,
IOUT=30mA
I SHDN
V SHDN
(ON)
2
1.6
V
V SHDN
(OFF)
△t
µA
0.6
300
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).
Note 2: The dropout voltage is defined as VIN – VOUT when VOUT is 1% below the value of VOUT for
VIN = VOUT + 0.5V. (Only applicable for VOUT = 2.5V ~ 5V)
4
AIC1742
TYPICAL PERFORMANCE CHARACTERISTICS
60
14
50
Ground Current (mA)
Quiescent Current (µA)
AIC1742
40
30
TA=25°C
20
VSHDN=1.6V
IOUT=0mA
10
0
3
4
5
6
7
8
9
8
6
4
10
0
20
40
60
80
100
120
Input Voltage (V)
Output Current (mA)
Fig. 1 Quiescent Current
Fig. 2 Ground Current
140
1.0
300
AIC1742
250
T=25°C
Output Voltage Deviation (%)
Short-Circuit Current (mA)
10
2
350
200
150
100
50
0
TA=25°C
12
0
2
AIC1742
0
1
2
3
4
5
6
0.8
0.6
0.4
0.2
0.0
-0.2
VIN=5V
-0.4
-0.6
VSHDN=1.6V
AIC1742-15
IOUT=0mA
-0.8
-1.0
-40
7
AIC1742-33
-20
0
20
40
60
80
Input Voltage (V)
Temperature (°C)
Fig. 3 Short-Circuit Current
Fig. 4 Output Voltage
100
120
35
25
50
AIC1742
AIC1742-15
VIN=5V
AIC1742-33
VSHDN=1.6V
TA=25°C
20
15
AIC1742-15
10
5
0
10
20
30
40
50
60
70
80
90 100 110 120 130 140 150
Output Current (mA)
Fig. 5 Load Regulation
Load Regulation (mV)
Load Regulation (mV)
30
VSHDN=1.6V
40
TA=25°C
30
20
IOUT=150mA
10
0
2.0
IOUT=100mA
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage (V)
Fig. 6 Load Regulation
5
AIC1742
TYPICAL PERFORMANCE CHARACTERISTICS
300
34
VSHDN=1.6V
TA=25°C
AIC1742-33
32
30
28
26
IOUT=150mA
24
22
20
AIC1742-25
250
Dropout Voltage (mV)
Load Regulation (mV)
(Continued)
IOUT=100mA
200
150
100
50
18
TA=25°C
16
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
0
10
8.0
20
30
40
50
Input Voltage (V)
60
70
80
90 100 110 120 130 140 150
Output Current (mA)
Fig. 8 Dropout Voltage
Fig. 7 Load Regulation
800
Ripple Rejection (dB)
Dropout Voltage (mV)
100
AIC1742-20
700
600
500
400
300
200
100
AIC1742-20
80
60
CBP=0.1µF
40
COUT=2.2µF Ceramic
20
TA=25°C
0
10
20
30
40
50
60
70
80
90
100 110
IOUT=0mA
0
10
120 130 140 150
Ripple Rejection (dB)
60
CBP=0.1µF
CBP=0.01µF
COUT=2.2µF Ceramic
20
3
80
10
10
2
10
3
4
10
10
5
6
10
CBP=0.01µF
60
40
CBP=0.1µF
COUT=2.2µF Ceramic
20
IOUT=0mA
0
4
10
AIC1742-20
100
80
40
10
Fig. 10 Input Ripple Rejection
AIC1742-30
100
2
10
Frequency (Hz)
Output Current (mA)
Fig. 9 Dropout Voltage
Ripple Rejection (dB)
CBP=0.01µF
IOUT=100mA
5
10
10
6
0
10
10
2
10
3
4
10
5
10
Frequency (Hz)
Frequency (Hz)
Fig. 11 Input Ripple Rejection
Fig. 12 Input Ripple Rejection
10
6
6
AIC1742
TYPICAL PERFORMANCE CHARACTERISTICS
AIC1742-30
100
Ripple Rejection (dB)
(Continued)
80
CBP=0.01µF
VSHDN, 2V/Div
60
40
CBP=0.1µF
COUT=2.2µF Ceramic
20
VOUT, 1V/Div
IOUT=100mA
0
10
10
2
10
3
4
5
10
10
10
6
Frequency (Hz)
Fig. 14 Shutdown Delay
Fig. 13 Input Ripple Rejection
Vin, 500mV/Div
VIN=3.5~4.5V VOUT=2.5V
VIN=4.5~3.5V VOUT=2.5V
COUT=2.2µF Ceramic
COUT=2.2µF Ceramic
IOUT=60mA
IOUT=60mA
Vout, 20mV/Div
1) Ch 1:
2↓ 2) Ch 2:
1↓
500 mVolt 25 us
20 mVolt 25 us
Vin, 500mV/Div
Vout, 20mV/Div
1) Ch 1:
2↓ 2) Ch 2:
1↓
Fig. 15 Line Transient Response
500 mVolt 100 us
20 mVolt 100 us
Fig. 16 Line Transient Response
Vout, 20mV/Div
CH1:20mV/Div
VIN=5V VOUT=2.5V
VIN=5V VOUT=2.5V
COUT=2.2µF Ceramic
COUT=2.2µF Ceramic
IOUT=0~100mA
Iout=0~100mA
Iout, 50mA/Div
2>
1) Ch 1:
1↓ 2) Ch 2:
20 mVolt 10 us
10 mVolt 10 us
Fig. 17 Transient Response 2
2>
Iout, 50mA/Div
1) Ch 1:
1↓ 2) Ch 2:
20 mVolt 10 us
10 mVolt 10 us
Fig. 18 Load Transient Response
7
AIC1742
TYPICAL PERFORMANCE CHARACTERISTICS
(Continued)
60
Output Noise (µV)
50
40
COUT=4.7µF Ceramic
CNB=0.01µF
f=10Hz to 100KHz
AIC1742-33
30
AIC1742-15
20
10
0
0.1
1
10
100
Output Current (mA)
Fig. 19 Output Noise RMS
BLOCK DIAGRAM
VIN
SHDN
Control
Circuit
1.25V
REF
-
Error
Amp
Bias
Circuit
+
Current
Limit
VOUT
Thermal
Shutdown
Disconnect
Circuit
GND
BP
PIN DESCRIPTIONS
VIN PIN
-
GND PIN SHDN PIN -
Power supply input pin. Bypass
with a 1µF capacitor to GND.
Ground pin.
Active-Low shutdown input pin.
BP PIN
-
Noise bypass pin. An external
bypass capacitor connecting to BP
pin to reduce noises at the output.
VOUT PIN - Output pin. Sources up to 150 mA.
8
AIC1742
DETAILED DESCRIPTION OF TECHNICAL TERMS
DROPOUT VOLTAGE (VDROP)
The dropout voltage is defined as the difference
between the input voltage and output voltage at
which the output voltage drops 100mV. Below
this value, the output voltage will fall as the input
voltage reduces. It depends on the load current
and junction temperature.
LINE REGULATION
Line regulation is the ability of the regulator to
maintain a constant output voltage as the input
voltage changes. The line regulation is specified
as the input voltage changes from VIN = VOUT +
1V to VIN = 8V and IOUT = 1mA.
LOAD REGULATION
Load regulation is the ability of the regulator to
maintain a constant output voltage as the load
current changes. A pulsed measurement with an
input voltage set to VIN = VOUT + VDROP can
minimize temperature effects. The load
regulation is specified by the output current
ranging from 0.1mA to 150mA.
QUIESCENT CURRENT (IQ)
Quiescent current is the current flowing through
ground pin with no output load.
GROUND CURRENT (IGND)
Ground current is the current flowing through the
ground pin with output load.
STANDBY CURRENT (ISTBY)
Standby current is the current flowing into the
regulator when the output is shutdown by setting
V SHDN at 0V and VIN at 8 V.
CURRENT LIMIT (IIL)
Current limiting of AIC1742 monitors and controls
the maximum output current, in case of a shorted
output. It protects device from the damage
resulting from any unexpected current.
RIPPLE REJECTION (RR)
Ripple rejection is the ability of the regulator to
reduce voltage ripple, which comes from input, at
output terminal. It is specified with a signal of
0.5VP-P at 1KHz frequency applying to input,
output capacitor at 2.2µF as well as a noise
bypass of 0.1µF. Ripple rejection, expressed in
dB, is the ratio of output ripple to input.
THERMAL PROTECTION
Thermal sensor protects device when the
junction temperature exceeds TJ= +155ºC. It
signals shutdown logic, turning off pass transistor
and allowing IC to cool down. After the IC’s
junction temperature cools by 15ºC, the thermal
sensor will turn the pass transistor back on.
Thermal protection is designed to protect the
device in the event of fault conditions. For a
continuous operation, do not exceed the absolute
maximum junction-temperature rating of TJ=
150ºC, or damage may occur to the device.
9
AIC1742
APPLICATION INFORMATION
INPUT-OUTPUT CAPACITORS
Linear regulators require input and output
capacitors to maintain stability. Input capacitor
at 1µF with 1uF aluminum electrolytic or 2.2µF
ceramic output capacitor is recommended. And
it should be selected within the Equivalent
Series Resistance (ESR) range as shown in
the figure 20,21. ESR of ceramic capacitor is
lower and its electrical characteristics
(capacitance and ESR) vary widely over
temperature. In general, tantalum or electric
output capacitor is suggested for heavy load.
Normally, the output capacitor should be 1µF
(aluminum electrolytic) at least and rates for
operating temperature range. Note that it’s
important to check selected manufactures
electrical characteristics (capacitance and ESR)
over temperature.
NOISE BYPASS CAPACITOR
0.01µF bypass capacitor at BP pin reduces
output voltage noise. And the BP pin has to
connect a capacitor to GND.
PMAX =
(TJ − TA)
(RθJB + RθBA)
Where TJ-TA is the temperature difference
between the die junction and the surrounding
air, RθJB is the thermal resistance of the
package, and RθBA is the thermal resistance
through the PCB, copper traces, and other
materials to the surrounding air.
As a general rule, the lower temperature is, the
better reliability of the device is. So the PCB
mounting pad should provide maximum
thermal conductivity to maintain low device
temperature.
GND pin performs a dual function of providing
an electrical connection to ground and
channeling heat away. Therefore, connecting
the GND pin to ground with a large pad or
ground plane would increase the power
dissipation and reduce the device temperature.
POWER DISSIPATION
The maximum power dissipation of AIC1742
depends on the thermal resistance of its case
and circuit board, the temperature difference
between the die junction and ambient air, and
the rate of airflow. The rate of temperature rise
is greatly affected by the mounting pad
configuration on the PCB, the board material,
and the ambient temperature. When the IC
mounting with good thermal conductivity is
used, the junction temperature will be low even
when large power dissipation applies.
The power dissipation across the device is
P = IOUT (VIN-VOUT).
The maximum power dissipation is:
10
100
100
10
10
COUT ESR (Ω)
Serial Resistor (Ω)
AIC1742
COUT=1µF
Stable Region
0.1
COUT=4.7µF
1
COUT=2.2µF
Stable Region
0.1
0.01
0.01
0
20
40
60
80
100
120
0
140
Load Current (mA)
Fig. 20 Stable Region with extra Serial Resistor vs.
Load Current
20
40
60
80
100
120
140
Load Current (mA)
Fig. 21 Region of Stable COUT ESR vs. Load Current
PHYSICAL DIMENSIONS
SOT-23-5 (unit: mm)
D
e
e1
SEE VIEW B
WITH PLATING
MIN.
MAX.
A
0.95
1.45
A1
0.05
0.15
A2
0.90
1.30
b
0.30
0.50
c
0.08
0.22
3.00
D
2.80
E
2.60
3.00
E1
1.50
1.70
e
0.95 BSC
e1
1.90 BSC
c
A
A2
b
BASE METAL
SECTION A-A
A1
L
0.30
L1
θ
0.60
0.60 REF
0°
8°
0.25
A
SOT-25
MILLIMETERS
GAUGE PLANE
SEATING PLANE
L
L1
VIEW B
θ
A
E
E1
S
Y
M
B
O
L
11
AIC1742
Note:
Information provided by AIC is believed to be accurate and reliable. However, we cannot assume responsibility for use of any
circuitry other than circuitry entirely embodied in an AIC product; nor for any infringement of patents or other rights of third parties
that may result from its use. We reserve the right to change the circuitry and specifications without notice.
Life Support Policy: AIC does not authorize any AIC product for use in life support devices and/or systems. Life support devices or
systems are devices or systems which, (I) are intended for surgical implant into the body or (ii) support or sustain life, and whose
failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably
expected to result in a significant injury to the user.
12
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