AIC AIC1731-30PVTR 300ma, low dropout linear regulator with shutdown Datasheet

AIC1731
300mA, Low Dropout Linear Regulator with Shutdown
FEATURES
DESCRIPTION
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
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
APPLICATIONS
current and low dropout voltage makes this
PDA
DSC
Notebook
Pagers
Personal Communication Equipment
Cordless Telephones
Portable Instrumentation
Portable Consumer Equipment
Battery Powered Systems
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.
TYPICAL APPLICATION CIRCUIT
VIN
VIN
CIN
VOUT
+
+
1µF
GND
COUT
1µF
BP
SHDN
V SHDN
VOUT
CBP
AIC1731
0.1µF
Low Noise Low Dropout Linear Regulator
Analog Integrations Corporation
Si-Soft Research Center
DS-1731P-03
092304
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
AIC1731
ORDERING INFORMATION
AIC1731-XXXXXX
PIN CONFIGURATION
PACKING TYPE
TR: TAPE & REEL
BG: BAG
PACKAGE TYPE
V: SOT-23-5
C: COMMERCIAL
P: LEAD FREE COMMERCIAL
SOT-23-5 (CV)(PV)
TOP VIEW
1: VIN
2: GND
3: SHDN
4: BP
5: VOUT
5
1
4
2
3
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
• 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
Shutdown Terminal Voltage
..………………………………………………………..............12V
Noise Bypass Terminal Voltage
.…………………………….………………………..............5V
Operating Temperature Range
.………………………………………………….....-40ºC~85ºC
Maximum Junction Temperature
Storage Temperature Range
125°C
................…………………………………….........-65ºC~150ºC
Lead Temperature (Soldering, 10 sec)
260°C
Thermal Resistance (Junction to Case)
SOT-23-5 …....………..………..………..130°C /W
Thermal Resistance Junction to Ambient
SOT-23-5 …....……..…………..………..220°C /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
AIC1731
ELECTRICAL CHARACTERISTICS
(CIN=1µF, COUT=4.7µF, TJ=25°C, unless otherwise specified) (Note1)
PARAMETER
TEST CONDITIONS
SYMBOL MIN.
Quiescent Current
IOUT = 0mA, VIN = 3.6~7V
IQ
Standby Current
VIN = 3.6~7V, output OFF
ISTBY
GND Pin Current
IOUT = 0.1~300mA
IGND
Continuous Output Current
VIN = 5V
IOUT
Output Current Limit
VIN = 5V, VOUT = 0V
Output Voltage Tolerance
VIN = 5V, no load
Temperature Coefficient
TYP.
MAX.
UNIT
35
50
µA
0.1
µA
50
µA
300
mA
30
IIL
300
VOUT
-2
450
mA
2
%
TC
50
150
ppm/ºC
Line Regulation
VIN = VOUT(TYP) + 1V to 7V
∆VLIR
3
10
mV
Load Regulation
VIN = VOUT + 1.2V (Vout≥ 2.0V)
VIN = VOUT + 1.7V (Vout≤ 1.9V)
IOUT = 0.1~300mA
∆VLOR
10
30
mV
VDROP
470
570
800
1260
870
970
1200
1660
mV
VREF
1.23
∆n
0.46
RR
55
Dropout Voltage
IL=300mA
3.0V≤VOUT≤3.3V
2.5V≤VOUT≤2.9V
2.0V≤VOUT≤2.4V
1.5V≤VOUT≤1.9V
Noise Bypass Terminal Voltage
Output Noise
Ripple Rejection
CBP = 0.1µF, f = 1KHz,VIN = 5V
f = 1KHz, Ripple = 0.5VP-P,
CBP = 0.1µF
V
µV
Hz
dB
4
AIC1731
ELECTRICAL CHARACTERISTICS
PARAMETER
TEST CONDITIONS
SYMBOL MIN.
TYP.
MAX.
UNIT
0.1
µA
SHUTDOWN TERMINAL SPECIFICATIONS
Shutdown Pin Current
I SHDN
Shutdown Pin Voltage (ON)
Output ON
V SHDN
(ON)
Shutdown Pin Voltage (OFF)
Output OFF
V SHDN
(OFF)
CBP=0.1µF, COUT=1µF,
Shutdown Exit Delay Time
IOUT=30mA
1.6
V
0.6
V
∆t
300
µS
TSD
155
ºC
THERMAL PROTECTION
Thermal Shutdown Temperature
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
700
1.5V
50
600
3.3V
40
AIC1731-33
500
VDROP (mV)
Quiescent Current (µA)
60
30
20
T=80°C
T=50°C
400
300
200
10
T=20°C
100
T=-40°C
0
0
1
2
3
4
5
VIN (V)
Fig. 1 Quiescent Current vs. VIN
6
7
0
0
50
100
150
200
250
300
ILOAD (mA)
Fig. 2 VDROP vs. ILOAD
5
AIC1731
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
44.0
800
Short Circuit Current (µA)
43.5
Ground Current (µA)
43.0
42.5
3.3V
42.0
1.5V
41.5
41.0
40.5
40.0
VIN=6V
TA=25°C
39.5
39.0
0
50
100
150
200
250
600
500
400
3.3V
300
1.5V
200
100
0
300
0
1
2
3
4
5
6
ILOAD (mA)
Input Voltage (V)
Fig. 3 Ground Current vs. ILOAD
Fig. 4 Input Voltage vs. Short Circuit Current
7
46
45
AIC1731-33
Quiescent Current (µA)
44
Ground Current (µA)
700
300mA
43
150mA
42
41
30mA
40
1.5V
44
3.3V
42
40
38
VIN=5V
36
39
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
Temperature (°C)
Temperature (°C)
Fig. 5 Ground Current vs. Temperature
Fig. 6 Quiescent Current vs Temperature
3.50
3.45
IOUT=30mA
AIC1731-33
CBP=0.1µF
Output Voltage (V)
3.40
COUT=1µF
3.35
VOUT
3.30
VSHDN
3.25
3.20
3.15
3.10
VIN=5V
-40
-20
0
20
40
60
80
Temperature (°C)
Fig. 9 Output Voltage vs. Temperature
100
Fig. 10 Shutdown Exit Time
6
AIC1731
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
640
700
AIC1731-33
620
500
VDROP (mV)
T=50°C
Current Limit (mA)
600
T=80°C
400
300
200
600
580
VIN=7V
560
VIN=6V
540
520
VIN=5V
T=20°C
100
500
T=-40°C
0
0
50
100
150
200
250
300
480
-40
-20
0
20
40
60
COUT=4.7µF
COUT=1µF
VOUT
IOUT=180mA
IOUT=180mA
IOUT=120mA
IOUT=120mA
Fig. 13 Load Transient Response
Fig. 14 Load Transient Response
Vin=VOUT+2V
Vin=VOUT+2V
Vin=VOUT+1V
Vin=VOUT+1
VOUT=3.3V
100
CBP=0.1µF
CBP=0.1µF
VOUT
80
Temperature (°C)
Fig. 12 Current Limit vs. Temperature
ILOAD (mA)
Fig. 11 VDROP vs. ILOAD
CIN=1µF, COUT=1µF
VOUT=3.3V
CIN=1µF, COUT=4.7µF
CBP=0.1µF
CBP=0.1µF
Iout=50mA
Iout=50mA
Fig. 15 Line Transient Response
Fig. 16 Line Transient Response
7
AIC1731
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
VIN=Vout+2V
VIN=Vout+2V
Vin=Vout+1V
VIN=Vout+1V
VOUT=1.5V
VOUT=1.5V
CIN=1µF, COUT=1µF
CIN=1µF, COUT=4.7µF
CBP=0.1µF
CBP=0.1µF
Iout=50mA
Iout=50mA
Fig. 17 Line Transient Response
Fig. 18 Line Transient Response
BLOCK DIAGRAM
VIN
Current
Limiting
BP
VREF
1.23V
SHDN
Power
Shutdown
- Error
Amp.
+
VOUT
Thermal
Limiting
GND
PIN DESCRIPTIONS
PIN 1 : VIN
-
Power supply input pin. Bypass
with a 1µF capacitor to GND
PIN 2 : GND - Ground pin.
PIN 3 : SHDN - Active-Low shutdown input pin.
PIN 4 : BP
- Noise bypass pin. An external
bypass capacitor connected to
BP pin reduces noises at the
output.
PIN 5 : VOUT - Output pin. Sources up to 300
mA.
8
AIC1731
DETAILED DESCRIPTIONS 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 = 7V 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 300mA.
CURRENT LIMIT (IIL)
AIC1731 includes a current limiting, which
monitors and controls the maximum output
current if the output is shorted to ground. This
can protect the device from being damaged.
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.
APPLICATION INFORMATION
INPUT-OUTPUT CAPACITORS
Linear regulators require input and output
capacitors to maintain stability. Input capacitor at
1µF with a 1uF aluminum electrolytic output
capacitor is recommended. To avoid oscillation,
ceramic capacitor is rejected.
NOISE BYPASS CAPACITOR
0.1µF bypass capacitor at BP pin reduces output
voltage noise. And the BP pin has to connect a
capacitor to GND.
POWER DISSIPATION
The maximum power dissipation of AIC1731
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:
PMAX =
(TJ − TA)
(RθJB + RθBA)
9
AIC1731
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
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
PHYSICAL DIMENSIONS
SOT-23-5
(unit: mm)
D
0.25
E E1
c
L
θ
L1
e
e1
A2
A
A1
b
SYMBOL
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
D
2.80
3.00
E
2.60
3.00
E1
1.50
1.70
e
0.95 BSC
e1
1.90 BSC
L
0.30
L1
θ
0.60
0.60 REF
0°
8°
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.
10
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