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AIC1730
Low Noise Low Dropout, 150mA Linear Regulator
n FEATURES
l l l l l l l l
n DESCRIPTION
The AIC1730 is a low noise, low dropout linear regulator, housed in a small SOT-23-5 & SOT-236W package. The device is in the "ON" state when the SHDN pin is set to a logic high level. An internal P-MOSFET pass transistor is used to achieve a low dropout voltage of 90mV at 50mA load current. It offers high precision output voltage of 2%. The very low quiescent current and low dropout voltage make this device ideal for battery powered applications. The internal reverse bias protection eliminates the requirement for a reverse voltage protection diode. The high ripple rejection and low noise provide enhanced
Available in 2% Output Tolerance. 1.8V to 3.3V Output Voltage with 0.1V Increment. Active Low Shutdown Control. Very Low Quiescent Current. Very Low Dropout Voltage. Miniature Package (SOT-23-5 & SOT-23-6W) Short Circuit and Thermal Protection. Very Low Noise.
n APPLICATIONS
l l l l l l l l l
Cellular Telephones. Pagers. Personal Communication Equipment. Cordless Telephones. Portable Instrumentation. Portable Consumer Equipment. Radio Control Systems. Low Voltage Systems. Battery Powered Systems.
performance for critical applications. An external capacitor can be connected to the noise bypass pin to reduce the output noise level.
n TYPICAL APPLICATION CIRCUIT
VIN VIN CIN 1F
+
GND
VOUT
+
COUT 1F
VOUT
SHDN
BP CBP AIC1730 0.1F
V
SHDN
Low Noise Low Dropout Linear Regulator
Analog Integrations Corporation DS-1730-00 May 22, 01
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC TEL: 886-3-5772500 FAX: 886-3-5772510
www.analog.com.tw
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AIC1730
n ORDERING INFORMATION
AIC1730-XCX PACKAGE TYPE V: SOT-23-5 Q: SOT-23-6W OUTPUT VOLTAGE 18: 1.8V . . . 285: 2.85V . . . 33: 3.3V The output voltage is available by 0.1V per step. ORDER NUMBER AIC1730-18CV : : : AIC1730-33CV (SOT-23-5) AIC1730-18CQ : : : AIC1730-33CQ (SOT-23-6W )
FRONT VIEW
PIN CONFIGURATION
FRONT VIEW VOUT 5 BP 4
1
2
3
VIN GND SHDN VIN GND VOUT 6 5 4
1
2
3 BP
SHDN GND
n
ABSOLUTE MAXIMUM RATINGS
Supply Voltage Power Dissipation .................... ... ... ... ... ... ... ... ... ... ... ... ..... ... ... ... ... ... ... ....................12V ................ ... ... ... ... ... ... ... ... ... ... ... ... ... ... .... ... ... ... ... .............500mW .... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .....-40C~85C ................... ... ... ... ... ... ... ... ... ... ... ... ... ... .........-65C~150C ..... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ..............12V .... ... ... ... ... ... ... ... ... ... ... .... ... ... ... ... ... ... ... ... ..............5V
Operating Temperature Range Storage Temperature Range Shutdown Terminal Voltage
Noise Bypass Terminal Voltage
2
AIC1730
n ELECTRICAL CHARACTERISTICS
otherwise specified)
(CIN=1F , COUT=10F, TJ=25C, unless
PARAMETER Quiescent Current Standby Current GND Pin Current Continuous Output Current Output Current Limit Output Voltage Tolerance Temperature Coefficient Line Regulation
TEST CONDITIONS IOUT = 0mA, VIN = 3.6~12V VIN = 3.6~8V , output OFF IOUT = 0.1~150mA VIN = VOUT + 1V VIN = VOUT + 1V , VOUT = 0V VIN = VOUT + 1V , no load VIN = VOUT] TYP^ + 1V to VOUT] TYP^ + 6V
SYMBOL IQ ISTBY IGND IOUT IIL VOUT TC VLIR VLOR
MIN.
TYP. 55
MAX. 80 0.1
UNIT A A A mA mA
55
80 150
150 -2
220 2 50 2 150 7
% ppm/C mV
Load Regulation Dropout Voltage (1)
VIN = 5V , IOUT = 0.1~150mA IOUT = 50 mA IOUT = 100 mA IOUT = 150 mA VOUT2.5V
7 90
25 160 230 350 700
mV mV mV mV mV V
VDROP1
140 200
Dropout Voltage (2) Noise Bypass Terminal Voltage Output Noise
IOUT=150 mA
VOUT <2.5V
VDROP2 VREF 1.23 0.46
CBP = 0.1F , f = 1KHz VIN = 5V
?n
V Hz
A V 0.6 V S
SHUTDOWN TERMINAL SPECIFICATIONS Shutdown Pin Current Shutdown Pin Voltage (ON) Shutdown Pin Voltage (OFF) Shutdown Exit Delay Time THERMAL PROTECTION Thermal Shutdown Temperature TSD 155 C Output ON Output OFF CBP = 0.1F , COUT = 1F, IOUT=30mA I SHDN
]
0.1 1.6
V SHDN ON^ V SHDN OFF^ t
]
300
3
AIC1730
n TYPICAL PERFORMANCE CHARACTERISTICS
LINE TRANSIENT RESPONSE IOUT=1mA,CBP=0.1 F COUT=10 F LINE TRANSIENT RESPONSE IOUT=1mA,C =0.1 F BP COUT =1F
VOUT 50mV/DIV V OUT 50mV/DIV
VOUT+3V VOUT+1V VIN 2V/DIV VOUT+1V
VOUT+3V VIN 2V/DIV
TIME (100 S/DIV)
TIME (100 S/DIV)
LINE TRANSIENT RESPONSE
LINE TRANSIENT RESPONSE
IOUT =1mA,CBP =1F COUT =1 F IOUT =1mA,C =1F BP COUT=10 F V OUT 50mV/DIV VOUT 50mV/DIV
VOUT+3V V OUT +1V VOUT+1V
VOUT +3V V IN 2V/DIV VIN 2V/DIV
TIME (100 S/DIV)
TIME (100 S/DIV)
SHUTDOWN EXIT DELAY
SHUTDOWN EXIT DELAY
IOUT=30mA,CBP =0.01 F C OUT =3.3 F
V OUT 2V/DIV
IOUT =30mA,CBP =0.1 F COUT=3.3F
V OUT 2V/DIV
V SHDN 2V/DIV
VSHDN 2V/DIV
TIME (250 S/DIV)
TIME (250 S/DIV)
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AIC1730
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
SHUTDOWN EXIT DELAY SHUTDOWN EXIT DELAY IOUT =10mA,C =0.1 F BP IOUT =10mA,CBP =0.1F COUT=1 F VOUT 2V/DIV COUT=10 F V OUT 2V/DIV
VSHDN 2V/DIV
V SHDN 2V/DIV
TIME (250 S/DIV)
TIME (250 S/DIV)
LOAD TRANSIENT RESPONSE
LOAD TRANSIENT RESPONSE
CBP =0.1F COUT =1 F
CBP =0.1F COUT =10 F
VOUT 20mV/DIV
VOUT 20mV/DIV
IOUT=60mA IOUT =0mA IOUT=0mA
IOUT=60mA
IOUT
IOUT
TIME (1mS/DIV)
TIME (1mS/DIV)
LOAD TRANSIENT RESPONSE CBP =0.1 F COUT=1 F
LOAD TRANSIENT RESPONSE
CBP =0.1 F COUT =10 F VOUT 20mV/DIV
VOUT 20mV/DIV
IOUT =90mA
IOUT=90mA
I OUT=0mA
IOUT=0mA
IOUT
I OUT
TIME (1mS/DIV)
TIME (1mS/DIV)
5
AIC1730
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Dropout Voltage vs. Output Current
250 70 60 50
Ground Current vs. Input Voltage (V OUT=3.0V) I OUT=50mA
200
VOUT=3.0V
I OUT =0mA
V DROP (mV)
150
I GND (uA)
0 50 100 150
40 30 20
100
50 10 0 0 0 1 2 3 4 5 6
I OUT (mA)
V IN (V)
Quiescent Current (ON Mode) vs. Input Voltage
80 70
66 70 68
Ground Current vs. Temperature I OUT=90mA
60 50
64
I GND (mA)
I Q(A)
I OUT =0mA
IO UT=60mA IOUT=30mA
62 60 58 56
40 30 20 10 0 0 2 4 6 8 10 12 14 16
54 52 50 -40 -20 0 20 40 60 80 100 120 140 160
VIN (V)
TA(C)
Shutdown Voltage vs. Temperature
2.0 400
Short Circuit Current vs. Input Voltage
1.5
Output ON VSHDN (V) I OUT (mA)
300
1.0
200
0.5
VOUT is connected to GND
100
Output OFF
0.0 -40 0 0 40 80 120 0 2 4 6 8
TA(C)
VIN (V)
6
AIC1730
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Ground Current vs. Output Current
70
65
I GND ( A)
60 55 0 50 100 150
I OUT (mA)
n BLOCK DIAGRAM
VIN Current Limiting
BP 1.23V REF Power Shutdown
+
Error Amp. Thermal Shutdown
VOUT
SHDN
GND
7
AIC1730
n PIN DESCRIPTIONS
SOT-23-5
PIN 1 : VIN Power supply input pin. Bypass with a 1F capacitor to GND PIN 2 : GND Ground functions pin. as This a pin also To
SOT-23-6W
PIN 1 : PIN 2 :
SHDN - Active-Low shutdown input pin.
GND Ground functions pin. as This a pin also To
heatsink.
heatsink.
maximize power dissipation, use of a large pad or the circuitboard ground plane is recommended. PIN 3 : BP - Noise bypass pin. An external bypass capacitor connected to the BP pin reduces noises at the output. PIN 4 : VOUT - Output pin. Sources up to 150 mA. PIN 5 : GND Ground functions pin. as This a pin also To
maximize power dissipation, use of a large pad or the circuitboard ground plane is recommended. PIN 3 : SHDN - Active-Low shutdown input pin. PIN 4 : BP - Noise bypass pin. An external bypass capacitor connected to the BP pin reduces noises at the output. PIN 5 : VOUT - Output pin. Sources up to 150 mA.
heatsink.
maximize power dissipation, use of a large pad or the circuitboard ground plane is recommended. PIN 6 : VIN Power supply input pin. Bypass with a 1F capacitor to GND
n DETAILED DESCRIPTION OF TECHNICAL TERMS
fall as the input voltage is reduced. It depends on the
OUTPUT VOLTAGE (VOUT)
The AIC1730 provides factory-set output voltages from 1.8V to 3.3V, in 100mV increments. The output voltage is specified with VIN = VOUT (TYP) + 1V and IOUT = 0mA
load current and junction temperature. The dropout voltage is specified at which the output voltage drops 100mV below the value measured with a 1V difference.
DROPOUT VOLTAGE (VDROP)
The dropout voltage is defined as the difference between the input voltage and output voltage at which point the regulator starts to fall out of regulation. Below this value, the output voltage will
CONTINUOUS OUTPUT CURRENT (IOUT)
Normal rated output current. This is limited by package power dissipation.
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AIC1730
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 is changed from VIN = VOUT + 1 V to VIN = VOUT + 6 V and IOUT = 1mA.
THERMAL PROTECTION
The thermal sensor protects the device when the junction temperature exceeds T = +155C. It signals J the shutdown logic, turning off the pass transistor and allowing the IC to cool. After the IC's junction temperature cools by 15C, the thermal sensor will turn on the pass transistor again. Thermal protection is designed to protect the device in the event of fault conditions. For continuous operation do not exceed the absolute maximum junction-temperature rating of TJ = 150C, or damage may occur to the device.
LOAD REGULATION
Load regulation is the ability of the regulator to maintain a constant output voltage as the load current changes. To minimize temperature effects, it is a pulsed measurement with the input voltage set to VIN = VOUT + 1 V. The load regulation is specified under the output current step of 0.1mA to 150mA.
n APPLICATION INFORMATION
INPUT-OUTPUT CAPACITORS
Linear regulators require input and output capacitors to maintain stability. The
QUIESCENT CURRENT (IQ)
The quiescent current is the current flowing through the ground pin under no load.
recommended minimum value of input capacitor is 0.22F. The output capacitor should be
GROUND CURRENT (IGND)
Ground current is the current flowing through the ground pin under loading.
selected within the Equivalent Series Resistance (ESR) range shown in the graphs below for stability. Because the ceramic capacitor's ESR is lower and its and electrical ESR) vary characteristics widely over
STANDBY CURRENT (ISTBY)
Standby current is the current flowing into the regulator when the output is shutdown by setting V SHDN = 0V, VIN = 8 V.
(capacitance
temperature, a tantalum output capacitor is recommended, especially for heavier load. In general, the capacitor should be at least 1F(tantalum) and be rated for the actual ambient operating temperature range.
CURRENT LIMIT (IIL )
The AIC1730 include a current limiter, which monitors and controls the maximum output current to be 300mA typically if the output is shorted to ground. This can protect the device from being damaged.
Note: It is very important to check the selected manufactures' electrical characteristics
(capacitance and ESR) over temperature.
9
AIC1730
NOISE BYPASS CAPACITOR
Use a 0.1F bypass capacitor at BP for low output voltage noise. Increasing the capacitance such as 1F will decrease the output noise, however, values above 1F and provide are no not
PMAX = (TJ -TA)/(JB + BA)
where TJ -TA
is
the
temperature
difference
between the die junction and the surrounding air, JB is the thermal resistance of the package, and BA is the thermal resistance through the PCB, copper traces, and other materials to the surrounding air. As a general rule, the lower the temperature is,
performance recommended.
advantage
POWER DISSIPATION
The maximum power dissipation of AIC1730 depends on the thermal resistance of the case and circuit board, the temperature difference between the die junction and ambient air, and the rate of air flow. The rate of temperature rise is greatly affected by the mounting pad
the better the reliability of the device is. So the PCB mounting pad should provide maximum thermal conductivity to maintain low device temperature. The GND pin performs the 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.
configuration on the PCB, the board material, and the ambient temperature. When the IC mounting with good thermal conductivity is used, the junction will be low even if the power dissipation is great. The power dissipation across the device is P = IOUT (V IN -V OUT). The maximum power dissipation is:
100
100
COUT=1F
10 10
COUT=2.2 F
ESR()
1
ESR()
1
STABLE REGION
0.1
STABLE REGION
0.1
0.01 50 100 150
0.01 50 100 150
I OUT(mA)
IOUT (mA)
10
AIC1730
100 100
COUT=10 F COUT =3.3 F
10
10
ESR( )
ESR()
1
1
STABLE REGION
0.1
STABLE REGION
0.1
0.01 0.01 50 100 150
50
100
150
IOUT (mA)
I
(mA)
n PACKAGE DIMENSIONS
l SOT-23-5 (unit: mm)
D C L HE
SYMBOL A A1 A2 b C
MIN 1.00 -- 0.70 0.35 0.10 2.70 1.40
MAX 1.30 0.10 0.90 0.50 0.25 3.10 1.80
e
1
D E e
A2
A
1.90 (TYP) 2.60 0.37 1 3.00 -- 9
A1 b
H L 1
l
SOT-23-5 Marking
Part No. AIC1730-18CV AIC1730-19CV AIC1730-20CV AIC1730-21CV AIC1730-22CV AIC1730-23CV AIC1730-24CV AIC1730-25CV AIC1730-26CV Marking EC18 EC19 EC20 EC21 EC22 EC23 EC24 EC25 EC26 Part No. AIC1730-27CV AIC1730-28CV AIC1730-285CV AIC1730-29CV AIC1730-30CV AIC1730-31CV AIC1730-32CV AIC1730-33CV Marking EC27 EC28 EC2J EC29 EC30 EC31 EC32 EC33
11
AIC1730
l SOT-23-6W (unit: mm)
D C L HE
SYMBOL A A1 A2 b C
MIN 1.00 -- 0.70 0.35 0.10 2.70 1.60
MAX 1.30 0.10 0.90 0.50 0.25 3.10 2.00
e
1
D E e
A2
A
1.90 (TYP) 2.60 0.37 1 3.00 -- 9
A1 b
H L 1
l
SOT-23-6W Marking
Part No. AIC1730-18CQ AIC1730-19CQ AIC1730-20CQ AIC1730-21CQ AIC1730-22CQ AIC1730-23CQ AIC1730-24CQ AIC1730-25CQ AIC1730-26CQ Marking EB18 EB19 EB20 EB21 EB22 EB23 EB24 EB25 EB26 Part No. AIC1730-27CQ AIC1730-28CQ AIC1730-285CQ AIC1730-29CQ AIC1730-30CQ AIC1730-31CQ AIC1730-32CQ AIC1730-33CQ Marking EB27 EB28 EB2J EB29 EB30 EB31 EB32 EB33
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