AIC1731 AIC [Analog Intergrations Corporation], AIC1731 Datasheet

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AIC1731

Manufacturer Part Number
AIC1731
Description
300mA, Low Dropout Linear Regulator with Shutdown
Manufacturer
AIC [Analog Intergrations Corporation]
Datasheet

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Analog Integrations Corporation
FEATURES
APPLICATIONS
TYPICAL APPLICATION CIRCUIT
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
PDA
DSC
Notebook
Pagers
Personal Communication Equipment
Cordless Telephones
Portable Instrumentation
Portable Consumer Equipment
Battery Powered Systems
300mA, Low Dropout Linear Regulator with Shutdown
V
1µF
IN
C
IN
Si-Soft Research Center
3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: 886-3-5772500
V
SHDN
Low Noise Low Dropout Linear Regulator
+
VIN
GND
SHDN
FAX: 886-3-5772510
AIC1731
VOUT
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.
BP
www.analog.com.tw
0.1µF
C
BP
+
C
1 µ F
OUT
V
OUT
DS-1731P-03 092304
AIC1731
1

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AIC1731 Summary of contents

Page 1

... No.1, Li-Hsin Rd Science Park , Hsinchu 300, Taiwan , R.O.C. TEL: 886-3-5772500 FAX: 886-3-5772510 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 ...

Page 2

... OUTPUT VOLTAGE (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 & ...

Page 3

... SOT-23-5 …....………..………..………..130°C /W SOT-23-5 …....……..…………..………..220°C /W AIC1731 125°C 260°C ...

Page 4

... OUT ≤3.3V 3.0V≤V OUT ≤2.9V 2.5V≤V OUT I =300mA L ≤2.4V 2.0V≤V OUT ≤1.9V 1.5V≤V OUT C = 0.1µ 1KHz 1KHz, Ripple = 0. 0.1µF BP AIC1731 SYMBOL MIN. TYP. MAX 0.1 STBY GND I 300 OUT I 300 450 OUT TC 50 150 ∆ ...

Page 5

... IN SYMBOL MIN. TYP. MAX. I SHDN V SHDN 1.6 (ON) V SHDN (OFF) ∆t 300 T 155 SD AIC1731-33 T=50°C T=-40°C 50 100 150 200 I (mA) LOAD Fig vs. I DROP LOAD AIC1731 UNIT µA 0.1 V 0.6 V µS ºC T=80°C T=20°C 250 300 5 ...

Page 6

... OUT = 100 (Continued) 3.3V 1. Input Voltage (V) Fig. 4 Input Voltage vs. Short Circuit Current 3.3V 1. Temperature (°C) Fig. 6 Quiescent Current vs Temperature =30mA =0.1µ OUT =1µF OUT V SHDN Fig. 10 Shutdown Exit Time AIC1731 100 6 ...

Page 7

... IN V = Temperature (°C) Fig. 12 Current Limit vs. Temperature OUT V OUT I OUT=180mA I OUT=120mA Fig. 14 Load Transient Response Vin=V +2V OUT Vin=V +1V OUT V =3.3V OUT C =1µ Fig. 16 Line Transient Response AIC1731 = 100 =0.1µF =1µF =4.7µF OUT C =0.1µF BP Iout=50mA 7 ...

Page 8

... PIN 5 : VOUT - Output pin. Sources up to 300 (Continued) V =Vout+ =Vout+ =1.5V C =1µF, C OUT IN Fig. 18 Line Transient Response Current Limiting VOUT Thermal Limiting - Noise bypass pin. An external bypass capacitor connected to BP pin reduces noises at the output. mA. AIC1731 =4.7µF OUT C =0.1µF BP Iout=50mA 8 ...

Page 9

... 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 is specified by the output current ranging from ) 0.1mA to 300mA. CURRENT LIMIT (I ...

Page 10

... GND pin performs a dual function of providing an channeling heat away. Therefore, connecting the GND pin to ground with a large pad or ground dissipation and reduce the device temperature SYMBOL 0. θ AIC1731 electrical connection to ground plane would increase MIN MAX A 0.95 1.45 A1 0.05 ...

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