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PDF AIC1748 Data sheet ( Hoja de datos )
| Número de pieza | AIC1748 | |
| Descripción | 600mA Linear Regulator | |
| Fabricantes | Analog Intergrations Corporation | |
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AIC1748
High PSRR, 600mA Linear Regulator With Bypass Pin
FEATURES
DESCRIPTION
Guarantee 600mA Output Current.
Fast Response in Line/Load Transient.
Wide Operating Voltage Ranges: 2.3V to
6.0V.
<0.01μA Shutdown Standby Current.
Low Quiescent Current：<100µA.
Fixed: 0.8V, 1.2V, 1.8V, 2.5V, 2.85V, 3.3V ,
4.0V Output Voltage.
Adjustable Output Voltage are available from
0.8~4.5V.
Low Dropout：350mV at 600mA load current
and 3.3V output voltage.
High PSRR：65dB at 1kHz.
Active Low or High Shutdown Control.
Current Limit, Current Foldback and Thermal
Protection.
Available in ±2% Output Tolerance.
Available in 3 & 5 lead of SOT23, SOT89,
TO252 & 3 lead of SOT223 Package.
APPLICATIONS
Cellular Phones
PCMCIA Cards
Laptop, Palmtops, Notebook Computers
Personal Communication Equipment
PDAs
Digital Still Cameras
Portable Consumer Equipments
A low noise, high PSRR and ultra low dropout
linear regulator AIC1748 is optimized for
ceramic capacitors operation with 600mA
continuous current. The AIC1748 is designed
for portable and wireless devices with
demanding performance and space
requirements.
The AIC1748 offers high precision output
voltage of 2% tolerance. Output voltage can
also be available on demand for those other
than the preset values.
A noise bypass pin is available for further
reduction of output noise. At 600mA load
current and 3.3V output voltage, a 350mV
dropout is performed. The quality of low
quiescent current and low dropout voltage
makes this device ideal for battery power
applications. The high ripple rejection and low
noise of the AIC1748 provide enhanced
performances for critical applications such as
cellular phones, and PDAs.
In addition, a logic-level shutdown input is
included, which reduce supply current to less
than 0.01μA (typ.) in shutdown mode with fast
turn-on & off time less than 50μs & 30μs. The
AIC1748’s current limit and thermal protection
provide protection against any overload
condition that would create excessive junction
temperatures.
TYPICAL APPLICATION CIRCUIT
AIC1748-33
Vin VIN VOUT
GND
Vout Vin
3.3V ENABLE
Cin Cout Cin
1uF 1uF 1uF
AIC1748AL-33
VIN VOUT
EN ADJ
GND
Vout
R1 3.3V
375k
R2 Cout
120k 1uF
Fixed Linear Regulator
Adjustable 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-1748G-05 20120612
1
1 page  
AIC1748
ABSOLUTE MAXIMUM RATINGS
Input Voltage ........................................................................................................................................ 7V
EN Pin Voltage ..................................................................................................................................... 7V
Noise Bypass Terminal Voltage ........................................................................................................... 7V
Operating Temperature Range ............................................................................................. -40ºC~85ºC
Maximum Junction Temperature.................................................................................................... 150ºC
Storage Temperature Range .............................................................................................. -65ºC~150ºC
Lead Temperature (Soldering, 10 sec) .......................................................................................... 260ºC
Thermal Resistance Junction to Case
SOT-23 ............................................................... 115ºC /W
SOT-223 ............................................................... 15ºC /W
TO-252.................................................................... 8ºC /W
SOT-89 ................................................................. 45ºC /W
Thermal Resistance Junction to Ambient SOT-23 ............................................................... 250ºC /W
(Assume no ambient airflow, no heatsink) SOT-223.............................................................. 130ºC /W
TO-252................................................................ 100ºC /W
SOT-89 ............................................................... 160ºC /W
Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
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5 Page 
AIC1748
TYPICAL PERFORMANCE CHARACTERISTICS(Continued)
IOUT = 1mA~600mA
VOUT Ripple
VIN = 4.3V to 5.3V
Iload = 300mA
VIN
IOUT
VOUT Ripple
Fig.19 Load Transient Response at VIN=4.3V, VOUT=3.3V
VOUT
EN
CBP = 0nF
VIN=4.3V, VOUT=3.3V
IOUT = 600mA
IIN
Fig.21 Start-up waveform without bypass capacitor
VOUT
CBP = 0.1nF
VIN=4.3V, VOUT=3.3V
IOUT =600mA
Fig.20 Line Transient Response at VOUT=3.3V, IOUT=300mA
VOUT
EN
CBP = 0.1nF
VIN=4.3V, VOUT=3.3V
IOUT = 600mA
IIN
Fig.22 Start-up waveform with 0.1nF bypass capacitor
VOUT
VOUT=3.3V
EN
IIN
Fig.23 Shutdown transient with 0.1nF bypass capacitor
(0,0)
200mA/DIV
IOUT
Fig.24 Current Fold Back at VOUT=3.3V
11
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| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet AIC1748.PDF ] | |
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