AIC1747
300mA Linear Regulator With Bypass Pin
FEATURES
Guarantee 300mA Output Current.
Fast Response in Line/Load Transient
Wide Operating Voltage Ranges: 2.0V to 6.0V.
0.01μA Shutdown Standby Current
Low Quiescent Current：80µA.
Output Voltage is available within 1.1~4.2V
Low Dropout：270mV at 300mA
PSRR：60dB at 1kHz.
Active High Shutdown Control.
Fixed: 1.1, 1.2, 1.3, 1.5, 1.8, 2.5, 2.7, 2.8, 2.85,
3.0, 3.3, 3.5, 3.7, 3.8 Output Voltage.Current
Limit and Thermal Protection.
Available in
±2%
Output Tolerance.
Available in 3 & 5 lead of SOT-23, TSOT23,
SC70, & SOT-89 & DFN 6L 2x2 Package.
DESCRIPTION
AIC1747 is optimized for low ESR ceramic
capacitor operation with 300mA continuous
current. The AIC1747 is designed for portable RF
and wireless applications with demanding
performance and space requirements.
The AIC1747 offers high precision output voltage
of
±2%
tolerance. Output Voltage is available
within 1.1~4.2V. There are version of 1.1, 1.2, 1.3,
1.5, 1.8, 2.5, 2.7, 2.8, 2.85, 3.0, 3.3, 3.5, 3.7, and
3.8 for a fixed output voltage.
A noise bypass pin is available for further
reduction of output noise. At 300mA load current,
a 270mV dropout can be performed. The quality
of low quiescent current and low dropout voltage
makes the device ideal for battery power
applications. The high ripple rejection and low
noise of the AIC1747 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 50
μ
s & 30
μ
s. The
AIC1747’s current limit and thermal protection
provide protection against any overload condition
that would cause excessive junction temperatures.
APPLICATIONS
Cellular Phones.
PCMCIA Cards
Laptop, Palmtops, Notebook Computers
Personal Communication Equipment.
PDAs.
Digital Still Cameras.
Portable Consumer Equipments.
TYPICAL APPLICATION CIRCUIT
V
IN
VIN
C
IN
1μF
GND
BP
EN
AIC1747
C
BP
0.1nF
VOUT
C
OUT
1μF
V
OUT
Ultra LDO 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-1747G-05
20100602
1
AIC1747
ABSOLUTE MAXIMUM RATINGS
Input Voltage ........................................................................................................................................ 7V
EN Pin Voltage ..................................................................................................................................... 7V
Noise Bypass Terminal Voltage ........................................................................................................... 7V
Power Dissipation, P
D
@ T
A
= 25ºC
SOT23-5 ................................................................................................................................... 400mW
TSOT23-5 ................................................................................................................................. 400mW
SOT-89-5 .................................................................................................................................. 625mW
SC70-5 ...................................................................................................................................... 300mW
DFN 6L 2x2 .............................................................................................................................. 606mW
Maximum Junction Temperature .................................................................................................... 150ºC
Operating Temperature Range ............................................................................................. -40ºC~85ºC
Storage Temperature Range .............................................................................................. -65ºC~150ºC
Lead Temperature (Soldering, 10 sec) .......................................................................................... 260ºC
Thermal Resistance - Junction to Case, Rθ
JC
SOT-23-5 ............................................................................................................................ 115°C /W
TSOT23-5 ............................................................................................................................ 115°C /W
SOT-89-5 ............................................................................................................................... 45°C /W
DFN 6L 2x2 ........................................................................................................................... 30°C /W
Thermal Resistance - Junction to Ambient, Rθ
JA
SOT-23-5 ............................................................................................................................. 250°C /W
TSOT23-5 ............................................................................................................................ 250°C /W
SOT-89-5 ............................................................................................................................. 160°C /W
SC70-5 ................................................................................................................................. 333°C /W
DFN 6L 2x2 ......................................................................................................................... 165°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 the TYPICAL APPLICATION CIRCUIT.
5
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