AIC1221 Datasheet, PDF (1/17 Pages) Analog Intergrations Corporation – Ultra LDO 2A Linear Regulator With Adjustable AND Bypass Pin

AIC1221
Ultra LDO 2A Linear Regulator With
Adjustable & Bypass Pin
 ^FEATURES
 Guaranteed 2A Output Current.
 Fast Response in Line/Load Transient.
 Wide Operating Voltage Ranges: 1.8V to 6V.
 0.01µA Shutdown Standby Current.
 Low Quiescent Current: 30µA.
 Fixed: 1.8V, 2.5V, 3.3V, 5V Output Voltage.
 Adjustable Output Voltage are available from
0.8~5.5V.
 Low Dropout：550mV at 2A and 3.3V output
voltage, 480mV at 2A and 5V output voltage.
 High PSRR：70dB at 1kHz.
 Active Low or High Shutdown Control. Current
Limit and Thermal Protection.
 Available in ±2% Output Tolerance.
 Available in SOT-223 & TO-252 (3 & 5 pin) and
SOP-8 Package.
 ^APPLICATIONS
 LCD TV, LCD Monitor, DPF
 Networking
 STB
 DVD, HDD Driver
 Portable AV Equipment
 PC Peripherals
 ^DESCRIPTION
A low noise, high PSRR and ultra low dropout
linear regulator AIC1221 is optimized for low ESR
ceramic capacitors operation with 2A continuous
current. The AIC1221 is designed for portable and
wireless devices with demanding performance
and space requirements.
The AIC1221 offers high precision output voltage
of 2% tolerance. Output voltage can also be
adjusted for those other than the preset values.
A noise bypass pin is available for further
reduction of output noise. The bypass pin could
be floating if it’s unnecessary. At 2A load current
and 5V output voltage, a 480mV 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 AIC1221 provide
enhanced performances for critical applications
In addition, a logic-level shutdown input is
included, which reduce supply current to 0.01µA
(typ.) in shutdown mode with fast turn-on time
less than 100µs. The AIC1221’s current limit and
thermal protection provide protection against any
overload condition that would create excessive
junction temperatures.
 ^{TYPICAL APPLICATION CIRCUIT}
AIC1221-33
Vin
1
VIN
VOUT
3
Vout
Cin
4.7uF
GND
2
3.3V
Cout
4.7uF
Vin
EN
Cin
4.7uF
AIC1221AL-50
2
VIN
VOUT
4
1
EN/EN
ADJ
5
GND
3
Vout
R1
3.3V
446k
R2
120k
Cout
4.7uF
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: [phone],
FAX: [phone] www.analog.com.tw
DS-1221G-03 20111230
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