AIC2322 Datasheet, PDF (1/9 Pages) Analog Intergrations Corporation – 2A 550k/1.1MHz Synchronous PWM

AIC2322
2A 550k/1.1MHz Synchronous PWM
 ^FEATURES
 2.5V to 6V Input Voltage Range
 Adjustable Output Voltage from 0.8V to Vin
 2.0A Guaranteed Output Current
 94% Efficiency at Heavy Load
(Vin=5V, Vout=3.3V, Iout=2.0A)
 Low R_DS(ON) Internal Switches: 110mΩ
 No Schottky Diode Required
 100% Duty Cycle in Low Dropout Operation
 Fixed 550k/1.1MHz Operating Frequency
 Optional Soft-Start Internal Fixed 1ms Soft-
Start
Step-Down Converter
 ^DESCRIPTION
The AIC2322 is a low-noise, pulse-width-
modulated (PWM), DC-DC step-down converter.
The device features an internal synchronous
rectifier for high efficiency; it requires no external
Schottky diode. Shutdown mode places the
device in standby, reducing supply current to
under 2µA. Other features of the AIC2322
include high efficiency for all load range, low
dropout voltage, short circuit protection, and
over temperature protection.
 ^APPLICATIONS
 ^{LCD TV}
 ^{Multi-function Peripheral}
 ^{Cellular Phones}
 CPU I/O Supplies
 PDAs and Handy-Terminals
 Battery-Operated Devices (1 Li-Ion or 3
NiMH/ NiCd).
 ^{APPLICATIONS CIRCUIT}
VIN
8
VIN
LX
7
5V
R1
10Ω
1
VCC
FB ⁴
5
ON OFF
EN
REF ²
C2
C1
0.1uF
6
PGND
GND
3
10uF
AAIICC223232
L1
2.2uH
C4
0.1uF
VOUT
R2
3.3V
50kΩ
R3
16kΩ
C3
22uF
Typical Application Circuit
Analog Integrations Corporation
Si-Soft Research Center
DS-2322G-03 20121212
3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: [phone]
FAX: [phone]
www.analog.com.tw
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