AIC2322
2A 550k/1.1MHz Synchronous PWM
FEATURES
2.5V to 6V Input Voltage Range Adjustable Output Voltage from 0....
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 RDS(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-widthmodulated (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: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
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