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PDF AIC2322 Datasheet ( Hoja de datos )

Número de pieza AIC2322
Descripción PWM Step-Down DC/DC Converter
Fabricantes Analog Intergrations Corporation 
Logotipo Analog Intergrations Corporation Logotipo

Total 9 Páginas
		
AIC2322 Hoja de datos, Descripción, Manual
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: 110m
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
10
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
50k
R3
16kC3
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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AIC2322 pdf
AIC2322
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
VIN=VCC=5V,VOUT=2.5V,ILOAD=0.5A to 1A
OUT
Ripple
VIN=VCC=5V,VOUT=1.5V,ILOAD=0.5A to 1A
OUT
Ripple
ILOAD
Fig. 7 Load Transient Response
ILOAD
Fig. 8 Load Transient Response
Fig. 9 Switching Frequence vs Input Voltage
Fig. 10 Output Voltage Deviation vs Input Voltage
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