AIC3413 Datasheet, PDF (1/10 Pages) Analog Intergrations Corporation – 1.2MHz Synchronous Step-Up Converter

AIC3413
400mA, 1.2MHz Synchronous Step-Up Converter
 FEATURES
 DESCRIPTION
 V_IN Start Up Voltage: 0.9V
 Output Voltage Range: from 2.7V to 5.25V.
 Up to 94% Efficiency
 1.2MHz Fixed Frequency Switching
 Built-in current mode compensation
 Built-in Protection: Over Current, Over Voltage,
Over Temperature
 Optional Automatic PWM/PSM Version (AIC3413)
and Forced PWM Version (AIC3413A).
 Logic Controlled Shutdown: < 1μA
 Output Disconnect by Shutdown Function
 Built-in Soft Start
 Active Anti-ringing Control
 Small SOT-23-6 Package
 APPLICATIONS
 Single/Dual Cells Ni-Cd/Ni-Mh/Li-Lon Type Bat-
tery Operated Products
 Wireless Mice
 PDA
 Digital Still Cameras
 Portable Equipment
The AIC3413 is a synchronous step-up DC/DC con-
verter.
There are two options for AIC3413: automatic
PWM/PSM version (AIC3413), and forced PWM ver-
sion (AIC3413A). The automatic PWM/PSM version
enters PSM from PWM automatically when load de-
creases. The goal is to improve efficiency and reduce
quiescent current; the forced PWM version keeps the
same operating frequency even when it operates in
light load. This guarantees low output ripple and noise.
The AIC3413 provides a complete power supply solu-
tion for products powered by one or two Alkaline,
Ni-Cd, Ni-MH or Li-Lon battery cells. It stays in opera-
tion with supply voltages down to 0.5V. The imple-
mented boost converter uses an internal synchronous
rectifier to obtain maximum efficiency.
A low-EMI mode is implemented to reduce ringing and
in effect lower radiated electromagnetic energy when
the converter enters the discontinuous conduction
mode.
 TYPICAL APPLICATION CIRCUITS
1.2V
VIN
CIN
4.7uF
L1
4.7uH
U1
6
VIN
SW
4
SHDN VOUT
2
GND
FB
AIC3413
1
5
R1
3
1M
R2
600K
3.3V
VOUT
COUT
4.7uF
Analog Integrations Corporation
Si-Soft Research Center
DS-3413G-P08 20110128
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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