ADVANCE INFORMATION
AIC1640
LOW VOLTAGE STEP-UP DC/DC CONVERTER
SPEC NO: DS-1640-P1
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DESCRIPTION
FEATURES
Guaranteed Start-Up from Below 0.9 V.
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The AIC1640 is a high efficiency step-up DC/DC
converter for applications using 1 to 4 battery cells.
Only three external components are required to de-
liver a fixed output voltage of 3V, 3.3V, or 5V.
High Efficiency.
Low Quiescent Current.
Fixed or adjustable Output Voltage.
Logic Controlled Shutdown.
External Switch Driver available.
Pulse Frequency Modulation scheme brings opti-
mized performance for applications with light output
loading and low input voltage. The output ripple
and noise are lower compared with the circuit op-
erating in PSM mode. The AIC1640 starts up from
below 0.9V input to boost either 3V, 3.3V, or 5V
output with 1mA load.
APPLICATIONS
Pagers.
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Cameras.
Wireless Microphones.
Pocket Organizers.
Battery Backup Suppliers.
Portable Instruments.
Some useful features include external driver for
higher power level applications, shutdown mode for
saving the life of battery, and adjustable output ver-
sion. The PFM control circuit operates in 100KHz
(max.) switching rate, resulting in smaller passive
component size, which makes the AIC1640 an ide-
al choice of DC/DC converter for space conscious
applications.
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TYPICAL APPLICATION CIRCUIT
V
OUT
+
3.3V/100mA
V
3.3V
C2
OUT
100 F
µ
C1
22µF
+
CE
VDD
EXT
SW
NC
NC
D1
1N5819
VDD
EXT
SW
CE
NC
L1
D1
C1
NC
VIN
0.9V
GND
33 H
µ
SB02-03C
≧
10nF
NC
AIC1640
Q1
2SD2150
L1
V
IN
NC
GND
R1
88µH
≧0.9V
AIC1640
300
3.3V Output Step-Up DC/DC Converter
3.3V/100mA Step-Up DC/DC Converter
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
TEL: (8863)577-2500 FAX:(8863)577-2510
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