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參數資料
| 型號： | AIC1640 |
| 廠商： | Analog Integrations Corporation |
| 英文描述： | LOW VOLTAGE STEP-UP DC/DC CONVERTER |
| 中文描述： | 低電壓升壓型DC / DC變換器 |
| 文件頁數： | 1/2頁 |
| 文件大?。?/td> | 45K |
| 代理商： | AIC1640 |
ADVANCE INFORMATION
AIC1640
LOW VOLTAGE STEP-UP DC/DC CONVERTER
SPEC NO: DS-1640-P1
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510
1
■
FEATURES
Guaranteed Start-Up from Below 0.9 V.
High Efficiency.
Low Quiescent Current.
Fixed or adjustable Output Voltage.
Logic Controlled Shutdown.
External Switch Driver available.
■
APPLICATIONS
Pagers.
Cameras.
Wireless Microphones.
Pocket Organizers.
Battery Backup Suppliers.
Portable Instruments.
■
DESCRIPTION
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.
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.
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.
■
TYPICAL APPLICATION CIRCUIT
+
C1
22
μ
F
L1
88
μ
H
D1
SB02-03C
AIC1640
GND
CE
NC
SW
EXT
VDD
VOUT
3.3V
V
IN
NC
NC
≧
0.9V
R1
300
C1
10nF
Q1
2SD2150
+
C2
100
μ
F
L1
33
μ
H
D1
1N5819
V
OUT
3.3V/100mA
V
IN
≧
0.9V
AIC1640
GND
CE
NC
SW
EXT
VDD
NC
NC
3.3V Output Step-Up DC/DC Converter
3.3V/100mA Step-Up DC/DC Converter
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