
AS1322
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
9 Application Information
The AS1322 is perfectly suited for LED matrix displays, bar-graph displays, instrument-panel meters, dot matrix displays, set-top boxes, white
goods, professional audio equipment, medical equipment, industrial controllers to name a few applications.
Along with Figure 1 on page 1 , Figures 16-19 depict a few of the many applications for which the AS1322 converters are perfectly suited.
Figure 16. Single AA Cell to 3.3V Synchronous Boost Converter with Load Disconnect in Shutdown
L1
4.7μH
1
SW
D1
6
5
V OUT
AA
Battery
C 1
4.7μF
V IN
AS1322
V OUT
C 2
4.7μF
R 3
510k ?
R 1
1.02M ?
3.3V, 160mA
1%
On
4
3
Off
SHDNN
2
GND
FB
R 2
604k ?
1%
Q1
R 3
510k ?
Figure 17. Single Lithium Cell to 5V, 250mA
Optional
L1
2 ?
100nF
Snubber
4.7μH
6
1
SW
D1
5
Lithium
Battery
C 1
V IN
V OUT
C 2
On
Off
4.7μF
4
SHDNN
AS1322
4.7μF
3
FB
R 1
1.02M ? 1%
C 3
100pF
www.ams.com/DC-DC_Step-Up/AS1322
2
GND
Revision 1.10
R 2
332k ? 1%
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