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AP1539 Datasheet(PDF) 6 Page - Diodes Incorporated

Part # AP1539
Description  18V 4A 300KHz BUCK CONVERTER
PDF  13 Pages
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Manufacturer  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

AP1539 Datasheet(HTML) 6 Page - Diodes Incorporated

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AP1539
18V 4A 300KHz BUCK CONVERTER
AP1539 Rev. 4
6 of 13
OCTOBER 2009
DS31477
www.diodes.com
© Diodes Incorporated
Typical Performance Characteristics
VIN vs. Frequency
(V
OUT = 3.3V , IOUT = 0.2A )
306
308
310
312
314
316
318
320
322
324
326
02468
10
12
14
16
18
V
IN (V )
VIN vs. VFB
(V
OUT = 3.3V , IOUT = 0.2A )
0.780
0.785
0.790
0.795
0.800
0.805
0.810
0.815
0.820
0
2
4
6
8
10
12
14
16
18
V
IN (V )
Line Regulation
(V
OUT = 3.3V , IOUT = 0.2A )
3.00
3.05
3.10
3.15
3.20
3.25
3.30
3.35
3.40
0246
8
10
12
14
16
18
V
IN (V )
Load Regulation
(V
IN = 12V )
3.25
3.26
3.27
3.28
3.29
3.30
3.31
3.32
3.33
3.34
3.35
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
I
OUT (A )
Efficiency
(V
IN = 12V )
0
10
20
30
40
50
60
70
80
90
100
0.0
1.0
2.0
3.0
4.0
I
OUT (A )
VOUT=3.3V
VOUT=5V
Switch Current Limit
(T
A = 25℃ )
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
0
2
4
6
8
10
12
14
16
18
V
IN (V )
ROCSET=6.8k
ROCSET=4.7k



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