AP1538 DIODES [Diodes Incorporated], AP1538 Datasheet - Page 6

• Manufacturer Part Number: AP1538
• Description: 18V 3A 300KHz BUCK CONVERTER
• Manufacturer: DIODES [Diodes Incorporated]

Typical Performance Characteristics
AP1538 Rev. 2
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
326
324
322
320
318
316
314
312
310
308
306
100
0
90
80
70
60
50
40
30
20
10
0
0
0.0
2
2
(V
4
4
(V
OUT
V
IN
OUT
Line Regulation
= 3.3V, I
6
vs. Frequency
6
(V
Efficiency
1.0
= 3.3V, I
IN
= 12V)
8
V
8
V
OUT
IN
I
OUT
IN
(V)
OUT
(V)
= 0.2A)
10
(A)
10
= 0.2A)
12
12
2.0
VOUT=3.3V
VOUT=5V
14
14
www.diodes.com
16
16
6 of 14
3.0
18
18
0.820
0.815
0.810
0.805
0.800
0.795
0.790
0.785
0.780
3.35
3.34
3.33
3.32
3.31
3.30
3.29
3.28
3.27
3.26
3.25
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
18V 3A 300KHz BUCK CONVERTER
0.0
0
0
2
2
0.5
Switch Current Limit
(V
4
4
Load Regulation
OUT
1.0
(V
= 3.3V, I
(T
6
6
V
IN
A
IN
= 25C)
= 12V)
vs. V
I
OUT
8
V
V
8
1.5
IN
IN
OUT
(A)
(V)
(V)
FB
10
10
= 0.2A)
2.0
12
©
12
AP1538
ROCSET=6.8k
ROCSET=3.9k
Diodes Incorporated
14
JUNE 2008
14
2.5
16
16
3.0
18
18