MP1498 – SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS
R3
20
2
7
1
6
5
3
VIN
VCC
BST
SW
IN
C1
C1A
25V
C4
25V
L1
MP1498
GND
GND
C6
VOUT
1.8V /2A
VCC
SS
C2
GND
GND
C5
SS
GND
C3
15pF
R4
100K
R1
40.2K
R5
59K
GND
GND
8
EN/SYNC
FB
EN/SYNC
GND
GND
R2
32.4K
GND
Figure 10: VIN=12V, 1.8V/2A Output
R3
20
2
7
1
6
5
3
VIN
VCC
SS
BST
SW
IN
C1
C1A
25V
GND
C4
25V
L1
MP1498
GND
C6
VOUT
1.2V /2A
VCC
SS
C2
GND
C5
GND
GND
R4
100K
R1
30.1K
R5
140K
GND
GND
8
EN/SYNC
FB
EN/SYNC
GND
GND
R2
61.9K
GND
Figure 11: VIN=12V, 1.2V/2A Output
R3
20
2
7
1
6
5
3
VIN
VCC
BST
SW
IN
C1
25V
GND
C1A
25V
GND
C4
MP1498
L1
VOUT
1V /2A
VCC
SS
C6
C2
GND
C5
GND
SS
GND
R4
100K
R1
20.5K
R5
140K
GND
GND
8
EN/SYNC
FB
EN/SYNC
GND
GND
R2
84.5K
GND
Figure 12: VIN=12V, 1V/2A Output
MP1498 Rev. 1.01
12/18/2012
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17
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