Fairchild SEMICONDUCTOR RC5040 User Manual
Page 6

AN42
APPLICATION NOTE
6
Figure 4. Synchronous DC-DC Converter Application Schematic Using RC5040
Figure 5. Non-Synchronous DC-DC Converter Application Schematic Using RC5042
VO
GND
VID3
VID2
VID1
VID0
8
7
6
5
4
3
2
1
9
10
11
12
13
14
15
16
17
18
19
20
VCC
PWRGD
RC5040
VCC
VCC
OUTEN
R5
10K
C10
0.1
µ
F
C11
0.22
µ
F
R6
10K
R4
10K
10K
10K
10K
R3
R2
R1
CEXT
39pF
C7
0.1
µ
F
C6
4.7
µ
F
DS1
1N5817
65-AP42-04
R7
10K
C1
1000
µ
F
C2
C3
1000
µ
F
1000
µ
F
C5
0.1
µ
F
DS2
1N5817
C12
1
µ
F
L1
1.3
µ
H
M1
2SK1388
M2
2SK1388
C8
C9
0.1
µ
F
0.1
µ
F
RSENSE
8m
Ω
1500
µ
F
C13
L2
2.6
µ
H
M3
2SK1388
VREF
C15
C14
1500
µ
F
1500
µ
F
C4
0.1
µ
F
VO
GND
VID3
VID2
VID1
VID0
VCC
PWRGD
RC5042
VCC
65-AP42-05
VCC
C10
0.1
µ
F
C11
0.22
µ
F
R6
10K
R4
10K
10K
10K
10K
R3
R2
R1
CEXT
39pF
C7
0.1
µ
F
C6
4.7
µ
F
DS1
MBR1545CT
R7
10K
1000
µ
F
C1
C2
C3
1000
µ
F 1000
µ
F
C5
0.1
µ
F
DS2
1N5817
C12
1
µ
F
L1
1.3
µ
H
M1
2SK1388
M2
2SK1388
C8
C9
0.1
µ
F
0.1
µ
F
RSENSE
8m
Ω
C14
1500
µ
F
1500
µ
F
C13
8
7
6
5
4
3
2
1
9
10
11
12
13
14
15
16
VREF
C15
1500
µ
F
L2
2.6
µ
H
C4
0.1
µ
F