Additional Application Circuits continued
+5V
+12V
C4
C5
+5V
680mF 680mF
C1
680mF
C2
680mF
C3
1UF
+
+
+
m1
R1
3.3K
CS5127
SYNC
1
16
V
IN
2
3
15
14
V
CT
REF
+C8
1mF
R2
RT
ENABLE
100K
4
5
13
12
V
V
R3
FB1
FB2
C52
7pF
24K
C6
390pF
COMP1
COMP2
C7
7pF
6
7
11
10
Q2
IRL3103S
L2
V
V
FFB2
FFB1
Q1
IRL3103S
C13
680mF
C12
2.8V
C10
3.3V
R7
GATE1
680UF
680mF
GATE2
PGND
8
09
LGND
L1 5mH
5mH
+
+
D1
1N5821
D2
1N5821
R4
1540
C11
680mF
2400
R10
2K
R6
2K
R8
1500
C16
0.22mF
C50
0.22mF
R11
2.2K
R66
10
R65
18K
R7
10
C14
0.2mF
R5
1270
Q4
2N3906
Q7
2N3906
C17
0.2mF
C15
0.01mF
C24
0.01mF
R48
100K
C15
0.1mF
Figure 15: CS5127 12V, 5V input to 2.8V @ 7A and 3.3V @ 7A Voltage Mode Control Application Circuit with External Soft Start.
+12V
D3
1N5818
C1
680mF
C2
680mF
D4
1N5818
+
+
C18
0.1mF
R12
30
50V
Q1
FMMT2222ACT
m1
C4
C5
680mF 680mF
CS5127
1
2
16
SYNC
V
IN
C3
10mF
+
+
15
CT
RT
V
REF
ENABLE
C8
1mF
3
4
14
13
R1
20K
C7
330PF
R2
27k
V
V
D5
FB1
FB2
C9
0.1mF
1N5248
5
6
7
8
12
11
10
09
C6
0.1mF
COMP1 COMP2
Q3
IRL3103S
V
V
FFB2
FFB1
C10
680mF
C13
680mF
Q2
3.3V
R7
L2
2.8V
GATE1
LGND
GATE2
PGND
IRL3103S
5mH
5mH
L1
+
+
D1
1N5821
D2
1N5821
C12
R4
1540
C11
680mF
680mF
2400
R8
1500
R9
2K
R5
1270
R10
20K
R11
20K
R3
18K
C17
330PF
C16
100mF
C14
330PF
C15
100mF
R6
1K
Figure 16: CS5127 12V only to 2.8V @ 7A and 3.3V @ 7A Application Circuit.
16
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
