Additional Application Circuits continued
+5V
+5V
+12V
+12V
+12V
R69
10K
Q4
2N2907
Q7
2N2907
R71
10K
C5
680mF
C4
680mF
C2
680mF
R76
1M
R75
1M
C1
R66
1M
R65
1M
680mF
R70
20K
R72
20K
R73
1K
R74
1K
+
-
+
-
C24
0.1mF
LM2903
U4B
LM2903
U4A
C25
0.1mF
Q1
FMMT2222ACT
R77
15K
R78
15K
R67
15k
m1
R68
15k
CS5127
C3
16
15
1
V
SYNC
IN
1mF
+
2
3
V
CT
RT
V
REF
R1
14
13
+
C8
1mF
20K
ENABLE
C7
330PF
C9
4
5
6
0.1mF
V
FB1
FB2
C6
0.1mF
12
11
COMP1
8
COMP2
V
Q3
V
FFB2
FFB1
Q2
IRL3103S
IRL3103S
C12
680mF 680mF
C13
GATE1
C10
680mF
7
8
GATE2
PGND
10
09
RDROOP
.008
RDROOP
3.3V
LGND
2.8V
L2
5mF
+
L1
5mH
+
.008
D2
+
R7
1N5821
2.40K
D1
1N5821
C11
680mF
R4
1.54K
R8
1.50K
R11
20K
R9
2K
R5
1.27K
20K
R10
R6
1K
C17
330PF
C14
330PF
C15
100mF
R3
18K
C16
100mF
2ª
Figure 17: 200kHz, V , 5V/12V input, 2.8V@ 7A and 3.3V @ 7A outputs with current limit.
+12V
+5V
+5V
C1
680mF
C2
680mF
C4
C5
+
680mF 680mF
C3
1mF
+
+
Q1
FMMT2222ACT
m1
CS5127
SYNC
1
2
16
15
V
IN
CT
RT
V
REF
ENABLE
3
4
14
13
R1
+
20K
C8
1mF
C7
330PF
R2
27K
V
V
FB1
FB2
C9
0.1mF
5
6
7
8
12
11
10
09
C6
COMP1 COMP2
Q3
IRL3103S
0.1mF
V
V
FFB2
FFB1
C10
C13
680mF
Q2
3.3V
680mF
L2
2.8V
GATE1
LGND
GATE2
PGND
IRL3103S
10mH
10mH
L1
+
+
D1
1N5821
D2
1N5821
C12
680mF
R17
2400
R4
1540
R7
2400
C11
680mF
R8
1500
R9
2K
R5
1270
R10
20K
R11
20K
R3
18K
C17
330pF
C16
100mF
C14
330pF
C15
100mF
U2A
R6
1K
8
1/2 LM358
Q4
IRL3103S
3
+
1
2
-
R18
2400
2.5V
4
C18
47mF
Figure 18: CS5127 12V, 5V input to 2.8V @7A and 3.3V @ 7A Switching Regulator with External 1A, 2.5V Linear Output for Vclock.
17
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
