Rainbow Electronics MAX8742 - Manual (Page 28)

MAX8741/
M
AX8742
500kHz Multi-Output Power-Supply Controllers
with High Impedance in Shutdown
28 ______________________________________________________________________________________
2.2µF
5
RESET
FB5
MAX8742
PGND
SEQ
REF
11
9
15
12
13
14
20
19
17
16 Q3
Q4
T2
1:2.2
R2
D5
D2
18
POWER-GOOD
7
10 8
5V ON/OFF
SKIP
DL5
LX5
DH5
BST5
V DD
2.2µF
0.1µF
C2
0.1µF
1µF
1N5819
5V OUTPUT
GND
2.5V REF
3
2
1
24
Q1
D1
Q2
L1
R1
0.1µF
0.1µF
1N5819
3.3V OUTPUT (3A)
ON/OFF
TIME/ON5
RUN/ON3
FB3
28
3V ON/OFF
26
25
27
CSL5
CSH5
CSL3
CSH3
DL3
LX3
DH3
BST3
SHDN
SYNC
INPUT
6.5V TO 28V
4
23
22
10Ω
6 21
V+ V L
0.1µF
0.1µF 4.7µF
4.7µF
12OUT
C3
C1
C4
TO 3.3V OUTPUT TO 5V OUTPUT
12V AT 120mA
5V ALWAYS ON
Figure 10. Triple-Output Application for the MAX8742