Owner manual

MAX8741/MAX8742
500kHz Multi-Output Power-Supply Controllers
with High Impedance in Shutdown
30 ______________________________________________________________________________________
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
RUN/ON3
DH3
LX3
BST3
DL3
SHDN
SEQ
V+
V
L
PGND
DL5
BST5
LX5
DH5
CSH5
CSL5
FB5
RESET
SKIP
REF
GND
TIME/ON5
SYNC
V
DD
12OUT
FB3
CSL3
CSH3
SSOP
MAX8742
TOP VIEW
SSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
RUN/ON3
DH3
LX3
BST3
DL3
SHDN
SEQ
V+
V
L
PGND
DL5
BST5
LX5
DH5
CSH5
CSL5
FB5
RESET
SKIP
REF
GND
TIME/ON5
SYNC
SECFB
STEER
FB3
CSL3
CSH3
MAX8741
32 31 30 29 28 27 26
N.C. FB3
CSL3 CSH3 RUN/ON3 DH3 LX3
25 N.C.
9
10 11 12 13 14 15
RESET
FB5
CSL5
CSH5
SEQ
DH5
LX5
16N.C.
17
18
19
20
21
22
23
BST5
DL5
PGND
V
L
V+
SHDN
DL3
8
7
6
5
4
3
2
SKIP
REF
N.C.
GND
TIME/ON5
SYNC
SECFB
MAX8741
THIN QFN 5mm × 5mm
1STEER
24 BST3
32 31 30 29 28 27 26
N.C. FB3
CSL3 CSH3 RUN/ON3 DH3 LX3
25 N.C.
9
10 11 12 13 14 15
RESET
FB5
CSL5
CSH5
SEQ
DH5
LX5
16N.C.
17
18
19
20
21
22
23
BST5
DL5
PGND
V
L
V+
SHDN
DL3
8
7
6
5
4
3
2
SKIP
REF
N.C.
GND
TIME/ON5
SYNC
V
DD
MAX8742
THIN QFN 5mm × 5mm
112OUT
24 BST3
Pin Configurations
Selector Guide
DEVICE AUXILIARY OUTPUT SECONDARY FEEDBACK
OVER/UNDERVOLTAGE
PROTECTION
MAX8741 None (SECFB input) Selectable (STEER pin) Yes
MAX8742 12V linear regulator Feeds into the 5V SMPS Yes