MAX730A/MAX738A/MAX744A
5V, Step-Down,
Current-Mode PWM DC-DC Converters
14 ______________________________________________________________________________________
1
2
3
4
8
7
6
5
V+
LX
GND
OUT
CC
SS
REF
SHDN
SO
MAX730A
TOP VIEW
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
V+
V+
LX
LX
N.C.
REF
V+
MAX738A
MAX744A
LX
GND
GND
OUT
CC
SS
N.C.
N.C.
Wide SO
SHDN
____Pin Configurations (continued) __Ordering Information (continued)
PART TEMP. RANGE PIN-PACKAGE
MAX738ACPA
0°C to +70°C 8 Plastic DIP
MAX738ACWE 0°C to +70°C 16 Wide SO
MAX738AC/D 0°C to +70°C Dice*
MAX738AEPA -40°C to +85°C 8 Plastic DIP
MAX738AEWE -40°C to +85°C 16 Wide SO
MAX738AMJA -55°C to +125°C 8 CERDIP
MAX744ACPA
0°C to +70°C 8 Plastic DIP
MAX744ACWE 0°C to +70°C 16 Wide SO
MAX744AC/D 0°C to +70°C Dice*
MAX744AEPA -40°C to +85°C 8 Plastic DIP
MAX744AEWE -40°C to +85°C 16 Wide SO
MAX744AMJA -55°C to +125°C 8 CERDIP
*Contact factory for dice specifications.
__________________________________________________________Chip Topographies
LX
GND
REF
SS
SHDN
V+
OUT
CC
0.131"
(3.327mm)
0.116"
(2.946mm)
LX
GND
REF
SS
SHDN
V+
OUT
CC
0.116"
(2.946mm)
0.072"
(1.828mm)
MAX730A
MAX738A/MAX744A
TRANSISTOR COUNT: 274 (MAX730A)
286 (MAX738A/MAX744A);
SUBSTRATE CONNECTED TO V+.
