Datasheet

MAX639/MAX640/MAX653
5V/3.3V/3V/Adjustable, High-Efficiency,
Low I
Q
, Step-Down DC-DC Converters
12 ______________________________________________________________________________________
8 CERDIP-55°C to +125°CMAX653MJA
8 SO-40°C to +85°CMAX653ESA
8 Plastic DIP-40°C to +85°CMAX653EPA
Dice*0°C to +70°CMAX653C/D
8 SO0°C to +70°CMAX653CSA
8 Plastic DIP0°C to +70°C
MAX653CPA
8 CERDIP-55°C to +125°CMAX640MJA
8 Plastic DIP-40°C to +85°CMAX640EPA
8 SO-40°C to +85°CMAX640ESA
Dice*0°C to +70°CMAX640C/D
8 SO0°C to +70°CMAX640CSA
8 Plastic DIP0°C to +70°C
MAX640CPA
PIN-PACKAGETEMP RANGEPART
_Ordering Information (continued)
*Contact factory for dice specifications.
___________________Chip Topography
VFB
V+
LBO
VOUT
SHDN
GND
0.083"
(2.108mm)
0.072"
(1.828mm)
LBI
LX
TRANSISTOR COUNT: 221
SUBSTRATE CONNECTED TO V+