Datasheet

Power Management
The bidirectional capability of the MAX4081 makes it an
excellent candidate for use in smart battery packs. In
the application diagram (Figure 5), the MAX4081 moni-
tors the charging current into the battery as well as the
discharge current out of the battery. The microcon-
troller stores this information, allowing the system to
query the battery's status as needed to make system
power-management decisions.
76V, High-Side, Current-Sense Amplifiers with
Voltage Output
MAX4080
V
CC
= 4.5V TO 76V
R
SENSE
I
SENSE
SYSTEM
LOAD
V
CC
GND
RS-RS+
OUT
Typical Operating Circuit
Chip Information
PROCESS: Bipolar
Selector Guide
MAX4081
R
SENSE
V
CC
GND
RS-RS+
OUT
REF1A
REF1B
SYSTEM
POWER
MANAGEMENT
AND
CHARGER
CIRCUITRY
µC
1.8V
SERIAL
INTERFACE
BATTERY
MAX1243
ADC
Figure 5. MAX4081 Used In Smart-Battery Application
PART GAIN (V/V) I
SENSE
MAX4080FAUA 5 Unidirectional
MAX4080FASA 5 Unidirectional
MAX4080TAUA 20 Unidirectional
MAX4080TASA 20 Unidirectional
MAX4080SAUA 60 Unidirectional
MAX4080SASA 60 Unidirectional
MAX4081FAUA 5 Bidirectional
MAX4081FASA 5 Bidirectional
MAX4081TAUA 20 Bidirectional
MAX4081TASA 20 Bidirectional
MAX4081SAUA 60 Bidirectional
MAX4081SASA 60 Bidirectional
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
8 µMAX U8+1 21-0036 90-0092
8 SO S8+2 21-0041 90-0096
Ordering Information (continued)
PART TEMP RANGE PIN-PACKAGE
MAX4081FAUA+ -40°C to +125°C 8 µMAX
MAX4081FASA+ -40°C to +125°C 8 SO
MAX4081TAUA+ -40°C to +125°C 8 µMAX
MAX4081TASA+ -40°C to +125°C 8 SO
MAX4081SAUA+ -40°C to +125°C 8 µMAX
MAX4081SASA+ -40°C to +125°C 8 SO
+ Denotes a lead(Pb)-free/RoHS-compliant package.
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maxim-ic.com/packages
. Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
MAX4080/MAX4081
Maxim Integrated
13