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

______________________________________________________________________________________

13

MAX4080

SYSTEM

LOAD

GND

RS-

RS+

OUT

Typical Operating Circuit

Chip Information

PROCESS: Bipolar

Selector Guide

MAX4081

GND

RS-

RS+

OUT

REF1A

REF1B

SYSTEM

POWER

MANAGEMENT

AND

CHARGER

CIRCUITRY

µC

1.8V

SERIAL

INTERFACE

BATTERY

Figure 5. MAX4081 Used In Smart-Battery Application

PART

GAIN (V/V)

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.