LTC6103CMS8 datasheet(6/16 Pages) LINER

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LTC6103

6103f

BLOCK DIAGRAM

PIN FUNCTIONS

OUTA (Pin 1): Current Output of Ampliﬁer A. OUTA will

source a current that is proportional to the sense voltage

of ampliﬁer A into an external resistor.

OUTB (Pin 2): Current Output of Ampliﬁer B. OUTB will

source a current that is proportional to the sense voltage

of ampliﬁer B into an external resistor.

NC (Pin 3): No Connect.

V– (Pin 4): Negative Supply (or Ground for Single Supply

Operation). Common to both ampliﬁers.

+INB/VSB (Pin 5): The Positive Input of the Internal Sense

Ampliﬁer B. Must be tied to the system load end of the

sense resistor. It also works as the positive supply for

ampliﬁer B. Supply current of ampliﬁer B is drawn through

this pin. The LTC6103 supply current is monitored along

with the system load current.

–INB (Pin 6): The Negative Input of the Internal Sense

Ampliﬁer B. The internal sense ampliﬁer will drive –INB

to the same potential as +INB. A resistor (RIN) tied from

+ to –INB sets the output current IOUT = VSENSE/ RIN.

VSENSE is the voltage developed across the external RSENSE

(Figure 1).

–INA (Pin 7): The Negative Input of the Internal Sense

Ampliﬁer A. The internal sense ampliﬁer will drive –INA

to the same potential as +INA. A resistor (RIN) tied from

+ to –INA sets the output current IOUT = VSENSE/ RIN.

VSENSE is the voltage developed across the external RSENSE

(Figure 1).

+INA/VSA (Pin 8): The Positive Input of the Internal Sense

Ampliﬁer A. Must be tied to the system load end of the

sense resistor. It also works as the positive supply for

ampliﬁer A. Supply current of ampliﬁer A is drawn through

this pin. The LTC6103 supply current is monitored along

with the system load current.

Figure 1. LTC6103 Block Diagram and Typical Connection

–

+INA

OUTA

OUTB

6103 F01

VSB

VSA

ISA

ISB

IOUT

–INA

–INB

RIN

5k 5k

RIN

RSENSE

VSENSE

+–

VSENSE

–

+INB

V–

10V

ROUT

LOAD

ILOAD

ROUT

RIN

VOUT = VSENSE •

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