LTC6101 datasheet(6/12 Pages) LINER

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LT6106

6106fa

BLOCK DIAGRAM

PIN FUNCTIONS

OUT (Pin 1): Current Output. OUT will source a current

that is proportional to the sense voltage into an external

resistor.

V– (Pin 2): Normally Connected to Ground.

–IN (Pin 3): The internal sense ampliﬁer will drive –IN to

the same potential as +IN. A resistor (RIN) tied from V+

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

is the voltage developed across RSENSE.

+IN (Pin 4): Must be tied to the system load end of the

sense resistor, either directly or through a resistor.

V+ (Pin 5): Positive Supply Pin. The V+ pin should be con-

nected directly to either side of the sense resistor, RSENSE.

Supply current is drawn through this pin. The circuit may

be conﬁgured so that the LT6106 supply current is or is

not monitored along with the system load current. To

monitor only the system load current, connect V+ to the

more positive side of the sense resistor. To monitor the

total current, including that of the LT6106, connect V+ to

the more negative side of the sense resistor.

V+

V–

OUT

6106 F01

VBATTERY

IOUT

VSENSE

RSENSE

ILOAD

ROUT

–

VOUT = VSENSE •

ROUT

RIN

14k

–IN

+IN

RIN

Figure 1. LT6106 Block Diagram and Typical Connection

TYPICAL PERFORMANCE CHARACTERISTICS

VSENSE (mV)

120

160

6106 G21

200

100

140

180

V+ = 12V

AV = 100

RIN = 100Ω

ROUT = 10k

VSENSE (mV)

200

400

600

800

6106 G22

1000

100

300

500

700

900

V+ = 12V

AV = 20

RIN = 500Ω

ROUT = 10k

Supply Current vs Supply Voltage

SUPPLY VOLTAGE (V)

100

6106 G01

515

120

TA = –40°C

TA = 25°C

TA = 70°C

TA = 125°C

Output Voltage vs Input Sense

Voltage (0mV ≤ VSENSE ≤ 1V)

Output Voltage vs Input Sense

Voltage (0mV ≤ VSENSE ≤ 200mV)

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