LT6106

1

6106fa

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

36V Low Cost High Side

Current Sense in a SOT-23

The LT

fier. Design flexibility is provided by the excellent device

characteristics: 250μV maximum offset and 40nA maxi-

mum input bias current. Gain for each device is set by two

resistors and allows for accuracy better than 1%.

The LT6106 monitors current via the voltage across an

external sense resistor (shunt resistor). Internal circuitry

converts input voltage to output current, allowing for a

small sense signal on a high common mode voltage to

be translated into a ground referenced signal. The low DC

offset allows for monitoring very small sense voltages. As

a result, a small valued shunt resistor can be used, which

minimizes the power loss in the shunt.

The wide 2.7V to 44V input voltage range, high accuracy

and wide operating temperature range make the LT6106

ideal for automotive, industrial and power management

applications. The very low power supply current of the

LT6106 also makes it suitable for low power and battery

operated applications.

■

Gain Configurable with Two Resistors

■

Low Offset Voltage: 250μV Maximum

■

Output Current: 1mA Maximum

■

Supply Range: 2.7V to 36V, 44V Absolute Maximum

■

Low Input Bias Current: 40nA Maximum

■

PSRR: 106dB Minimum

■

■

Operating Temperature Range: –40°C to 125°C

■

Low Profile (1mm) ThinSOT

■

Current Shunt Measurement

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Battery Monitoring

■

Power Management

■

Motor Control

■

Lamp Monitoring

■

Overcurrent and Fault Detection

LT6106

1k

200mV/A

6106 TA01a

100Ω

3V TO 36V

LOAD

0.02Ω

OUT

–IN

+IN

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the

property of their respective owners.

Measurement Accuracy vs Load Current

LOAD CURRENT (A)

0

–1.2

–1.0

–0.6

–0.4

–0.2

2

4

5

0.6

6106 TA01b

–0.8

13

0

0.2

0.4

LIMIT OVER TEMPERATURE

LIMIT OVER TEMPERATURE

5A FULL SCALE