LT6119-1/LT6119-2

1

611912f

For more information www.linear.com/LT6119-1

Typical applicaTion

FeaTures

DescripTion

Current Sense Amplifier,

Reference and Comparators

with POR

The LT®6119 is a complete high side current sense device

that incorporates a precision current sense amplifier, an

integratedvoltagereferenceandtwolatchingcomparators.

Two versions of the LT6119 are available. The LT6119-1

has the comparators connected in opposing polarity and

the LT6119-2 has the comparators connected in the same

polarity.Thecomparatorlatchfunctionalitycanbeenabled

ordisabledandthecomparatorscanbeconfiguredtoreset

upon power-on. The input and the open-drain outputs of

the comparators are independent from the current sense

amplifier. The comparator trip points and amplifier gain

are configured with external resistors.

The overall propagation delay of the LT6119 is typically

only 1.4µs, allowing for quick reaction to overcurrent and

undercurrent conditions. The 1MHz bandwidth allows the

LT6119 to be used for error detection in critical applica-

tions such as motor control. The high threshold accuracy

of the comparators, combined with the ability to latch

both comparators, ensures the LT6119 can capture high

speed events.

The LT6119 is fully specified for operation from –40°C

to 125°C, making it suitable for industrial and automo-

tive applications. The LT6119 is available in a small

10-lead MSOP.

Fast Acting Fault Protection with Power-On Reset and Early Warning

applicaTions

n

Current Sense Amplifier

– Fast Step Response: 500ns

– Low Offset Voltage: 200µV Maximum

– Low Gain Error: 0.2% Maximum

n

Internal 400mV Precision Reference

n

Internal Latching Comparators

– Power-On Reset Capability

– Fast Response Time: 500ns

– Total Threshold Error: ±1.25% Maximum

– Two Comparator Polarity Options

n

Wide Supply Range: 2.7V to 60V

n

Supply Current: 550µA

n

Specified for –40°C to 125°C Temperature Range

n

Available in 10-Lead MSOP Package

n

Overcurrent, Undercurrent and Fault Detection

n

Current Shunt Measurement

n

Battery Monitoring

n

Motor Control

n

Automotive Monitoring and Control

n

Industrial Control

L

, LT, LTC, LTM, TimerBlox, Linear Technology and the Linear logo are registered trademarks of

Linear Technology Corporation. All other trademarks are the property of their respective owners.

Response to Overcurrent Event

SENSEHI SENSELO

OUTA

LT6119-2

INC2

INC1

2N2700

100mA WARNING

250mA DISCONNECT

*CMH25234B

V+

LE

OUTC1

OUTC2

V–

0.1

IRF9640

3.3V

6.2V*

12V

100

6.04k

100k

1.62k

10k

1k

1k

0.1µF

VOUT

2.37k

1.6k

611912 TA01a

TO LOAD

24.9k

100nF

5µs/DIV

VLOAD

10V/DIV

VOUTC1

5V/DIV

ILOAD

200mA/DIV

0V

0V

VOUTC2

5V/DIV 0V

0mA

611912 TA01b

250mA DISCONNECT

100mA WARNING