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
integrated voltage reference and two latching comparators.
Tw o 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. The comparator latch functionality can be enabled
or disabled and the comparators can be configured to reset
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
–
Tw o 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 , LT C , LT M , 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
INC12N2700
100mA WARNING
250mA DISCONNECT
*CMH25234B
V
+
LE
OUTC1
OUTC2
V
–
0.1Ω
IRF9640
3.3V
6.2V*
12V
100Ω
6.04k
100k
1.62k10k
1k
1k
0.1µF
V
OUT
2.37k
1.6k
611912 TA01a
TO LOAD
24.9k
100nF
5µs/DIV
V
LOAD
10V/DIV
V
OUTC1
5V/DIV
I
LOAD
200mA/DIV
0V
0V
V
OUTC2
5V/DIV
0V
0mA
611912 TA01b
250mA DISCONNECT
100mA WARNING