LT6118_15 Datasheet, PDF (1/24 Pages) Linear Technology – Current Sense Amplifier, Reference and Comparator with POR

LT6118
Current Sense Amplifier,
Reference and Comparator
with POR
Features
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 Comparator}
– Power-On Reset Capability
– Fast Response Time: 500ns
– Total Threshold Error: ±1.25% Maximum
n _{Wide Supply Range: 2.7V to 60V}
n _{Supply Current: 450µA}
n _{Specified for –40°C to 125°C Temperature Range}
n _{Available in 8-Lead MSOP and 8-Lead (2mm × 3mm)}
DFN Packages
Applications
n _{Overcurrent and Fault Detection}
n _{Current Shunt Measurement}
n _{Battery Monitoring}
n _{Motor Control}
n _{Automotive Monitoring and Control}
n _{Industrial Control}
Description
The LT^®6118 is a complete high side current sense device
that incorporates a precision current sense amplifier, an
integrated voltage reference and a latching comparator.
The comparator latch functionality can be enabled or
disabled and the comparator can be configured to reset
upon power-on. The input and the open-drain output of
the comparator are independent from the current sense
amplifier. The comparator trip point and amplifier gain are
configured with external resistors.
The overall propagation delay of the LT6118 is typically only
1.4µs, allowing for quick reaction to overcurrent condi-
tions. The 1MHz bandwidth allows the LT6118 to be used
for error detection in critical applications such as motor
control. The high threshold accuracy of the comparator,
combined with the ability to latch the comparator, ensures
the LT6118 can capture high speed events.
The LT6118 is fully specified for operation from –40°C to
125°C, making it suitable for industrial and automotive
applications. The LT6118 is available in the small 8-lead
MSOP and 8-lead DFN packages.
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.
Typical Application
12V
6.2V*
Fast Acting Fault Protection with Power-On Reset
1k
3.3V
1k
10k
0.1Ω
100Ω
24.9k
SENSEHI SENSELO
V⁺
OUTA
LE LT6118
100nF
IRF9640
TO LOAD
0.1µF
V_OUT
6.04k
2N2700
OUTC
INC
250mA DISCONNECT
V^–
1.6k
*CMH25234B
6118 TA01a
Response to Overcurrent Event
V_LOAD
10V/DIV
0V
I_LOAD
200mA/DIV
0mA
V_OUTC
5V/DIV _0V
250mA DISCONNECT
5µs/DIV
6118 TA01b
6118f
For more information www.linear.com/LT6118
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