LTC6101/LTC6101HV
1
Rev I
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TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
High Voltage,
High-Side Current Sense
Amplifier in SOT-23
TO µP
6101 TA01
LTC2433-1
LTC6101HV
R
OUT
4.99k
R
IN
100Ω
V
OUT
V
+
V
–
OUT
–IN
+IN
V
SENSE
I
LOAD
5V TO 105V
1µF
5V
L
O
A
D
–
+
–
+
V
OUT
= • V
SENSE
= 49.9V
SENSE
R
OUT
R
IN
16-Bit Resolution Unidirectional Output into LTC2433 ADC
Step Response
5.5V
5V
0.5V
0V
500ns/DIV
6101 TA01b
T
A
= 25°C
V
+
= 12V
R
IN
= 100
R
OUT
= 5k
V
SENSE
+
= V
+
V
OUT
V
SENSE
–
ΔV
SENSE
–
= 100mV
I
OUT
= 100µA
I
OUT
= 0
The LTC
®
6101/LTC6101HV are versatile, high voltage, high
side current sense amplifiers. Design flexibility is provided
by the excellent device characteristics; 300μV Max offset
and only 375μA (typical at 60V) of current consumption.
The LTC6101 operates on supplies from 4V to 60V and
LTC6101HV operates on supplies from 5V to 100V.
The LTC6101 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. Low DC
offset allows the use of a small shunt resistor and large
gain-setting resistors. As a result, power loss in the shunt
is reduced.
The wide operating supply range and high accuracy make
the LTC6101 ideal for a large array of applications from
automotive to industrial and power management. A maxi-
mum input sense voltage of 500mV allows a wide range
of currents to be monitored. The fast response makes the
LTC6101 the perfect choice for load current warnings and
shutoff protection control. With very low supply current,
the LTC6101 is suitable for power sensitive applications.
The LTC6101 is available in 5-lead SOT-23 and 8-lead
MSOP packages.
n
Current Shunt Measurement
n
Battery Monitoring
n
Remote Sensing
n
Power Management
n
Supply Range:
5V to 100V, 105V Absolute Maximum (LTC6101HV)
4V to 60V, 70V Absolute Maximum (LTC6101)
n
Low Offset Voltage: 300μV Max
n
Fast Response: 1μs Response Time (0V to 2.5V on
a 5V Output Step)
n
Gain Configurable with 2 Resistors
n
Low Input Bias Current: 170nA Max
n
PSRR: 118dB Min
n
Output Current: 1mA Max
n
Low Supply Current: 250μA, V
S
= 12V
n
Specified Temperature Range: –40°C to 125°C
n
Operating Temperature Range: –55°C to 125°C
n
Package Option for High Voltage Spacing
n
Low Profile (1mm) SOT-23 (ThinSOT™) Package
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