LT3092_15 Datasheet, PDF (1/22 Pages) Linear Technology – 200mA 2-Terminal Programmable Current Source

LT3092
200mA 2-Terminal
Programmable Current Source
FEATURES
n _{Programmable 2-Terminal Current Source}
n _{Maximum Output Current: 200mA}
n _{Wide Input Voltage Range: 1.2V to 40V}
n _{Input/Output Capacitors Not Required}
n _{Resistor Ratio Sets Output Current}
n _{Initial Set Pin Current Accuracy: 1%}
n _{Reverse-Voltage Protection}
n _{Reverse-Current Protection}
n _{<0.001%/V Line Regulation Typical}
n _{Current Limit and Thermal Shutdown Protection}
n _{Available in 8-Lead SOT-23, 3-Lead SOT-223 and}
8-Lead 3mm × 3mm DFN Packages
APPLICATIONS
n _{2-Terminal Floating Current Source}
n _{GND Referred Current Source}
n _{Variable Current Source}
n _{In-Line Limiter}
n _{Intrinsic Safety Circuits}
DESCRIPTION
The LT^®3092 is a programmable 2-terminal current
source. It requires only two resistors to set an output
current between 0.5mA and 200mA. A multitude of analog
techniques lend themselves to actively programming the
output current. The LT3092 is stable without input and
output capacitors, offering high DC and AC impedance. This
feature allows operation in intrinsically safe applications.
The SET pin features 1% initial accuracy and low tem-
perature coefficient. Current regulation is better than
10ppm/V from 1.5V to 40V.
The LT3092 can operate in a 2-terminal current source
configuration in series with signal lines. It is ideal for driv-
ing sensors, remote supplies, and as a precision current
limiter for local supplies.
Internal protection circuitry includes reverse-battery and
reverse-current protection, current limiting and thermal
limiting. The LT3092 is offered in the 8-lead TSOT-23,
3-lead SOT-223 and 8-lead 3mm × 3mm DFN packages.
L, LT, LTC, LTM, 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
Adjustable 2-Terminal Current Source
V_IN – V_OUT = 1.2V TO 40V
LT3092
IN
10μA
+
–
SET
OUT
R_SET
R_OUT
3092 TA01a
I_SOURCE
=
10µA
•
R_SET
R_OUT
SET Pin Current vs Temperature
10.100
10.075
10.050
10.025
10.000
9.975
9.950
9.925
9.900
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3092 TA01b
3092fb
1