LT3092
200mA 2-Terminal
Programmable Current Source
FEATURES
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
outputcapacitors,offeringhighDCandACimpedance.This
feature allows operation in intrinsically safe applications.
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Programmable 2-Terminal Current Source
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Maximum Output Current: 200mA
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Wide Input Voltage Range: 1.2V to 40V
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Input/Output Capacitors Not Required
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Resistor Ratio Sets Output Current
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Initial Set Pin Current Accuracy: 1%
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Reverse-Voltage Protection
Reverse-Current Protection
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The SET pin features 1% initial accuracy and low tem-
perature coefficient. Current regulation is better than
10ppm/V from 1.5V to 40V.
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<0.001%/V Line Regulation Typical
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Current Limit and Thermal Shutdown Protection
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Available in 8-Lead SOT-23, 3-Lead SOT-223 and
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.
8-Lead 3mm × 3mm DFN Packages
APPLICATIONS
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2-Terminal Floating Current Source
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.
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GND Referred Current Source
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Variable Current Source
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In-Line Limiter
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Intrinsic Safety Circuits
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
SET Pin Current vs Temperature
V
– V
= 1.2V TO 40V
IN
OUT
10.100
10.075
10.050
10.025
10.000
9.975
IN
LT3092
10μA
+
–
SET
OUT
9.950
R
R
OUT
SET
9.925
3092 TA01a
9.900
–50 –25
25 50 75 100 125 150
TEMPERATURE (°C)
3092 TA01b
0
RSET
ROUT
ISOURCE = 10µA •
3092fb
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