LT3092 - 200mA 2-Terminal Programmable Current Source - Linear Technology - #1

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LT3092 1 3092fb TYPICAL APPLICATION DESCRIPTION 200mA 2-Terminal Programmable Current Source 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 temperature coeffi cient. Current regulation is better than 10ppm/V from 1.5V to 40V. The LT3092 can operate in a 2-terminal current source confi guration in series with signal lines. It is ideal for driving 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. Adjustable 2-Terminal Current Source FEATURES APPLICATIONS 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 n 2-Terminal Floating Current Source n GND Referred Current Source n Variable Current Source n In-Line Limiter n Intrinsic Safety Circuits SET Pin Current vs Temperature 3092 TA01a IN SET OUT + – LT3092 10ìA RSET ROUT VIN – VOUT = 1.2V TO 40V I ìA R SOURCE R SET OUT = 10 • TEMPERATURE (°C) –50 9.900 SET PIN CURRENT (ìA) 9.950 10.000 10.050 –25 0 25 50 75 100 125 10.100 9.925 9.975 10.025 10.075 150 3092 TA01b 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.