TWO_TERMINAL_100_mA_CURRENT_REGULATOR

Published:2009/6/23 4:14:00 Author:May | From:SeekIC

The circuit has a low temperature coefficient and operates down to 3 V. The reverse base current of the LM195 biases the circuit. A 2N2222 is used to control the voltage across current-sensing resistor, R2 and diode D1, and therefore the current through it. The voltage across the sense network is the VBE of the 2N2222 plus 1.2 V from the LM113. In the sense network, R2 sets the current and D1 compensates for the VBE of the transistor. Resistor R1 sets the current through the LM113 to 0.6 mA.



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