12_V_SHUNT_AT_5_mA

Published:2009/7/6 2:22:00 Author:May | From:SeekIC

Low-power shunt regulator uses opamp to absorb excess load current. Value of R1 is chosen to step up reference voltage of 5.6-V zener to +12V at 5 mA. Design procedure for other output voltages is given. Output impedance is 0.01 ohm at 100 Hz, giving 120-Hz ripple-frequency filtering comparable to that of 100,000-μF capacitor-W.G. Jung, IC Op-Amp Cookbook, Howard W.Sams, Indianapolis, IN, 1974, p 166-168.



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