In the simple voltage regulator shown in Figure P9.53, R must maintain the Zener diode current within its specified limits for all values of the source voltage, load current, and Zener diode voltage. Determine the minimum and maximum values of R that can be used.

Vz = 5 V ± 10% rz = 15 ?

|iz |min = 3.5 mA |iz |max = 65 mA

|vS| = 12 ± 3 V |io| = 70 ± 20 mA


Analysis:



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