Basic Low Voltage Regulator using IC 723:

Fig. 2.112 shows the Basic Low Voltage Regulator using IC 723.

The resistor, R_sc is connected between CL and CS pins. The current limit transistor remains non-conductive unless drops across R_sc is 0.6 V (equal to V_BE drop). The value of R_sc can be found out by following equation

I_limit can be selected as 1.2 to 1.5 times the maximum load circuit. Potential divider made up of R₁ and R₂ is connected between V_ref and non-inverting terminals.

As the series pass transistor is working as emitter follower.

R₁ and R₂ can be between 1 kΩ to 10 kΩ.

Maximum load current can be 150 mA.