Question 15.16: Determine the regulated output voltage of the circuit in Fig...
Determine the regulated output voltage of the circuit in Fig. 15.31 .
The output voltage calculated using Eq. (15.21)
V_{o}=V_{ ref }\left(1+\frac{R_{2}}{R_{1}}\right)+I_{ adj } R_{2} (15.21)
is
V_{o}=1.25 V \left(1+\frac{1.8 k \Omega}{240 \Omega}\right)+(100 \mu A )(1.8 k \Omega) \approx 1 0 . 8 ~ VA check of the filter capacitor voltage shows that an input–output difference of 2 V can be maintained up to at least 200 mA load current.
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