Input
CI
1
0.33µF
KA7805E
2
3
6
-2
KA741
+3
4
Output
10KΩ
CO
0.1µF
IRI ≥ 5 IQ
VO = VXX(1 + R2 / R1) + IQR2
Figure 13. Adjustable Output Regulator (7 to 30V)
Input
VI
IQ1
R1
1
3
KA78XXE
3Ω
IREG
2
0.33µF
Output
IO
Vo
0.1µF
IO = IREG + BQ1 (IREG–VBEQ1/R1)
Figure 14. High Current Voltage Regulator
Input
Q1
VI
Q2
R1
3Ω
Q1 = TIP42
Q2 = TIP42
RSC = VBEQ2
I SC
1 KA78XXE 3
0.33µF
2
0.1µF
Figure 15. High Output Current with Short Circuit Protection
Vo
Output
24
KA78XXE/KA78XXAE Rev. 1.0.1
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