© 2006 Fairchild Semiconductor Corporation

www.fairchildsemi.com

KA78XXE / KA78XXAE Rev. 1.9

21

Figure 9. Fixed Output Regulator

Figure 10. Constant Current Regulator

Notes:

33. To specify an output voltage, substitute voltage value for “XX”. A common ground is required between the input and

the output voltage. The input voltage must remain typically 2.0 V above the output voltage even during the low

point on the input ripple voltage.

Figure 11. Circuit for Increasing Output Voltage

0.1

μF

0.33

μF

Output

Input

KA78XXE

1

3

2

0.1

μF

0.33

μF

Output

Input

KA78XXE

1

3

2

Vxx

R1

1

Vxx

0.1

μF

0.33

μF

Output

Input

KA78XXE

1

3

2

Vxx

R1

R2

I

RI

5IQ

≥