LM2578A, LM3578A

SNVS767E – AUGUST 2000 – REVISED APRIL 2013

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output capacitor than this theoretical value should be used since electrolytics have poor high frequency

performance. Experience has shown that a value from 5 to 10 times the calculated value should be used.

For good efficiency, the diodes must have a low forward voltage drop and be fast switching. 1N5819 Schottky

diodes work well.

high enough to prevent the output transistor switch from ramping higher than the transistor's rating of 750 mA.

Pulse Engineering (San Diego, Calif.) and Renco Electronics, Inc. (Deer Park, N.Y.) can provide further

assistance in selecting the proper transformer for a specific application need. The transformer used in Figure 36

was a Pulse Engineering PE-64287.

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