R2

1.25 1

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ö

-

+

ç

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ø

( )

out on

ripple pp

I

t

9

V

(

)

(

)

(

)

(

)

sat

in min

on max

pk switch

V

V

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æ

ö

-

ç

÷

ç

÷

ç

÷

è

ø

(

)

pk switch

0.3

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(

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on

out max

off

t

2I

1

t

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ö

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ç

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ø

5

on

4

10

t

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(

)

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off

off

t

t

t

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on

off

on

off

t

t

t

1

t

+

+

1

f

out

F

in

sat

V

V

V

V

+

-

MC33063A, MC34063A

www.ti.com

SLLS636N – DECEMBER 2004 – REVISED JANUARY 2015

Typical Application (continued)

9.2.1.1 Design Requirements

The user must determine the following desired parameters:

The following power-supply parameters are set by the user:

regulation and, thus, must be considered. In practice, the actual capacitor value should be larger than the

calculated value, to account for the capacitor's equivalent series resistance and board layout.

9.2.1.2 Detailed Design Procedure

CALCULATION

VOLTAGE INVERTING

See Figure 8

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