MC34063A

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

9 of 9

www.unisonic.com.tw

QW-R103-008,I

DESIGN FORMULA TABLE

CALCULATION

STEP-DOWN

STEP-UP

VOLTAGE-INVERTING

1

1

4x10

4x10

4x10

- Saturation voltage of the output switch.

- Forward voltage drop of the ringback rectifier.

The following power supply characteristics must be chosen:

- Nominal input voltage.

- Desired output current.

due to the capacitor equivalent series resistance and board layout. The ripple voltage should be kept

to a low value since it will directly effect the line and load regulation.

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.