Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences

of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted

by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject

to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not

authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.

The ST logo is a registered trademark of STMicroelectronics.

All other names are the property of their respective owners

© 2003 STMicroelectronics - All rights reserved

STMicroelectronics GROUP OF COMPANIES

Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -

Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States

www.st.com

19/19

AN458 APPLICATION NOTE

Figure 24. Multioutput not isolated

L4963 IN OFF-LINE POWER SUPPLY

The L4963 can be useful as post regulator in offline power supplies, where it can sobstitute the usual linear post

regulation increasing the efficiency and reducing the complexity of the transformer, if the distributed power sup-

ply approach is used (see fig.25).

Figure 25. Typical off-line solution using L4963 as post regulator.