Summit Microelectronics - Applications Note 35

This application note was jointly authored by Volterra Semiconductor and Summit Microelectronics.

Tech Support: Applications Note 35
Lossless Tracking Procedure and Results Summary
Reference Design: Volterra VT223 Regulator and SMT4214 TRAKKER™

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Lossless Tracking Procedure and Results Summary
Reference Design: Volterra VT223 Regulator and SMT4214 TRAKKER

PAGE 8

Table 1 - Bill of Materials

CONCLUSION

Advanced system designs demand precision control of the supply voltage power-on/off event. The required control circuitry must not use precious PCB space otherwise intended for the end product. Summit's Tracking Managers minimize PCB space while delivering precision performance in Tracking/Sequencing environments. Elimination of the series MOSFET, when used with premier voltage conversion devices such as the Volterra VT223 result in an easy to implement, reliable design. In this Application Note a single Volterra Step Down Converter was used with the SMT4214 and a series MOSFET to track/sequence another voltage (3.3V).

It must be noted that another VT223 could have generated the 3.3V supply in exactly the same manner as the 1.8V. In fact, a single SMT4214 can manage as many as four loss-less supply voltages. Using the Master/Slave capability of the SMT4214 allows up to 32 channels to be tracked and/or softstarted. Further information is contained in the links shown in Table 2 to Summit Microelectronics', Volterra Semiconductor Corp.'s and Xilinx Inc.'s web sites.

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SUMMIT Microelectronics, Inc. reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. SUMMIT Microelectronics, Inc. assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained herein reflect representative operating parameters, and may vary depending upon a user's specific application. While the information in this publication has been carefully checked, SUMMIT Microelectronics, Inc. shall not be liable for any damages arising as a result of any error or omission.

SUMMIT Microelectronics, Inc. does not recommend the use of any of its products in life support or aviation applications where the failure or malfunction of the product can reasonably be expected to cause any failure of either system or to significantly affect their safety or effectiveness. Products are not authorized for use in such applications unless SUMMIT Microelectronics, Inc. receives written assurances, to its satisfaction, that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; and (c) potential liability of SUMMIT Microelectronics, Inc. is adequately protected under the circumstances.

Revision 1.0 - This document supersedes all previous versions. Please check the Summit Microelectronics Inc. web site at www.summitmicro.com for updates.
"Xilinx" and the Xilinx logo are registered trademarks of Xilinx, Inc.
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Copyright © 2003 SUMMIT MICROELECTRONICS, Inc.
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