Texas Instruments SLVP089 manual Design Procedure

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Chapter 2

Design Procedure

There are many possible ways to proceed when designing power supplies. This chapter shows the procedure used in the design of the SLVP089. The chapter includes the following topics:

Topic		Page

2.1	Introduction	. . 2-2
2.2	Operating Specifications	. . 2-3
2.3	Design Procedures	. . 2-4

2-1

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Contents User’s Guide 07/98 Literature Number SLVU001A July Important Notice About This Manual Read This FirstTrademarks Contents Tables FiguresTopic HardwareTypical Synchronous Buck Converter IntroductionSchematic Diagram SchematicInput/Output Connections Power SupplyShows the SLVP089 board layout Board LayoutBill of Materials Bill of MaterialsLoad Regulation and Ripple, 3.3-V 9-V Input Test ResultsPower Switch Turn-On and Delay from Q2 Off Inductor and Output Ripple Page Design Procedure Introduction Operating Specifications Operating SpecificationsDuty Cycle Estimate Design Procedures+ 3 W Controller Functions + DD V O Compensation Network Bode Plot