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Texas Instruments TPS40090EVM-002 manual EVM Assembly Drawing and PCB Layout, SLUU195 − June

Models: TPS40090EVM-002

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SLUU195 − June 2004

8 EVM Assembly Drawing and PCB Layout

Figure 15. Top Side Component Assembly

Figure 16. Bottom Assembly

20TPS40090 Multi-Phase Buck Converter and TPS2834 Drivers Steps-Down from 12-V to 1.5-V at 100 A

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Texas Instruments TPS40090EVM-002 manual EVM Assembly Drawing and PCB Layout, Top Side Component Assembly . Bottom Assembly

Contents

User’s Guide Using the TPS40090EVM-002User’s Guide EVM IMPORTANT NOTICE DYNAMIC WARNINGS AND RESTRICTIONS Systems Power Contents 1 Introduction 2 Features 3 Schematic 4 Component Selection5 Test Setup 6 Test Results/Performance Data 7 Layout Considerations 8 EVM Assembly Drawing and PCB Layout 9 List of MaterialsFeatures SchematicTable 1. TPS40090EVM−002 Performance Summary SLUU195 − JuneSLUU195 − June TRANSEN4 Component Selection 4.1 Frequency of OperationIOUT 4.2 Inductance Value4.3 Input Capacitor Selection 4.4 Output Ripple Cancellation and Capacitor Selection k N PH, D + if N PH v 1, DI OUTD, DI OUT N PH, DFigure 5. Output Ripple Current Cancellation K N PH, D +0.6mH 4.5 MOSFET Selection4.6 Current Sensing 4.7 Overcurrent Limit Protection 2p R11 C11 4.8 Compensation Components+ 354 kHz 5 Test Setup Figure 7. Connections for the Test6.1 Efficiency and Power Loss 6 Test Results and Performance Data6.2 Closed-Loop Performance 6.3 Output Ripple and NoiseFigure 10. Bode Plot Figure 11. Output Noise6.4 Transient Response Figure 12. Transient ResponseFigure 14. J11 Open Circuit 6.5 Start up with Pre-Biased OutputFigure 13. J11 Short Circuit 7 Layout Considerations SLUU195 − June 8 EVM Assembly Drawing and PCB LayoutFigure 15. Top Side Component Assembly Figure 16. Bottom Assembly Figure 17. Top Side Copper Figure 18. Internal 1 Ground Plane SLUU195 − JuneFigure 19. Internal 2 Power Plane Figure 20. Internal SLUU195 − JuneFigure 21. Internal Figure 22. Bottom Layer Copper SLUU195 − JuneSLUU195 − June 9 List of MaterialsTable 2. List of Materials SLUU195 − June ReferenceDescription SizeApplications IMPORTANT NOTICEProducts