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Texas Instruments TPS40003 manual PCB Layout, SLUU130A - September 2002 - Revised February

Models: TPS40003

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SLUU130A – September 2002 – Revised February 2003

7 PCB Layout

Figures 11 through13 show the top copper layer, the bottom copper layer, and top assembly layer, of SLUP182.

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TPS40003-Based 5-A Converter in Less Than One Square Inch

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Texas Instruments TPS40003 manual PCB Layout, SLUU130A - September 2002 - Revised February

Contents

User’s Guide TPS40003 Based 5-A Converter in Less Than One Square InchUser’s Guide EVM IMPORTANT NOTICE DYNAMIC WARNINGS AND RESTRICTIONS 5 PowerPAD Packaging 6 Test Results/Performance Data 7 PCB Layout 2 Features1 Introduction Contents 1 Introduction 2 Features 3 Schematic 4 Design ProcedureTPS40003-Based 5-A Converter in Less Than One Square Inch 3 SchematicFigure 1. Application Diagram for the TPS40002/3 SLUU130A - September 2002 - Revised February4.3 Input Capacitor Selection 4 Design Procedure4.1 TPS4000X Family Device Selection 4.2 Inductance Value4.4 Output Capacitor Selection 4.5 MOSFET Selection4.6 Short Circuit Protection R4 R5 4.7 Compensation Design2 p 2 p R10000 4.8 Snubber Component SelectionFigure 3. PowerPAD PCB Layout Guidelines 5 PowerPAD PackagingTPS40003-Based 5-A Converter in Less Than One Square Inch 6 Test Results/Performance DataThe test setup is shown in figure SLUU130A - September 2002 - Revised FebruaryTypical efficiency curves are shown in Figure 5 for an input of 3.3 OUTPUT VOLTAGE RIPPLE 10 mV/div t - Time - 500 ns/div SHORT CIRCUIT OPERATION 2 V/div t - Time - 1 ms/divTRANSIENT RESPONSE 50 mV/div t - Time - 20 ∝ s/div STARTUP WAVEFORM 1 V/div 500 mV/div 500 mV/div t - Time - 200 ∝ s/div7 PCB Layout SLUU130A - September 2002 - Revised FebruaryTPS40003-Based 5-A Converter in Less Than One Square Inch Reference 8 List of MaterialSLUU130A - September 2002 - Revised February 16 TPS40003-Based 5-A Converter in Less Than One Square InchIMPORTANT NOTICE