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Texas Instruments TPS40003 manual List of Material, SLUU130A - September 2002 - Revised February

Models: TPS40003

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8 List of Material

SLUU130A – September 2002 – Revised February 2003

8 List of Material

Table 1 lists the components used in this design. With minor component tweaks this design could be modified to meet a wide range of applications.

Reference

Qty

Description

Manufacturer

Part Number

Capacitor	C1, C2, C5, C6	4	Ceramic, 22 ∝ F, 6.3 V, X5R, 20%, 1210	Panasonic	ECJ–4YB0J226M

	C10	1	Ceramic, 0.001 ∝ F, 10 V, X5R, 10%, 805	Panasonic	ECJ–2YB1A105K

	C11	1	Ceramic, 0.0047 ∝ F, 50 V, X7R, 10%	Vishay	VJ0603Y472KXAAT

	C12	1	Ceramic, 470 pF, 50 V, X7R, 10%	Vishay	VJ0603Y471KXAAT

	C3	1	Ceramic, 0.1 ∝ F, 50 V, X5R, 10%	Vishay	VJ0805Y104KXAAT

	C4	1	Ceramic, 0.001 ∝ F, 50 V, X7R, 10%	Vishay	VJ0603Y102KXAAT

	C8	1	Ceramic, 68 pF, 50 V, NPO, 10%	Vishay	VJ0603A680KXAAT

	C9	1	Ceramic, 0.0033 ∝ F, 50 V, X7R, 10%	Vishay	VJ0805Y332KXAAT

Terminal Block	J1, J2	2	2 pin, 15 A, 5.1 mm	OST	ED1609

Inductor	L1	1	SMT, 1.0 ∝ H, 8.5 A, 10 mΩ	Vishay	IHLP–2525CZ–01

MOSFET	Q1	1	Dual N–channel, 20 V, 9.4 A, 18 mΩ	Fairchild	FDS6898A

Resistor	R1	1	Chip, 15 kΩ , 1/16W, 1%	Std	Std

	R2	1	Chip, 8.66 kΩ , 1/16 W, 1%	Std	Std

	R3	1	Chip, 2.2 Ω , 1/10 W, 5%	Std	Std

	R4	1	Chip, 12.1 kΩ , 1/16 W, 1%	Std	Std

	R5	1	Chip, 1 kΩ , 1/16 W, 1%	Std	Std

	R6	1	Chip, 16.9 Ω , 1/16 W, 1%	Std	Std

	R7	1	Chip, 3.3 Ω , 1/16 W, 5%, 603	Std	Std

JACK	TP1, TP3, TP4,	5	Test point, red	Farnell	240–345

JACK	TP2, TP6	2	Test point, black	Farnell	240–333

Adaptor	TP5	1	3.5-mm probe clip (or 131–5031–00)	Tektronix	131–4244–00

Device	U1	1	Syncronous buck controller, 600 kHz	TI	TPS40003DGQ

16TPS40003-Based 5-A Converter in Less Than One Square Inch

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Texas Instruments TPS40003 manual List of Material, SLUU130A - September 2002 - Revised February, Reference, Description

Contents

TPS40003 Based 5-A Converter in Less Than One Square Inch User’s GuideUser’s Guide EVM IMPORTANT NOTICE DYNAMIC WARNINGS AND RESTRICTIONS 2 Features 1 IntroductionContents 1 Introduction 2 Features 3 Schematic 4 Design Procedure 5 PowerPAD Packaging 6 Test Results/Performance Data 7 PCB Layout3 Schematic Figure 1. Application Diagram for the TPS40002/3SLUU130A - September 2002 - Revised February TPS40003-Based 5-A Converter in Less Than One Square Inch4 Design Procedure 4.1 TPS4000X Family Device Selection4.2 Inductance Value 4.3 Input Capacitor Selection4.5 MOSFET Selection 4.4 Output Capacitor Selection4.6 Short Circuit Protection 4.7 Compensation Design 2 p2 p R R4 R54.8 Snubber Component Selection 100005 PowerPAD Packaging Figure 3. PowerPAD PCB Layout Guidelines6 Test Results/Performance Data The test setup is shown in figureSLUU130A - September 2002 - Revised February TPS40003-Based 5-A Converter in Less Than One Square InchTypical efficiency curves are shown in Figure 5 for an input of 3.3 SHORT CIRCUIT OPERATION 2 V/div t - Time - 1 ms/div OUTPUT VOLTAGE RIPPLE 10 mV/div t - Time - 500 ns/divSTARTUP WAVEFORM 1 V/div 500 mV/div 500 mV/div t - Time - 200 ∝ s/div TRANSIENT RESPONSE 50 mV/div t - Time - 20 ∝ s/divSLUU130A - September 2002 - Revised February 7 PCB LayoutTPS40003-Based 5-A Converter in Less Than One Square Inch 8 List of Material SLUU130A - September 2002 - Revised February16 TPS40003-Based 5-A Converter in Less Than One Square Inch ReferenceIMPORTANT NOTICE