Texas Instruments TPS40003 List of Material, Reference Qty Description Manufacturer Part Number

Page 16

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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Page 15 Page 17
Contents User’s Guide EVM Important Notice Dynamic Warnings and Restrictions Features IntroductionSchematic Application Diagram for the TPS40002/3Design Procedure TPS4000X Family Device SelectionInductance Value Input Capacitor SelectionMosfet Selection Output Capacitor SelectionShort Circuit Protection Compensation Design Snubber Component Selection PowerPAD Packaging PowerPAD PCB Layout GuidelinesTest setup is shown in figure Test Results/Performance DataTypical Switch Node Waveform Efficiency Output CurrentShort Circuit Operation Output Voltage RippleStartup Waveform Transient ResponsePCB Layout List of Material Reference Qty Description Manufacturer Part NumberImportant Notice

TPS40003 specifications

The Texas Instruments TPS40003 is a versatile, high-performance synchronous buck controller designed to efficiently regulate output voltage in a range of applications. This device is particularly suited for power supply designs where space and efficiency are critical, such as telecommunications, industrial automation, and consumer electronics.

One of the standout features of the TPS40003 is its ability to operate over a wide input voltage range of 4.5V to 36V. This flexibility allows it to be effectively utilized in various scenarios, accommodating different power supply systems and ensuring compatibility with existing infrastructure. Furthermore, the output voltage can be adjusted down to as low as 0.8V, making it suitable for powering low-voltage microcontrollers and FPGAs.

The TPS40003 incorporates advanced voltage mode control, which enhances transient response and stability. This control method allows for quick adjustments in duty cycle in response to load changes, ensuring a steady output voltage even under varying loads. Coupled with a programmable soft-start feature, the controller minimizes inrush current during startup, protecting sensitive downstream components.

Another significant advantage of the TPS40003 is its integration of a high-side and low-side MOSFET driver. This synchronous operation significantly improves power efficiency by reducing conduction losses. The device operates with a high switching frequency, typically around 200 kHz, allowing for the use of smaller passive components and ultimately leading to a more compact design.

Thermal performance is another essential characteristic of the TPS40003. With built-in thermal shutdown and overcurrent protection features, it promotes reliable operation under various thermal conditions, enhancing the overall robustness of the power supply design. Additionally, the device's wide range of compensation options allows designers to fine-tune performance according to specific application requirements.

In terms of packaging, the TPS40003 is offered in a compact, thermally enhanced HTQFN package, which helps in conserving PCB space while maintaining efficient heat dissipation.

Overall, the Texas Instruments TPS40003 controller stands out as a robust, feature-rich solution for DC-DC conversion applications. With its wide operating voltage range, synchronous operation, and protective features, it provides designers with a reliable, efficient means of managing power in today's demanding electronic systems.
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