TPS40140

SLUS660I – SEPTEMBER 2005 – REVISED JANUARY 2015

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Table of Contents

8.4

Device Functional Modes........................................ 15

1

Features .................................................................. 1

9

Application and Implementation ........................ 16

2

Applications ........................................................... 1

9.1

Application Information............................................ 16

3

Description ............................................................. 1

9.2

Typical Application ................................................. 40

4

Revision History..................................................... 2

9.3

System Example ..................................................... 55

5

Device Comparison Table..................................... 3

10

Power Supply Recommendations ..................... 60

6

Pin Configuration and Functions ......................... 3

11

Layout................................................................... 60

7

Specifications......................................................... 5

11.1

Layout Guidelines ................................................. 60

7.1

Absolute Maximum Ratings ...................................... 5

11.2

Layout Example .................................................... 61

7.2

ESD Ratings.............................................................. 5

12

Device and Documentation Support ................. 62

7.3

Recommended Operating Conditions ...................... 5

12.1

Device Support...................................................... 62

7.4

Thermal Information .................................................. 6

12.2

Documentation Support ........................................ 63

7.5

Electrical Characteristics........................................... 6

12.3

Trademarks ........................................................... 63

7.6

Typical Characteristics .............................................. 9

12.4

Electrostatic Discharge Caution ............................ 63

8

Detailed Description ............................................ 12

12.5

Glossary ................................................................ 63

8.1

Overview ................................................................. 12

13

Mechanical, Packaging, and Orderable

8.2

Functional Block Diagram ....................................... 13

Information ........................................................... 63

8.3

Feature Description................................................. 13

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision H (June 2013) to Revision I

Page

•

Added ESD Ratings table, ESD Ratings table Feature Description section, Device Functional Modes, Application

and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation

Support section, and Mechanical, Packaging, and Orderable Information section ............................................................... 1

•

Changes from Revision G (July 2013) to Revision H

Page

•

Changed max Operating junction temperature from 125 to 150 in Absolute Maximum Ratings ........................................... 5

•

Changed switching frequency equation in Setting the Switching Frequency to match updated measurement................... 34

•

Changed Phase Frequency vs Timing Resistor curve in Setting the Switching Frequency to match updated

measurement........................................................................................................................................................................ 34

Changes from Revision F (September 2009) to Revision G

Page

•

Updated Thermal Information table ........................................................................................................................................ 6

•

Added clarity to Functional Block Diagram........................................................................................................................... 13

•

Added clarity to Figure 24..................................................................................................................................................... 26

•

Added clarity to Figure 25..................................................................................................................................................... 27

2

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