LM5118, LM5118-Q1

SNVS566I – APRIL 2008 – REVISED AUGUST 2014

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Table of Contents

9.4

Device Functional Modes........................................ 20

1

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

10

Application and Implementation........................ 23

2

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

10.1

Application Information.......................................... 23

3

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

10.2

Typical Application ............................................... 23

4

Simplified Schematic............................................. 1

11

Power Supply Recommendations ..................... 34

5

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

11.1

Thermal Considerations ........................................ 34

6

Pin Configuration and Functions ......................... 4

11.2

Bias Power Dissipation Reduction ........................ 35

7

Specifications......................................................... 6

12

Layout................................................................... 37

7.1

Absolute Maximum Ratings ...................................... 6

12.1

Layout Guidelines ................................................. 37

7.2

Handling Ratings....................................................... 6

12.2

Layout Example .................................................... 37

7.3

Recommended Operating Conditions ....................... 6

13

Device and Documentation Support ................. 38

7.4

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

13.1

Related Links ........................................................ 38

7.5

Electrical Characteristics........................................... 7

13.2

Trademarks ........................................................... 38

8

Typical Characteristics........................................ 10

13.3

Electrostatic Discharge Caution ............................ 38

9

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

13.4

Glossary ................................................................ 38

9.1

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

14

Mechanical, Packaging, and Orderable

9.2

Functional Block Diagram ....................................... 12

Information ........................................................... 38

9.3

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

5 Revision History

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

Changes from Revision H (October 2013) to Revision I

Page

•

Changed data sheet flow and layout to conform with new TI standards. Added the following sections: Application

and Implementation; Power Supply Recommendations; Layout; Device and Documentation Support; Mechanical,

Packaging, and Ordering Information .................................................................................................................................... 1

•

Deleted footnote "These pins must not be raised above VIN." .............................................................................................. 6

Changes from Revision G (February, 2013) to Revision H

Page

•

•

Changed Figure 19 ............................................................................................................................................................... 24

•

Changed Inductor Selection Text ......................................................................................................................................... 26

•

Changed Equation 15 ........................................................................................................................................................... 26

•

Changed Equation 16 .......................................................................................................................................................... 26

•

Added Efficiency Parameter ................................................................................................................................................. 26

•

•

•

Changed R13 = RSENSEText ................................................................................................................................................ 27

•

Added Equation 19 .............................................................................................................................................................. 27

•

Added Equation 20 .............................................................................................................................................................. 27

•

Changed Equation 21 .......................................................................................................................................................... 27

•

Changed Equation 22 .......................................................................................................................................................... 27

•

•

•

Added Inductor Current Limit Calculation Section................................................................................................................ 28

•

Added Equation 24 .............................................................................................................................................................. 28

•

Added Equation 26 .............................................................................................................................................................. 28

•

Changed Equation 29 .......................................................................................................................................................... 28

2

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