Table of Contents

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

2 Applications..................................................................... 1

3 Description.......................................................................1

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

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

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

6.1 Absolute Maximum Ratings........................................ 7

6.2 ESD Ratings............................................................... 7

6.3 Recommended Operating Conditions.........................8

6.4 Thermal Information....................................................8

6.5 Electrical Characteristics.............................................9

6.6 Timing Requirements................................................13

6.7 Typical Characteristics.............................................. 14

7 Parameter Measurement Information.......................... 16

7.1 Gate Driver Rise Time and Fall Time........................16

7.2 Gate Driver Dead (Transition) Time.......................... 16

8 Detailed Description......................................................17

8.1 Overview................................................................... 17

8.2 Functional Block Diagram......................................... 18

8.3 Feature Description...................................................19

8.4 Device Functional Modes..........................................32

9 Application and Implementation.................................. 34

9.1 Application Information............................................. 34

9.2 Typical Application.................................................... 34

9.3 System Examples..................................................... 41

10 Power Supply Recommendations..............................44

11 Layout........................................................................... 45

11.1 Layout Guidelines................................................... 45

11.2 Layout Example...................................................... 46

12 Device and Documentation Support..........................47

12.1 Device Support....................................................... 47

12.2 Receiving Notification of Documentation Updates..47

12.3 Support Resources................................................. 47

12.4 Trademarks.............................................................47

12.5 Electrostatic Discharge Caution..............................47

12.6 Glossary..................................................................47

13 Mechanical, Packaging, and Orderable

Information.................................................................... 48

4 Revision History

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

Changes from Revision * (June 2022) to Revision A (October 2022)

Page

• Added item number 7 for power save mode to known sample limitations list ................................................... 6

• Changed equation for RT calculation................................................................................................................22

• Changed Functional Block Diagram of the Voltage and Peak Current Control Loop....................................... 23

• Changed description for negative current limit selection with SYNC-pin .........................................................27

• Changed equation for RT calculation................................................................................................................35

• Changed RC1 equation..................................................................................................................................... 39

LM5177

SNVSBU4A – JUNE 2022 – REVISED OCTOBER 2022

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