LM5171 datasheet(2/89 Pages) TI2

2 / 89 page

Table of Contents

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

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

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

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

5 Specifications.................................................................. 6

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

5.2 ESD Ratings............................................................... 6

5.3 Recommended Operating Conditions.........................7

5.4 Thermal Information....................................................7

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

5.6 Timing Requirements................................................12

5.7 Typical Characteristics.............................................. 14

6 Detailed Description......................................................17

6.1 Overview................................................................... 17

6.2 Functional Block Diagram......................................... 18

6.3 Feature Description...................................................19

6.4 Device Functional Modes..........................................37

7 Registers........................................................................ 38

7.1 I2C Serial Interface....................................................38

7.2 I2C Bus Operation.....................................................38

7.3 Clock Stretching........................................................39

7.4 Data Transfer Formats..............................................39

7.5 Single READ From a Defined Register Address.......39

7.6 Sequential READ Starting From a Defined

7.7 Single WRITE to a Defined Register Address.......... 40

7.8 Sequential WRITE Starting From A Defined

7.9 REGFIELD Registers................................................41

8 Application and Implementation.................................. 46

8.1 Application Information............................................. 46

8.2 PWM to ISET Pins.................................................... 55

8.3 ISET Clamp...............................................................55

8.4 Dynamic Dead Time Adjustment...............................56

8.5 Proper Termination of Unused Pins.......................... 57

8.6 Typical Application.................................................... 58

8.7 Power Supply Recommendations.............................74

8.8 Layout....................................................................... 75

9 Device and Documentation Support............................79

9.1 Device Support......................................................... 79

9.2 Receiving Notification of Documentation Updates....79

9.3 Support Resources................................................... 79

9.4 Trademarks...............................................................79

9.5 Electrostatic Discharge Caution................................79

9.6 Glossary....................................................................79

10 Revision History.......................................................... 79

11 Mechanical, Packaging, and Orderable

Information.................................................................... 80

LM5171-Q1

SNVSC75B – APRIL 2023 – REVISED SEPTEMBER 2025

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