LP8551

SNVS673E – APRIL 2010 – REVISED SEPTEMBER 2014

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Table of Contents

1

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

8

Detailed Description ............................................ 11

8.1

Overview ................................................................. 11

2

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

8.2

Functional Block Diagram ....................................... 11

3

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

8.3

Feature Description................................................. 12

4

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

8.4

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

5

Device Default Values ........................................... 3

8.5

Programming .......................................................... 21

6

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

8.6

Register Map........................................................... 25

7

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

9

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

7.1

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

9.1

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

7.2

Handling Ratings ...................................................... 5

9.2

Typical Applications ............................................... 34

7.3

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

10

Power Supply Recommendations ..................... 37

7.4

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

11

Layout................................................................... 38

7.5

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

11.1

Layout Guidelines ................................................. 38

7.6

Boost Converter Electrical Characteristics ............... 6

11.2

Layout Example .................................................... 40

7.7

LED Driver Electrical Characteristics ........................ 7

12

Device and Documentation Support ................. 41

7.8

PWM Interface Characteristics ................................. 7

12.1

Trademarks ........................................................... 41

7.9

Undervoltage Protection............................................ 8

12.2

Electrostatic Discharge Caution ............................ 41

7.10

Logic Interface Characteristics................................ 8

12.3

Glossary ................................................................ 41

7.11

13

Mechanical, Packaging, and Orderable

7.12

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

Information ........................................................... 41

4 Revision History

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

Changes from Revision D (January 2014) to Revision E

Page

•

Changed formatting to match new TI datasheet guidelines; added Device Information and Handling Ratings tables,

Layout, and Device and Documentation Support sections; reformatted Functional Description to Detailed

Description and Applications to Applications and Implementation sections, added note to beginning of Apps &

Implementations section; moved some waveforms to new Applications Plots subsection. .................................................. 1

Changes from Revision C (April 2013) to Revision D

Page

•

Added EEPROM note........................................................................................................................................................... 24

•

Added EEPROM note........................................................................................................................................................... 28

2

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