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LM3550

SNVS569C – MAY 2009 – REVISED OCTOBER 2016

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Table of Contents

1

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

2

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

3

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

4

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

5

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

6

Specifications......................................................... 4

6.1

Absolute Maximum Ratings ...................................... 4

6.2

ESD Ratings.............................................................. 4

6.3

Recommended Operating Conditions ....................... 4

6.4

Thermal Information .................................................. 4

6.5

Electrical Characteristics........................................... 5

6.6

Timing Requirements ................................................ 5

6.7

Typical Characteristics .............................................. 6

7

Detailed Description ............................................ 13

7.1

Overview ................................................................. 13

7.2

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

7.3

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

7.4

Device Functional Modes........................................ 16

7.5

Programming........................................................... 23

7.6

Register Maps ......................................................... 25

8

Application and Implementation ........................ 28

8.1

Application Information............................................ 28

8.2

Typical Application ................................................. 28

9

Power Supply Recommendations ...................... 35

10

Layout................................................................... 36

10.1

Layout Guidelines ................................................. 36

10.2

Layout Example .................................................... 36

11

Device and Documentation Support ................. 37

11.1

Device Support .................................................... 37

11.2

Related Documentation ....................................... 37

11.3

Receiving Notification of Documentation Updates 37

11.4

Community Resources.......................................... 38

11.5

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

11.6

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

11.7

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

12

Mechanical, Packaging, and Orderable

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

4 Revision History

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

Changes from Revision B (May 2013) to Revision C

Page

•

Changed title from "5-A Flash LED Driver With Automatic VLED and ESR Detection for Mobile Camera Systems" to "

5-A Super-Capacitor Flash LED Driver"; add top nav icon for reference design ................................................................... 1

•

Added new Applications: delete 'camera phones" ................................................................................................................ 1

•

Deleted redundant text from "Features" and "Description" so required content fits on page 1 ............................................ 1

•

Added "controller or"............................................................................................................................................................... 1

•

Added Device Information and Pin Configuration and Functions sections, ESD Ratings and Thermal Information

tables, Feature Description, Device Functional Modes, Application and Implementation, Power Supply

Recommendations, Layout, Device and Documentation Support, and Mechanical, Packaging, and Orderable

Information sections................................................................................................................................................................ 1

•

Deleted footnotes 1, 3, 4 from ROC table rows - no longer necessary ................................................................................ 4

•

Changed value for RθJA from "57°C/W" to "60.1°C/W"; add additional thermal values .......................................................... 4

•

Added "a controller" .............................................................................................................................................................. 13

•

Deleted "in the microcontroller/microprocessor.".................................................................................................................. 13

Changes from Revision A (May 2013) to Revision B

Page

•

Changed layout of National Semiconductor data sheet to TI format.................................................................................... 32