LM26480

SNVS543K – JANUARY 2008 – REVISED JANUARY 2015

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Table of Contents

1

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

8

Detailed Description ............................................ 14

8.1

Overview ................................................................. 14

2

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

8.2

Functional Block Diagram ....................................... 14

3

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

8.3

Feature Description................................................. 14

4

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

8.4

Device Functional Modes........................................ 22

5

Device Options....................................................... 3

9

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

6

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

9.1

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

7

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

9.2

Typical Application ................................................. 25

7.1

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

10

Power Supply Recommendations ..................... 32

7.2

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

11

Layout................................................................... 33

7.3

Recommended Operating Conditions: Bucks ........... 6

11.1

Layout Guidelines ................................................. 33

7.4

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

11.2

Layout Example .................................................... 34

7.5

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

12

Device and Documentation Support ................. 35

7.6

Low Dropout Regulators, LDO1 and LDO2 .............. 7

12.1

Device Support .................................................... 35

7.7

Buck Converters SW1, SW2..................................... 8

12.2

Documentation Support ....................................... 35

7.8

I/O Electrical Characteristics ..................................... 9

12.3

Trademarks ........................................................... 35

7.9

Power On Reset Threshold/Function (POR)............. 9

12.4

Electrostatic Discharge Caution ............................ 35

7.10

Typical Characteristics — LDO............................. 10

12.5

Glossary ................................................................ 35

7.11

Typical Characteristics — Buck 2.8 V to 5.5 V ..... 11

13

Mechanical, Packaging, and Orderable

7.12

Typical Characteristics — Bucks 1 and 2 ............. 12

Information ........................................................... 35

7.13

Typical Characteristics — Buck 3.6 V................... 13

4 Revision History

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

Changes from Revision J (October 2014) to Revision K

Page

•

Changed Handling Ratings table to ESD Ratings table ........................................................................................................ 6

•

Added full Thermal Information values. .................................................................................................................................. 6

•

Added additional paragraph to Functional Description subsection to describe enable signal. ............................................ 15

Changes from Revision I (May 2013) to Revision J

Page

•

Added Device Information and ESD Rating tables, Feature Description, Device Functional Modes, Application and

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

Packaging, and Orderable Information sections; moved some curves to Application Curves section. ................................ 1

2

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