LM3420

SNVS116E – MAY 1998 – REVISED DECEMBER 2014

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Table of Contents

8.2

Functional Block Diagram ....................................... 10

1

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

8.3

Feature Description................................................. 10

2

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

8.4

Device Functional Modes........................................ 11

3

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

9

Application and Implementation ........................ 12

4

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

9.1

Application Information............................................ 12

5

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

9.2

Typical Application: Constant Current/Constant

6

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

Voltage Li-Ion Battery Charger ................................ 12

6.1

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

10

Power Supply Recommendations ..................... 17

6.2

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

11

Layout................................................................... 18

6.3

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

11.1

Layout Guidelines ................................................. 18

6.4

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

11.2

Layout Example .................................................... 18

6.5

LM3420 Electrical Characteristics............................. 5

12

Device and Documentation Support ................. 18

6.6

LM3420A Electrical Characteristics .......................... 6

12.1

Trademarks ........................................................... 18

6.7

Typical Characteristics .............................................. 7

12.2

Electrostatic Discharge Caution ............................ 18

7

Parameter Measurement Information .................. 9

12.3

Glossary ................................................................ 18

7.1

Test Circuits .............................................................. 9

13

Mechanical, Packaging, and Orderable

8

Detailed Description ............................................ 10

Information ........................................................... 19

8.1

Overview ................................................................. 10

4 Revision History

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

Changes from Revision D (May 2013) to Revision E

Page

•

Deleted info re: 4.2-V, 8.2-V, 12.6-V and 16.8 V versions .................................................................................................... 1

•

Added Device Information and ESD Ratings 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

Changes from Revision C (April 2013) to Revision D

Page

•

Changed layout of National Data Sheet to TI format ........................................................................................................... 13

2

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