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LM26420-Q0 Datasheet(PDF) 2 Page - Texas Instruments

No. de pieza LM26420-Q0
Descripción Electrónicos  Dual 2-A Automotive-Qualified, High-Efficiency Synchronous DC-DC Converter
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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LM26420-Q0 Datasheet(HTML) 2 Page - Texas Instruments

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LM26420, LM26420-Q0, LM26420-Q1
SNVS579K – FEBRUARY 2009 – REVISED APRIL 2016
www.ti.com
Product Folder Links: LM26420 LM26420-Q0 LM26420-Q1
Submit Documentation Feedback
Copyright © 2009–2016, Texas Instruments Incorporated
Table of Contents
1
Features .................................................................. 1
2
Applications ........................................................... 1
3
Description ............................................................. 1
4
Revision History..................................................... 2
5
Pin Configuration and Functions ......................... 4
6
Specifications......................................................... 6
6.1
Absolute Maximum Ratings ...................................... 6
6.2
ESD Ratings (LM26420X/Y) .................................... 6
6.3
ESD Ratings (Automotive-LM26420-Q0/Q1) ............ 6
6.4
Recommended Operating Conditions ....................... 6
6.5
Thermal Information .................................................. 6
6.6
Electrical Characteristics Per Buck ........................... 7
6.7
Typical Characteristics .............................................. 8
7
Detailed Description ............................................ 14
7.1
Overview ................................................................. 14
7.2
LM26420 Functional Block Diagram ....................... 15
7.3
Feature Description................................................. 15
7.4
Device Functional Modes........................................ 16
8
Application and Implementation ........................ 17
8.1
Application Information............................................ 17
8.2
Typical Applications ............................................... 20
9
Power Supply Recommendations ...................... 33
10
Layout................................................................... 34
10.1
Layout Guidelines ................................................. 34
10.2
Layout Example .................................................... 35
10.3
Thermal Considerations ........................................ 35
11
Device and Documentation Support ................. 38
11.1
Device Support...................................................... 38
11.2
Documentation Support ........................................ 38
11.3
Related Links ........................................................ 38
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 ........................................................... 39
4 Revision History
Changes from Revision J (September 2015) to Revision K
Page
Changed format of Features re: auto temperatures ............................................................................................................... 1
Changed RθJA value from 35°C/W to 38.5°C/W for PWP package and from 40°C/W to 36.2°C/W; replaced RθJC
values with 2 new rows (and new values); added additional thermal values......................................................................... 6
Changed "C1" to "C2" on Figure 42 ..................................................................................................................................... 20
Changed "C1" to "C2" on Figure 51 ..................................................................................................................................... 30
Deleted "C7" and "C8" from Table 6 ................................................................................................................................... 31
Changes from Revision I (June 2015) to Revision J
Page
fixed error in WQFN Pin Functions - shifted "Description" column down one row and added back description for
VIND1 pin ................................................................................................................................................................................ 4
Changed reference from "Typical Applications" to "Table 1". ............................................................................................. 23
Deleted definition for RDS (not part of equation 15) ............................................................................................................. 24
Changes from Revision H (August 2014) to Revision I
Page
Changed "Frequency" to "Efficiency" in title; add new Feature bullet re: CISPR25............................................................... 1
Added new Application .......................................................................................................................................................... 1
Changed moved Storage temperature to Absolute Maximum Ratings table ......................................................................... 6
Changed figure 36 caption .................................................................................................................................................. 14
Added part number to caption wording ................................................................................................................................ 15
Added application note ........................................................................................................................................................ 17
Changed title of Thermal Guidelines to Thermal Considerations and moved the section to the correct location................ 35
Added Related Documentation and Community Resources subsections ............................................................................ 38


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