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LM25018 Datenblatt(PDF) 2 Page - Texas Instruments

Teilenummer LM25018
Bauteilbeschribung  LM25018 48-V, 325-mA Constant On-Time Synchronous Buck Regulator
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Hersteller  TI [Texas Instruments]
Direct Link  http://www.ti.com
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LM25018 Datenblatt(HTML) 2 Page - Texas Instruments

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LM25018
SNVS953D – DECEMBER 2012 – REVISED DECEMBER 2014
www.ti.com
Table of Contents
7.3
Feature Description................................................... 9
1
Features .................................................................. 1
7.4
Device Functional Modes........................................ 13
2
Applications ........................................................... 1
8
Application and Implementation ........................ 14
3
Description ............................................................. 1
8.1
Application Information............................................ 14
4
Revision History..................................................... 2
8.2
Typical Application .................................................. 14
5
Pin Configuration and Functions ......................... 3
9
Power Supply Recommendations ...................... 23
6
Specifications......................................................... 4
10
Layout................................................................... 23
6.1
Absolute Maximum Ratings ..................................... 4
10.1
Layout Guidelines ................................................. 23
6.2
ESD Ratings ............................................................ 4
10.2
Layout Example .................................................... 23
6.3
Recommended Operating Conditions ....................... 4
11
Device and Documentation Support ................. 24
6.4
Thermal Characteristics ............................................ 4
11.1
Documentation Support ........................................ 24
6.5
Electrical Characteristics........................................... 5
11.2
Trademarks ........................................................... 24
6.6
Switching Characteristics .......................................... 5
11.3
Electrostatic Discharge Caution ............................ 24
6.7
Typical Characteristics .............................................. 6
11.4
Glossary ................................................................ 24
7
Detailed Description .............................................. 8
12
Mechanical, Packaging, and Orderable
7.1
Overview ................................................................... 8
Information ........................................................... 24
7.2
Functional Block Diagram ......................................... 8
4 Revision History
Changes from Revision C (December 2013) to Revision D
Page
Added Pin Configuration and Functions section, ESD Rating table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1
Changed VIN voltage in Typical Application ......................................................................................................................... 1
Changed max operating junction temperature in Recommended Operating Conditions table. ............................................ 4
Changed Soft-Start Circuit graphic....................................................................................................................................... 13
Changed Frequency Selection section, Inductor Selection section, Output Capacitor section, Input Capacitor
section, and UVLO Resistors section ................................................................................................................................... 15
Changed Series Ripple Resistor RC section to Type III Ripple Circuit ................................................................................ 16
Changes from Revision B (December 2013) to Revision C
Page
Added Thermal Parameters ................................................................................................................................................... 4
Changes from Revision A (September 2013) to Revision B
Page
Changed formatting throughout document to the TI standard ............................................................................................... 1
Changed minimum input voltage from 9 V to 7.5 V in Features ........................................................................................... 1
Changed minimum input voltage from 9 V to 7.5 V in Typical Application ........................................................................... 1
Changed minimum input voltage from 9 V to 7.5 V in Pin Descriptions ............................................................................... 3
Added Absolute Maximum Junction Temperature.................................................................................................................. 4
Changed minimum input voltage from 9 V to 7.5 V in Recommended Operating Conditions .............................................. 4
Changes from Original (December 2012) to Revision A
Page
Added SW to RTN (100 ns transient) in Absolute Maximum Ratings ................................................................................... 4
2
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