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LM25019SDX データシート(PDF) 2 Page - Texas Instruments

部品番号 LM25019SDX
部品情報  100-mA Constant On-Time Synchronous Buck Regulator
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

LM25019SDX データシート(HTML) 2 Page - Texas Instruments

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LM25019
SNVS952E – DECEMBER 2012 – REVISED NOVEMBER 2015
www.ti.com
Table of Contents
7.3
Feature Description................................................. 10
1
Features .................................................................. 1
7.4
Device Functional Modes........................................ 15
2
Applications ........................................................... 1
8
Application and Implementation ........................ 16
3
Description ............................................................. 1
8.1
Application Information............................................ 16
4
Revision History..................................................... 2
8.2
Typical Application .................................................. 16
5
Pin Configuration and Functions ......................... 4
9
Power Supply Recommendations ...................... 20
6
Specifications......................................................... 5
10
Layout................................................................... 20
6.1
Absolute Maximum Ratings ..................................... 5
10.1
Layout Guidelines ................................................. 20
6.2
ESD Ratings.............................................................. 5
10.2
Layout Example .................................................... 20
6.3
Recommended Operating Conditions ....................... 5
11
Device and Documentation Support ................. 21
6.4
Thermal Information ................................................. 5
11.1
Documentation Support ........................................ 21
6.5
Electrical Characteristics........................................... 6
11.2
Community Resources.......................................... 21
6.6
Switching Characteristics .......................................... 6
11.3
Trademarks ........................................................... 21
6.7
Typical Characteristics .............................................. 7
11.4
Electrostatic Discharge Caution ............................ 21
7
Detailed Description .............................................. 9
11.5
Glossary ................................................................ 21
7.1
Overview ................................................................... 9
12
Mechanical, Packaging, and Orderable
7.2
Functional Block Diagram ......................................... 9
Information ........................................................... 21
4 Revision History
Changes from Revision D (December 2014) to Revision E
Page
Changed 14 V to 13 V in VCC Regulator section .................................................................................................................. 10
Changed 8 to 4 on equation in Input Capacitor section ....................................................................................................... 18
Changed 0.06
μF to 0.12 μF in Input Capacitor section ...................................................................................................... 18
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 Soft-Start Circuit graphic....................................................................................................................................... 14
Changed Frequency Selection section, Inductor Selection section, Output Capacitor section, Input Capacitor
section, and UVLO Resistors section ................................................................................................................................... 17
Changed Series Ripple Resistor RC section to Type III Ripple Circuit ................................................................................ 18
Changes from Revision B (December 2013) to Revision C
Page
Added Thermal Parameters .................................................................................................................................................. 5
Changes from Revision A (September 2013) to Revision B
Page
Changed formatting throughout document to the TI standard ............................................................................................... 1
Changed minimum operating input voltage from 9 V to 7.5 V in Features ........................................................................... 1
Changed minimum operating input voltage from 9 V to 7.5 V in Typical Application ........................................................... 1
Changed minimum operating input voltage from 9 V to 7.5 V in Pin Descriptions ............................................................... 4
Added Absolute Maximum Junction Temperature.................................................................................................................. 5
Changed minimum operating input voltage from 9 V to 7.5 V in Recommended Operating Conditions .............................. 5
2
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