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LM26480 Fiches technique(PDF) 2 Page - Texas Instruments |
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LM26480 Fiches technique(HTML) 2 Page - Texas Instruments |
2 / 42 page LM26480 SNVS543K – JANUARY 2008 – REVISED JANUARY 2015 www.ti.com 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 Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: LM26480 |
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