LM5019_15 Datasheet, PDF (2/30 Pages) Texas Instruments – 100-V, 100-mA Constant On-Time Synchronous Buck Regulator

LM5019
SNVS788F – JANUARY 2012 – REVISED DECEMBER 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ..................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions ...................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Switching Characteristics .......................................... 6
6.7 Typical Characteristics .............................................. 6
7 Detailed Description .............................................. 8
7.1 Overview ................................................................... 8
7.2 Functional Block Diagram ......................................... 8
7.3 Feature Description................................................... 9
7.4 Device Functional Modes........................................ 13
8 Application and Implementation ........................ 14
8.1 Application Information............................................ 14
8.2 Typical Application .................................................. 14
9 Power Supply Recommendations...................... 22
10 Layout................................................................... 22
10.1 Layout Guidelines ................................................. 22
10.2 Layout Example .................................................... 22
11 Device and Documentation Support ................. 23
11.1 Documentation Support ........................................ 23
11.2 Trademarks ........................................................... 23
11.3 Electrostatic Discharge Caution ............................ 23
11.4 Glossary ................................................................ 23
12 Mechanical, Packaging, and Orderable
Information ........................................................... 23
4 Revision History
Changes from Revision E (December 2013) to Revision F
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
• Added package designators to pin out drawings. ................................................................................................................. 3
• Changed Thermal Information table. ..................................................................................................................................... 4
• Added Timing Requirements table. ........................................................................................................................................ 6
• Changed Control Overview section ........................................................................................................................................ 9
• Changed Soft-Start Circuit graphic....................................................................................................................................... 13
• Changed Series Ripple Resistor R_C section to Type III Ripple Circuit ................................................................................ 15
• Changed Isolated Fly-Buck Converter graphic..................................................................................................................... 17
Changes from Revision D (December 2013) to Revision E
Page
• Added Thermal Parameters. .................................................................................................................................................. 4
Changes from Revision C (September 2013) to Revision D
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 ............................................................... 3
• Added Maximum Junction Temperature................................................................................................................................. 4
• Changed minimum operating input voltage from 9 V to 7.5 V in Recommended Operating Conditions. ............................. 4
Changes from Revision B (February 2012) to Revision C
Page
• Added SW to RTN (100 ns transient) in Absolute Maximum Ratings. .................................................................................. 4
2
Submit Documentation Feedback
Product Folder Links: LM5019
Copyright © 2012–2014, Texas Instruments Incorporated