SNVS952F December   2012  – May 2021 LM25019

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Control Overview
      2. 7.3.2  VCC Regulator
      3. 7.3.3  Regulation Comparator
      4. 7.3.4  Overvoltage Comparator
      5. 7.3.5  On-Time Generator
      6. 7.3.6  Current Limit
      7. 7.3.7  N-Channel Buck Switch and Driver
      8. 7.3.8  Synchronous Rectifier
      9. 7.3.9  Undervoltage Detector
      10. 7.3.10 Thermal Protection
      11. 7.3.11 Ripple Configuration
      12. 7.3.12 Soft Start
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 RFB1, RFB2
        2. 8.2.2.2 Frequency Selection
        3. 8.2.2.3 Inductor Selection
        4. 8.2.2.4 Output Capacitor
        5. 8.2.2.5 Type III Ripple Circuit
        6. 8.2.2.6 VCC and Bootstrap Capacitor
        7. 8.2.2.7 Input Capacitor
        8. 8.2.2.8 UVLO Resistors
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

4 Revision History

Changes from Revision E (April 2015) to Revision F (May 2021)

  • Added "Synchronous Fly-Buck" to the title Go
  • Updated the numbering format for tables, figures, and cross-references throughout the document. Go

Changes from Revision D (December 2014) to Revision E (November 2015)

  • Changed 14 V to 13 V in VCC Regulator sectionGo
  • Changed 8 to 4 on equation in Input Capacitor sectionGo
  • Changed 0.06 μF to 0.12 μF in Input Capacitor sectionGo

Changes from Revision C (December 2013) to Revision D (November 2014)

  • 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 Go
  • Changed Soft-Start Circuit graphicGo
  • Changed Frequency Selection section, Inductor Selection section, Output Capacitor section, Input Capacitor section, and UVLO Resistors sectionGo
  • Changed Series Ripple Resistor RC section to Type III Ripple Circuit Go

Changes from Revision B (December 2013) to Revision C (December 2013)

  • Added Thermal Parameters Go

Changes from Revision A (September 2013) to Revision B (December 2013)

  • Changed formatting throughout document to the TI standardGo
  • Changed minimum operating input voltage from 9 V to 7.5 V in Features Go
  • Changed minimum operating input voltage from 9 V to 7.5 V in Typical Application Go
  • Added Absolute Maximum Junction TemperatureGo
  • Changed minimum operating input voltage from 9 V to 7.5 V in Recommended Operating Conditions Go

Changes from Revision * (December 2012) to Revision A (September 2013)

  • Added SW to RTN (100 ns transient) in Absolute Maximum Ratings tableGo