SNOSDD9 December   2022 LM7481

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 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Charge Pump
      2. 8.3.2 Dual Gate Control (DGATE, HGATE)
        1. 8.3.2.1 Reverse Battery Protection (A, C, DGATE)
        2. 8.3.2.2 Load Disconnect Switch Control (HGATE, OUT)
      3. 8.3.3 Overvoltage Protection and Battery Voltage sensing (VSNS, SW, OV)
      4. 8.3.4 Low Iq Shutdown and Undervoltage Lockout (EN/UVLO)
    4. 8.4 Device Functional Modes
    5. 8.5 Application Examples
      1. 8.5.1 Redundant Supply OR-ing With Inrush Current Limiting, Overvoltage Protection and ON/OFF Control
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical 12-V Reverse Battery Protection Application
      1. 9.2.1 Design Requirements for 12-V Battery Protection
      2. 9.2.2 Automotive Reverse Battery Protection
      3. 9.2.3 Detailed Design Procedure
        1. 9.2.3.1 Design Considerations
        2. 9.2.3.2 Charge Pump Capacitance VCAP
        3. 9.2.3.3 Input and Output Capacitance
        4. 9.2.3.4 Hold-up Capacitance
        5. 9.2.3.5 Overvoltage Protection and Battery Monitor
      4. 9.2.4 MOSFET Selection: Blocking MOSFET Q1
      5. 9.2.5 MOSFET Selection: Hot-Swap MOSFET Q2
      6. 9.2.6 TVS selection
      7. 9.2.7 Application Curves
    3. 9.3 Do's and Don'ts
    4. 9.4 Power Supply Recommendations
      1. 9.4.1 Transient Protection
      2. 9.4.2 TVS Selection for 12-V Battery Systems
      3. 9.4.3 TVS Selection for 24-V Battery Systems
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
      2. 9.5.2 Layout Example
  10. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

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

9.2.7 Application Curves

GUID-46C6FF80-C119-4059-B741-87292D39DB42-low.pngFigure 9-2 Startup 12 V with EN pulled to VIN
GUID-72C62D3E-04E2-45DA-97CF-B097F588C8D7-low.pngFigure 9-4 Reverse Input Voltage -12 V
GUID-0B0513B4-72C7-427A-B501-A11BB6C1C20C-low.pngFigure 9-6 Overvoltage Cut-off
GUID-EC22384A-7379-42CC-9DC1-5E2C3393BCD9-low.pngFigure 9-8 Turn ON with ENABLE Control
GUID-772125B7-4931-40C7-B78D-90CAD265667F-low.pngFigure 9-10 Disable Delay DGATE
GUID-99E34BD8-23E3-4B0E-92F2-FF15E86C2126-low.pngFigure 9-12 Enable Delay HGATE
GUID-9280783E-F65F-40A9-B513-0F1E5455F2FE-low.pngFigure 9-3 Startup 12 V showing Charge Pump VCAP
GUID-696FBEF6-6891-43D9-8F29-F0DF10CE2F61-low.pngFigure 9-5 Reverse Input Voltage -12 V for 60s
GUID-C48EBBBF-2AFB-4EEC-AFAE-2EF6E1B93134-low.pngFigure 9-7 Overvoltage Recovery
GUID-67D3E02B-B2D1-436B-81A9-8CE5006002E3-low.pngFigure 9-9 Turn OFF with ENABLE Control
GUID-FBC77474-945B-4511-BEB3-0D952EBF9527-low.pngFigure 9-11 Disable Delay HGATE
GUID-183589D2-D225-41E0-BCFD-D96D9866019E-low.pngFigure 9-13 Load Transient Response DGATE