SNOSDD8 December   2022 LM7480

PRODUCTION DATA  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Switching Characteristics
    7. 7.7 Typical Characteristics
  8. Parameter Measurement Information
  9. Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Charge Pump
      2. 9.3.2 Dual Gate Control (DGATE, HGATE)
        1. 9.3.2.1 Reverse Battery Protection (A, C, DGATE)
        2. 9.3.2.2 Load Disconnect Switch Control (HGATE, OUT)
      3. 9.3.3 Overvoltage Protection and Battery Voltage Sensing (VSNS, SW, OV)
      4. 9.3.4 Low Iq Shutdown and Under Voltage Lockout (EN/UVLO)
    4. 9.4 Device Functional Modes
    5. 9.5 Application Examples
      1. 9.5.1 Redundant Supply OR-ing with Inrush Current Limiting, Overvoltage Protection and ON/OFF Control
      2. 9.5.2 Ideal Diode With Unsuppressed Load Dump Protection
  10. 10Applications and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical 12-V Reverse Battery Protection Application
      1. 10.2.1 Design Requirements for 12-V Battery Protection
      2. 10.2.2 Automotive Reverse Battery Protection
      3. 10.2.3 Detailed Design Procedure
        1. 10.2.3.1 Design Considerations
        2. 10.2.3.2 Charge Pump Capacitance VCAP
        3. 10.2.3.3 Input and Output Capacitance
        4. 10.2.3.4 Hold-Up Capacitance
        5. 10.2.3.5 Overvoltage Protection and Battery Monitor
      4. 10.2.4 MOSFET Selection: Blocking MOSFET Q1
      5. 10.2.5 MOSFET Selection: Hot-Swap MOSFET Q2
      6. 10.2.6 TVS Selection
      7. 10.2.7 Application Curves
    3. 10.3 200-V Unsuppressed Load Dump Protection Application
      1. 10.3.1 Design Requirements for 200-V Unsuppressed Load Dump Protection
      2. 10.3.2 Design Procedure
        1. 10.3.2.1 Boost Converter Components (C2, C3, L1)
        2. 10.3.2.2 Input and Output Capacitance
        3. 10.3.2.3 VS Capacitance, Resistor, and Zener Clamp
        4. 10.3.2.4 Overvoltage Protection and Output Clamp
        5. 10.3.2.5 MOSFET Q1 Selection
        6. 10.3.2.6 Input TVS Selection
        7. 10.3.2.7 MOSFET Q2 Selection
      3. 10.3.3 Application Curves
    4. 10.4 Do's and Don'ts
    5. 10.5 Power Supply Recommendations
      1. 10.5.1 Transient Protection
      2. 10.5.2 TVS Selection for 12-V Battery Systems
      3. 10.5.3 TVS Selection for 24-V Battery Systems
    6. 10.6 Layout
      1. 10.6.1 Layout Guidelines
      2. 10.6.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

Application Curves

GUID-E94FB4E3-9CE3-47F9-A6D1-92DD412A673E-low.pngFigure 10-2 Startup 12 V with EN Pulled to VIN
GUID-1171D67D-E6B9-4177-BB23-7D8CCD93A8FB-low.pngFigure 10-4 Reverse Input Voltage –14 V
GUID-E9177A30-A647-439E-9C73-AD48B76F1844-low.pngFigure 10-6 Inrush Current with no Load at Output
GUID-4FD08D6D-DD8D-439F-BA80-A41CCEB2444D-low.pngFigure 10-8 Hot-Plug into 12 V
GUID-3FA62BD5-6E5E-4202-A867-83F9B9325A03-low.pngFigure 10-10 DGATE Turn ON with Enable
GUID-D03610D6-8B78-4A74-9EAF-9281A9DB29A3-low.pngFigure 10-12 Turn OFF with Enable Control
GUID-AFDA2E95-A363-4592-BFCD-34386E8FE889-low.gifFigure 10-14 Overvoltage Recovery
GUID-FCDB2DC4-D185-469A-8E09-9C066BDDC5A8-low.pngFigure 10-16 Turn OFF Delay - DGATE
GUID-DE66BD75-7A78-40B8-976A-67461316DC1B-low.pngFigure 10-18 Load Transient 100 mA to 5 A
GUID-CEDBC2AF-63E3-4F10-8B57-486593E48060-low.pngFigure 10-3 Startup 12 V showing Charge Pump VCAP
GUID-D8206CF4-C424-4F34-9D0D-6DB51BF4A4B2-low.pngFigure 10-5 Reverse Input Voltage –14 V for 60 s
GUID-52F64560-F1B9-4381-8916-E88C31F43054-low.pngFigure 10-7 Inrush Current with 60-Ω Load
GUID-8557873D-28A9-487C-A27B-6184928C38F7-low.pngFigure 10-9 Output Turn ON with Enable
GUID-F571D2ED-5F4D-4C2A-BFA1-EFFFA0EFBC84-low.pngFigure 10-11 Turn ON with VCAP ON - EN rising from 0.8 V
GUID-DE5D8A88-A786-4AD3-9E3D-F66E108D1D0E-low.pngFigure 10-13 Overvoltage Protection
GUID-F2586823-F896-42A3-9E96-956056566EF1-low.pngFigure 10-15 Turn ON delay - HGATE
GUID-F3FD8105-B607-4E79-A816-B88F2FABDBC2-low.pngFigure 10-17 Turn OFF Delay - HGATE
GUID-84E92222-C785-4119-955A-6B99432001DE-low.pngFigure 10-19 Startup 1-A Load 1 ms After Output Powers Up