SNVSCF0A October   2024  – December 2025 LM65680-Q1

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Related Products
  6. 5 Pin Configuration and Functions
    1. 5.1 Wettable Flanks
    2. 5.2 Pinout Design for Clearance and FMEA
  7. 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 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Descriptions
      1. 7.3.1  Input Voltage Range (VIN1, VIN2)
      2. 7.3.2  High-Voltage Bias Supply Subregulator (VCC, BIAS)
      3. 7.3.3  Precision Enable and Adjustable Input Voltage UVLO (EN/UVLO)
      4. 7.3.4  Output Voltage Setpoint (FB, BIAS)
      5. 7.3.5  Switching Frequency (RT)
      6. 7.3.6  Mode Selection and Clock Synchronization (MODE/SYNC)
        1. 7.3.6.1 Clock Synchronization
        2. 7.3.6.2 Clock Locking
      7. 7.3.7  Device Configuration (CNFG/SYNCOUT)
      8. 7.3.8  Dual-Random Spread Spectrum (DRSS)
      9. 7.3.9  High-Side MOSFET Gate Drive (BST)
      10. 7.3.10 Configurable Soft Start (SS)
        1. 7.3.10.1 Recovery From Dropout
      11. 7.3.11 Protection Features
        1. 7.3.11.1 Power-Good Monitor (PG)
        2. 7.3.11.2 Overcurrent and Short-Circuit Protection
        3. 7.3.11.3 Hiccup-Mode Protection
        4. 7.3.11.4 Thermal Shutdown
      12. 7.3.12 Two-Phase, Single-Output Operation
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Active Mode
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Power Train Components
        1. 8.1.1.1 Buck Inductor
        2. 8.1.1.2 Output Capacitors
        3. 8.1.1.3 Input Capacitors
        4. 8.1.1.4 EMI Filter
      2. 8.1.2 Error Amplifier and Compensation
      3. 8.1.3 Maximum Ambient Temperature
        1. 8.1.3.1 Derating Curves
    2. 8.2 Typical Applications
      1. 8.2.1 Design 1 – 5V, 8A Synchronous Buck Regulator With Wide Input Voltage Range and High Efficiency
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1  Custom Design With WEBENCH® Tools
          2. 8.2.1.2.2  Choosing the Switching Frequency
          3. 8.2.1.2.3  Buck Inductor Selection
          4. 8.2.1.2.4  Input Capacitor Selection
          5. 8.2.1.2.5  Output Capacitors
          6. 8.2.1.2.6  Output Voltage Setpoint
          7. 8.2.1.2.7  Compensation Components
          8. 8.2.1.2.8  Setting the Input Voltage UVLO
          9. 8.2.1.2.9  EMI Mitigation, RDRSS
          10. 8.2.1.2.10 Bootstrap Capacitor, CBST
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Design 2 – High Efficiency, 48V to 12V, 8A, 400kHz Synchronous Buck Regulator
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Buck Inductor Selection
          2. 8.2.2.2.2 Input Capacitor Selection
          3. 8.2.2.2.3 Output Capacitors
          4. 8.2.2.2.4 Output Voltage Setpoint
          5. 8.2.2.2.5 Compensation Components
          6. 8.2.2.2.6 Feedforward Capacitor
          7. 8.2.2.2.7 Soft-Start Capacitor
        3. 8.2.2.3 Application Curves
    3. 8.3 Best Design Practices
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
        1. 8.5.1.1 Thermal Design and Layout
      2. 8.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
      2. 9.1.2 Development Support
        1. 9.1.2.1 Custom Design With WEBENCH® Tools
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
        1. 9.2.1.1 Low-EMI Design Resources
        2. 9.2.1.2 Thermal Design Resources
        3. 9.2.1.3 Multiphase Design Resources
        4. 9.2.1.4 PCB Layout Resources
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Tape and Reel Information

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机械数据 (封装 | 引脚)
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订购信息

6.1 Absolute Maximum Ratings

Over the recommended operating junction temperature range of –40°C to 150°C (unless otherwise noted). (1)
MIN MAX UNIT
Input voltage VIN to PGND –0.3 72 V
EN/UVLO TO PGND –0.3 72 V
RT to PGND –0.3 72 V
DRSS/MCOMM to PGND –0.3 40 V
BIAS TO PGND –0.3 40 V
CNFG/SYNCOUT to PGND –0.3 5.5 V
Output voltage SW to PGND –0.6 VVIN V
PG to PGND –0.3 40 V
BST to SW –0.3 5.5 V
VCC to PGND –0.3 5.5 V
TJ Operating junction temperature –40 150 °C
Tstg Storage temperature –65 150 °C
(1) Operation outside the Absolute Maximum Ratings may cause permanent device damage. Absolute Maximum Ratings do not imply functional operation of the device at these or any other conditions beyond those listed under Recommended Operating Conditions. If used outside the Recommended Operating Conditions but within the Absolute Maximum Ratings, the device may not be fully functional, and this may affect device reliability, functionality, performance, and shorten the device lifetime.