ZHCSLX4A October   2020  – December 2020 TPSM41615

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  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 Typical Characteristics (PVIN = 12 V)
    7. 6.7 Typical Characteristics (PVIN = 5 V)
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Setting the Output Voltage
      2. 7.3.2  RS+/RS- Remote Sense Function
      3. 7.3.3  Ramp Select (RAMP and RAMP_SEL)
      4. 7.3.4  Switching Frequency (RT)
      5. 7.3.5  Synchronization (SYNC)
        1. 7.3.5.1 Loss of Synchronization
      6. 7.3.6  Stand-alone/Stackable Operation
        1. 7.3.6.1 Stackable Synchronization
          1. 7.3.6.1.1 Sync Configuration
          2. 7.3.6.1.2 Clock Sync Point Selection
          3. 7.3.6.1.3 Configuration 1: Dual Phase, Primary Sync-Out Clock to Secondary
          4. 7.3.6.1.4 Configuration 2: Dual Phase, Primary and Secondary Sync to External System Clock
      7. 7.3.7  Improved Transient Performance versus Fixed Frequency (Stand-alone Operation Only)
      8. 7.3.8  Output On/Off Enable (EN)
      9. 7.3.9  Power Good (PGOOD)
      10. 7.3.10 Soft-Start Operation
      11. 7.3.11 Input Capacitor Selection
      12. 7.3.12 Output Capacitor Selection
      13. 7.3.13 Current Limit (ILIM)
      14. 7.3.14 Safe Start-up into Pre-Biased Outputs
      15. 7.3.15 Overcurrent Protection
      16. 7.3.16 Output Overvoltage and Undervoltage Protection
      17. 7.3.17 Overtemperature Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Active Mode
      2. 7.4.2 Shutdown Mode
  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 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Output Voltage Setpoint
        3. 8.2.2.3 Setting the Switching Frequency
        4. 8.2.2.4 RAMP Setting
        5. 8.2.2.5 Input Capacitors
        6. 8.2.2.6 Output Capacitors
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
      1. 10.2.1 Package Specifications
      2. 10.2.2 EMI
        1. 10.2.2.1 EMI Plots
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 Custom Design With WEBENCH® Tools
    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

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7.1 Overview

The TPSM41615 is a full-featured, 4-V to 16-V input, 15-A, synchronous step-down converter with PWM, MOSFETs, inductor, and control circuitry integrated into a QFN package. The device integration enables small designs, while still leaving the ability to adjust key parameters to meet specific design requirements. The TPSM41615 provides an output voltage range of 0.6 V to 7.1 V, with a selectable internal reference form 0.6 V to 1.1 V, for greater accuracy. An external resistor is used to adjust the output voltage to the desired output. The switching frequency is also adjustable by using an external resistor or a synchronization clock to accommodate various input and output voltage conditions and to optimize efficiency. Applications requiring increased current can benefit from the stackability (parallel outputs and phase-interleaving) of the TPSM41615 device.

The TPSM41615 has been designed for safe start-up into pre-biased loads. The EN pin has an internal pullup current source that can be used to adjust the input voltage undervoltage lockout (UVLO) with two external resistors. In addition, the internal pullup current of the EN pin allows the device to operate with the EN pin floating. The EN pin can also be pulled low to put the device in standby mode to reduce input quiescent current. The device provides a power-good (PGOOD) signal to indicate when the output voltage is within regulation. Thermal shutdown and current limit features protect the device during an overload condition. A 69-pin QFN package that includes exposed bottom pads provides a thermally-enhanced solution for space-constrained applications.