JAJSSS6B January   2024  – June 2024 TPS7H3014-SP

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Device Options
  6. 5 Pin Configuration and Functions
  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 Timing Requirements
    7. 6.7 Quality Conformance Inspection
    8. 6.8 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Input Voltage (IN), VLDO and REFCAP
        1. 8.3.1.1 Undervoltage Lockout (VPOR_IN < VIN < UVLO)
        2. 8.3.1.2 Power-On Reset (VIN < VPOR_IN )
      2. 8.3.2 SENSEx Inputs
        1. 8.3.2.1 VTH_SENSEX and VONx
        2. 8.3.2.2 IHYS_SENSEx and VOFFx
        3. 8.3.2.3 Top and Bottom Resistive Divider Design Equations
      3. 8.3.3 Output Stages (ENx,SEQ_DONE,PWRGD,PULL_UP1 and PULL_UP2)
      4. 8.3.4 User-Programmable TIMERS
        1. 8.3.4.1 DLY_TMR
        2. 8.3.4.2 REG_TMR
      5. 8.3.5 UP and DOWN
      6. 8.3.6 FAULT
      7. 8.3.7 State Machine
    4. 8.4 Daisy Chain
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Self Contained – Sequence UP and DOWN
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Input Power Supplies and Decoupling Capacitors
          2. 9.2.1.2.2 UP and DOWN Thresholds
          3. 9.2.1.2.3 SENSEx Thresholds
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Sequencing of Negative Voltage Rails
        1. 9.2.2.1 Negative Voltage Design Equations
    3. 9.3 Externally Induced System RESET
    4. 9.4 Power Supply Recommendations
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
      2. 9.5.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 ドキュメントの更新通知を受け取る方法
    3. 10.3 サポート・リソース
    4. 10.4 Trademarks
    5. 10.5 静電気放電に関する注意事項
    6. 10.6 用語集
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information
9.2.1.2.1 Input Power Supplies and Decoupling Capacitors

The TPS7H3014 has three input power supplies:

  1. IN, the input supply to provide power to the TPS7H3014 IC. It is recommended to decouple this power supply with at least 1μF as close to the pin as possible. In this application, VIN = 12V.
  2. PULL_UP1, which is the input supply to program the output voltage high (VOH) of all the enable outputs (ENx). These outputs are connected to the regulator enable inputs to control the sequence up and down. It is recommended to decouple this power supply with at least 1μF as close to the pin as possible. In this application, the VPULL_UP1 = 3.3V. This is a typical voltage used in electronic systems and satisfies the logic inputs of most regulators in the market.
  3. PULL_UP2, which is the input supply to program the output voltage high (VOH) of PWRGD and SEQ_DONE outputs. These outputs are typically connected to the system controller (typically an FPGA or ASIC) and/or to the house-keeping controller. In daisy chain configurations, SEQ_DONE is connected to UP of subsequent TPS7H3014 I.C. as shown in Figure 8-15. It is recommended to decouple this power supply with at least 1μF as close to the pin as possible. In this application, the VPULL_UP1 = 3.3V. This is a typical voltage of controller I/Os.

The TPS7H3014 also has two regulated voltage outputs that need to be decoupled for good electrical and radiation performance. These are:

  1. REFCAP, the 1.2V reference, used internally in the device to generate all ratiometric voltage reference such as:
    • VTH_SENSEx
    • IHYS_SENSEx
    • VTH_UP
    • VTH_DOWN

    Decouple this reference with a 470nF ceramic capacitor as close to the pin as possible. Do not load this pin externally.

  2. VLDO, this is the output of the internal regulator used to provide power to the internal circuits on the TPS7H3014. Is recommended to decouple this regulator with at least 1μF as close to the pin as possible. The valid loading of this regulator is:
    • To turn-off channels 2–4 as needed.
    • To pull-up the FAULT open-drain output.