ZHCSQB8C July   2021  – December 2022 TPS38700-Q1

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Device Comparison
  6. 6 Pin Configuration and Functions
  7. 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 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Device State Diagram
      2. 8.3.2 Built-In Self Test and Configuration Load
      3. 8.3.3 CLK32K
      4. 8.3.4 BACKUP State
      5. 8.3.5 FAILSAFE State
      6. 8.3.6 Transitioning Sequences
        1. 8.3.6.1 Sequence 1: Power Up
        2. 8.3.6.2 Sequence 2: Emergency Power Down
        3. 8.3.6.3 Sequence 3: Sleep Entry
        4. 8.3.6.4 Sequence 4: Sleep Exit
        5. 8.3.6.5 Sequence 5 & 6: Power Down from Active and Sleep States
        6. 8.3.6.6 Sequence 7: Sleep Exit Due to NRST_IN
        7. 8.3.6.7 Sequence 8: RESET Due to NRST_IN
        8. 8.3.6.8 Sequence 9: Failsafe Power Down
        9. 8.3.6.9 Output Sequencing
      7. 8.3.7 I2C
    4. 8.4 Register Map Table
      1. 8.4.1 Register Descriptions
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Automotive Multichannel Sequencer and Monitor
      2. 9.2.2 Design Requirements
      3. 9.2.3 Detailed Design Procedure
      4. 9.2.4 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Power Supply Guidelines
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Nomenclature
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 支持资源
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 术语表
      1.      Mechanical, Packaging, and Orderable Information

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9.2.1 Automotive Multichannel Sequencer and Monitor

A typical application for the TPS38700-Q1 is shown in Figure 9-1. TPS38700-Q1 is used to provide the proper voltage sequencing for the target SOC device by providing enable signals to the DC/DC converters shown. These DC/DC converters are used to generate the appropriate voltage rails for the SOC. A mulitchannel voltage monitor is used to monitor the voltage rails as these rails power up and power down to ensure that the correct sequence occurs in both occasions. A safety microcontroller is also used to provide ACT, NIRQ, and I2C commands to the TPS38700-Q1 and the multichannel voltage monitor. The ACT signal from the safety microcontroller determines when the TPS38700-Q1 enters into ACTIVE or SHDN states while the NIRQ pin of the TPS38700-Q1 acts as an interrupt pin that is set when a fault has occurred. For instance, if an external device pulls the NRST pin low, then the TPS38700-Q1 will trigger an interrupt through the NIRQ pin. I2C is used to communicate the type of fault to the host microcontroller. The host microcontroller can clear the fault by writing 1 to the affected register. The power rails for the safety microcontroller are not shown in Figure 9-1 for simplicity.

Figure 9-1 TPS38700-Q1 Voltage Sequencer Design Block Diagram