SNVSCG1 july   2023 TPS38700S-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Device Comparison
  7. 6 Pin Configuration and Functions
  8. 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
  9. 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 Sync Functionality
      3. 8.3.3 Transitioning Sequences
        1. 8.3.3.1 Power Up
        2. 8.3.3.2 Power Down
        3. 8.3.3.3 Emergency Power Down
      4. 8.3.4 BACKUP State
      5. 8.3.5 Thermal Shutdown (TSD) State
      6. 8.3.6 I2C
        1. 8.3.6.1 I2C
    4. 8.4 Register Map Table
      1. 8.4.1 Register Descriptions
  10. 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 Test Implementation
      5. 9.2.5 Application Curves
  11. 10Power Supply Recommendations
    1. 10.1 Power Supply Guidelines
  12. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  13. 12Device and Documentation Support
    1. 12.1 Device Nomenclature
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  14.   Mechanical, Packaging, and Orderable Information

Package Options

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

9.2.1 Automotive Multichannel Sequencer and Monitor

A typical application for the TPS38700S-Q1 is shown in Figure 9-12. TPS38700S-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 like the TPS389006-Q1 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. After a rail successfully powers up, a SYNC pulse will be need to be sent to TPS38700S-Q1 in order to bring up the subsequent power rail. A microcontroller is also used to provide ACT, NIRQ, and I2C commands to the TPS38700S-Q1 and the multichannel voltage monitor. The ACT signal from the microcontroller determines when the TPS38700S-Q1 enters into ACTIVE or SHDN states while the NIRQ pin of the TPS38700S-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 TPS38700S-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 microcontroller are not shown in Figure 9-12 for simplicity.

GUID-20230613-SS0I-SMLS-XNKR-HK6S1D7RVVT5-low.svg Figure 9-1 TPS38700S Voltage Sequencer Design Block Diagram