TIDUF54 August   2025

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 TPS6521905-Q1
      2. 2.3.2 LM74900-Q1
      3. 2.3.3 LMQ66430-Q1
      4. 2.3.4 TPS22995H-Q1
      5. 2.3.5 TPS51200A-Q1
      6. 2.3.6 TPS7B4255-Q1
      7. 2.3.7 MSPM0L1306-Q1
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Software Requirements
    3. 3.3 Test Setup
    4. 3.4 Test Results
      1. 3.4.1 LMQ66430-Q1
      2. 3.4.2 TPS65219-Q1
    5. 3.5 Quick Start Guide
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Tools and Software
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks

1 System Description

This reference design can power all rails of an automotive application processor directly from a standard 12V battery. The input to this system is protected by an LM74900-Q1 ideal diode, which provides reverse polarity protection with a low equivalent forward voltage (10.5mV). Undervoltage and overvoltage protection, overcurrent protection, current monitoring, and fault reporting are also provided in a small design with low-IQ size. The protected 12V is then sent to two voltage regulators: one LMQ66430-Q1 switching buck converter and one TPS7B4255-Q1 tracking LDO. The switching regulator provides a regulated 3.3V output to the TPS6521905-Q1 PMIC, two TPS22995H-Q1 load switches, and the TPS51200A-Q1 Double Data Rate (DDR) termination regulator. The LDO provides a stable 3.3V to the onboard MSPM0L1306-Q1 MCU.

This design focuses on compact size, minimal components, low electromagnetic interference (EMI), and affordability without sacrificing functionality or flexibility.