TIDUF94 October   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 DP83TC818S-Q1 (Automotive SPE PHY)
      2. 2.3.2 TPS7B8233-Q1 (3.3V Vsleep Ultra-Low-IQ Low-Dropout Regulator)
      3. 2.3.3 TPS74701-Q1 (1.0V Rail Low-Dropout Regulator)
      4. 2.3.4 CDC6CE025000-Q1 (BAW Oscillator)
      5. 2.3.5 TPS4H160-Q1 (High-Side Switch)
  9. 3System Design Theory
    1. 3.1 Ethernet PHY
      1. 3.1.1 Ethernet PHY Power Supply
      2. 3.1.2 Ethernet PHY Clock Source
    2. 3.2 Power Coupling Network
      1. 3.2.1 High-Side Switch
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
    2. 4.2 Software Requirements
    3. 4.3 Test Setup
    4. 4.4 Test Results
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
    2. 5.2 Tools and Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author

2.3.3 TPS74701-Q1 (1.0V Rail Low-Dropout Regulator)

The TPS74701-Q1 low-dropout (LDO) linear regulator provides an easy-to-use, robust power management design for a wide variety of applications. The user-programmable soft-start minimizes stress on the input power source by reducing capacitive inrush current and the monotonic start-up is designed for powering many different types of processors and application-specific integrated circuits (ASIC). The enable input and power-good output allow easy sequencing with external regulators, allowing a design to be configured that meets the sequencing requirements for a wide range of applications with special start-up requirements.

A precision reference and error amplifier deliver 0.95% accuracy over load, line, temperature, and process. The device is stable with any type of capacitor greater than or equal to 2.2µF, and is fully specified per AEC-Q100.