TIDUDT4A May   2018  – November 2021 AM3351 , AM3352 , AM3354 , AM3356 , AM3357 , AM3358 , AM3358-EP , AM3359

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
    1. 1.1 Key System Specifications
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Power Rails Requirements of the System
      2. 2.2.2 Power Sequencing Requirements of the System
      3. 2.2.3 Uncontrolled Power Off
      4. 2.2.4 12-V Input Voltage Rail
    3. 2.3 Highlighted Products
      1. 2.3.1 TLV62568/9
      2. 2.3.2 LM3881
      3. 2.3.3 TLV803
      4. 2.3.4 AM335x
      5. 2.3.5 WL1837MOD
    4. 2.4 System Design Theory
      1. 2.4.1 Power Tree Architecture
      2. 2.4.2 Power Sequencing Solution
        1. 2.4.2.1 Design Steps for DC-DCs
        2. 2.4.2.2 Design Steps for the Sequencer
        3. 2.4.2.3 Design Steps for the Supervisor
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Required Hardware and Software
      1. 3.1.1 Hardware
        1. 3.1.1.1 Connector Configuration of TIDA-01568
        2. 3.1.1.2 Procedure for Board Bring-up and Testing
      2. 3.1.2 Software
        1. 3.1.2.1 Description of Environment Implementation
        2. 3.1.2.2 How to Customize the Processor SDK for This Reference Design
      3. 3.1.3 Software Bring-up Tips
    2. 3.2 Testing and Results
      1. 3.2.1 Test Setup
      2. 3.2.2 Test Results
        1. 3.2.2.1 Power-Up and Power-Down Sequence Test
        2. 3.2.2.2 Typical Characteristics of DC-DCs
  9. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 PCB Layout Recommendations
      1. 4.3.1 PCB Layout Guidelines
      2. 4.3.2 Layout Prints
    4. 4.4 Altium Project
    5. 4.5 Gerber Files
    6. 4.6 Assembly Drawings
  10. 5Software Files
  11. 6Related Documentation
    1. 6.1 Trademarks
  12. 7About the Author
  13. 8Revision History

2.3.3 TLV803

The TLV803 family of supervisory circuits provides circuit initialization and timing supervision. The TLV853 and TLV863 are both functionally equivalent to the TLV803. These devices output a logic low when VDD drops below the negative-going threshold voltage (VIT–). The output, RESET, remains low for approximately 200 ms after the VDD voltage exceeds the positive-going threshold voltage (VIT– + Vhys). These devices are designed to ignore fast transients on the VDD pin.

Figure 2-6 shows the functional block diagram of the TLV803.

GUID-374F44F5-08FB-477C-A489-4DF78B6424B0-low.gifFigure 2-6 TLV803 Functional Block Diagram

Features:

  • 3-Pin SOT23 Package
  • Supply Current: 9 µA (Typical)
  • Precision Supply Voltage Monitor: 2.5 V, 3 V, 3.3 V, 5 V
  • Power-On Reset Generator with Fixed Delay Time of 200 ms
  • Temperature Range: –40°C to +125°C
  • Open-Drain, RESET Output