SNVSBY3A November   2020  – April 2021 TLV840-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  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 Timing Diagrams
    8. 7.8 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 Input Voltage (VDD)
        1. 8.3.1.1 VDD Hysteresis
        2. 8.3.1.2 VDD Transient Immunity
      2. 8.3.2 User-Programmable Reset Time Delay
      3. 8.3.3 Manual Reset (MR) Input
      4. 8.3.4 Output Logic
        1. 8.3.4.1 RESET Output, Active-Low
        2. 8.3.4.2 RESET Output, Active-High
    4. 8.4 Device Functional Modes
      1. 8.4.1 Normal Operation (VDD > VPOR)
      2. 8.4.2 Below Power-On-Reset (VDD < VPOR)
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design 1: Dual Rail Monitoring with Power-up Sequencing
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Application Curve: Adjusting Output Reset Delay on TLV840EVM
  10. 10Power Supply Recommendations
  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 Support Resources
    4. 12.4 Trademarks
  13. 13Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

9.2.1 Design 1: Dual Rail Monitoring with Power-up Sequencing

A typical application for the TLV840-Q1 is voltage rail monitoring and power-up sequencing as shown in
Figure 9-1. The TLV840-Q1 can be used to monitor any rail above 0.9 V. In this design application, two
TLV840-Q1 devices monitor two separate voltage rails and sequences the rails upon power-up. The TLV840MAPL29-Q1 is used to monitor the 3.3-V main power rail and the TLV840MADL10-Q1 is used to monitor the 1.2-V rail provided by the LDO for other system peripherals. The RESET output of the TLV840MAPL29-Q1 is connected to the enable (EN) input of the LDO. A reset event is initiated on either voltage supervisor when the VDD voltage is less than VIT-. For a system-wide reset event, both MR pins are tied to the SYS_RST. For the purpose of this application, the design detail on MR are not covered. For more information on the function of MR, please see Section 8.3.3

GUID-20201031-CA0I-3HVS-NCFQ-KDVZSND1HPMX-low.svg Figure 9-1 TLV840-Q1 Voltage Rail Monitor and Power-Up Sequencer Design Block Diagram