SLVSGF1A october   2022  – june 2023 TPS3436-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 Switching Characteristics
    8. 7.8 Timing Diagrams
    9. 7.9 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagrams
    3. 8.3 Feature Description
      1. 8.3.1 Window Watchdog Timer
        1. 8.3.1.1 tWC (Close Window) Timer
        2. 8.3.1.2 tWO (Open Window) Timer
        3. 8.3.1.3 Watchdog Enable Disable Operation
        4. 8.3.1.4 tSD Watchdog Start Up Delay
        5. 8.3.1.5 SET Pin Behavior
      2. 8.3.2 Manual RESET
      3. 8.3.3 WDO Output
    4. 8.4 Device Functional Modes
  10. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Output Assert Delay
        1. 9.1.1.1 Factory-Programmed Output Assert Delay Timing
        2. 9.1.1.2 Adjustable Capacitor Timing
      2. 9.1.2 Watchdog Window Functionality
        1. 9.1.2.1 Factory-Programmed Timing Options
        2. 9.1.2.2 Adjustable Capacitor Timing
    2. 9.2 Typical Applications
      1. 9.2.1 Design 1: Monitoring a Microcontroller Watchdog During Operational and Sleep Modes
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Determining Window Timings During Operation and Sleep Modes
          2. 9.2.1.2.2 Meeting the Output Assert Delay
          3. 9.2.1.2.3 Calculating the WDO Pullup Resistor
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

8.4 Device Functional Modes

Table 8-5 summarizes the functional modes of the TPS3436-Q1.

Table 8-5 Device Functional Modes
VDD WATCHDOG STATUS WDI WDO
VDD < VPOR Not Applicable — Undefined
VPOR ≤ VDD < VDDmin Not Applicable Ignored High
VDD ≥ VDDmin Disabled Ignored High
Enabled tWC(max) ≤ tpulse1 ≤ tWC(max) + tWO(min) High
Enabled tWC(max) > tpulse1 Low
Enabled tWC(max) + tWO(max) < tpulse1 Low
(1) Where tpulse is the time between falling edges on WDI.