SBVS286B March   2017  – July 2025 TPS3851-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Timing Diagrams
    8. 5.8 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 RESET
      2. 6.3.2 Manual Reset MR
      3. 6.3.3 UV Fault Detection
      4. 6.3.4 Watchdog Mode
        1. 6.3.4.1 CWD
        2. 6.3.4.2 Watchdog Input WDI
        3. 6.3.4.3 Watchdog Output WDO
        4. 6.3.4.4 SET1
    4. 6.4 Device Functional Modes
      1. 6.4.1 VDD is Below VPOR ( VDD < VPOR)
      2. 6.4.2 Above Power-On-Reset, But Less Than VDD(min) (VPOR ≤ VDD < VDD(min))
      3. 6.4.3 Normal Operation (VDD ≥ VDD(min))
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 CWD Functionality
        1. 7.1.1.1 Factory-Programmed Timing Options
        2. 7.1.1.2 Adjustable Capacitor Timing
      2. 7.1.2 Overdrive Voltage
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Monitoring the 1.8V Rail
        2. 7.2.2.2 Calculating the RESET and WDO Pullup Resistor
        3. 7.2.2.3 Setting the Watchdog
        4. 7.2.2.4 Watchdog Disabled During Initialization Period
      3. 7.2.3 Glitch Immunity
      4. 7.2.4 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Device Nomenclature
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

1 Features

  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • Functional Safety-Capable
  • Input voltage range: VDD = 1.6V to 6.5V
  • 0.8% Voltage threshold accuracy
  • Low supply current: IDD = 10µA (typical)
  • User-programmable watchdog timeout
  • Factory programmed precision watchdog and reset timers:
  • Manual reset input (MR)
  • Open-drain outputs
  • Precision undervoltage monitoring:
    • Supports common rails from 1.8V to 5.0V
    • 4% and 7% undervoltage thresholds available
    • 0.5% Hysteresis
  • Watchdog disable feature
  • Available in a small 3mm × 3mm, 8-Pin VSON package