SLVS165O April   1998  – March 2025 TPS3820 , TPS3823 , TPS3824 , TPS3825 , TPS3828

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics
    6. 6.6  Electrical Characteristics for TPS3823A-33 only
    7. 6.7  Timing Requirements
    8. 6.8  Switching Characteristics
    9. 6.9  Timing Diagram
    10. 6.10 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Manual Reset (MR)
      2. 7.3.2 Active-High or Active-Low Output
      3. 7.3.3 Push-Pull or Open-Drain Output
      4. 7.3.4 Watchdog Timer (WDI)
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Supply Rail Monitoring With Watchdog Time-Out and 200ms Delay
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Decoupling WDI During Reset Event
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Development Support
        1. 9.1.1.1 Spice Models
      2. 9.1.2 Device Nomenclature
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

7.1 Overview

The TPS382x family of supervisors provide circuit initialization and timing supervision. Optional configurations include devices with active-high and active-low output signals (TPS3824/5), devices with a watchdog timer (TPS3820/3/4/8), and devices with manual reset (MR) pins (TPS3820/3/5/8). RESET asserts when the supply voltage, VDD, rises above 1.1V. For devices with active-low output logic, the device monitors VDD and keeps RESET low as long as VDD remains below the negative threshold voltage, VIT−. For devices with active-high output logic, RESET remains high as long as VDD remains below VIT−. An internal timer delays the return of the output to the inactive state (high) to make sure proper system reset. The delay time, td, starts after VDD rises above the positive threshold voltage (VIT− + VHYS). When the supply voltage drops below VIT−, the output becomes active (low) again. All the devices of this family have a fixed-sense threshold voltage, VIT–, set by an internal voltage divider, so no external components are required.

The TPS382x family is designed to monitor supply voltages of 2.5V, 3V, 3.3V, and 5V. The devices are available in a 5-pin SOT-23 package and are characterized for operation over a temperature range of −40°C to 85°C. Only TPS3823A-33 is characterized for operation over a temperature range −40°C to 125°C.