SNVSCK5B April   2024  – October 2025 TPS3842

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 6 Specification
    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 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Timing Diagram
    9. 6.9 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 SENSE Input
        1. 7.3.1.1 SENSE Hysteresis
      2. 7.3.2 Selecting the SENSE Delay Time
      3. 7.3.3 Selecting the RESET Delay Time
      4. 7.3.4 RESET Output
    4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Operation (VDD > VDD(min))
      2. 7.4.2 Above Power-On Reset but Less Than VDD(min) (VPOR < VDD < VDD(min))
      3. 7.4.3 Below Power-On Reset (VDD < VPOR)
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Meeting the Sense and Reset Delay
      3. 8.2.3 Application Curve
      4. 8.2.4 Power Supply Recommendations
      5. 8.2.5 Layout
        1. 8.2.5.1 Layout Guidelines
        2. 8.2.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Trademarks
    3. 9.3 Electrostatic Discharge Caution
    4. 9.4 Support Resources
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.3.1.1 SENSE Hysteresis

TPS3842 device offers built-in hysteresis around the VIT threshold to avoid erroneous RESET/RESET. The hysteresis (VHYS) is added to the negative thresholds (VITN) and subtracted for positive thresholds (VITP).

TPS3842 Hysteresis (Undervoltage Active-Low)Figure 7-6 Hysteresis (Undervoltage Active-Low)
TPS3842 Hysteresis (Overvoltage Active-High)Figure 7-8 Hysteresis (Overvoltage Active-High)
TPS3842 Hysteresis (Overvoltage Active-Low)Figure 7-7 Hysteresis (Overvoltage Active-Low)
Table 7-1 Common Adjustable Hysteresis Lookup Table
Part Number DEVICE HYSTERESIS OPTION
TPS3842xxx1DRLR 1%
TPS3842xxx5DRLR 5%
TPS3842xxx0DRLR 10%

Hysteresis is dependent on the device VIT including VIT accuracy and deviations.

Undervoltage (UV):

  • VITN = 700mV
  • Equation 2. Voltage Hysteresis (VHYS) = 1% = VITN × 1% = 7mV
  • Equation 3. Release Voltage = VITN + VHYS = 707mV

Overvoltage (OV):

  • VITP = 700mV
  • Equation 4. Voltage Hysteresis (VHYS) = 1% = VITN × 1% = 7mV
  • Equation 5. Release Voltage = VITP − VHYS = 693mV