SNVSCK4B April   2024  – October 2025 TPS3842-Q1

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 Diagram
    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
    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
    2. 9.2 Documentation Support
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.3.1.1 SENSE Hysteresis

TPS3842-Q1 device offers built-in hysteresis around the UV threshold to avoid erroneous RESET/RESET. The hysteresis (VHYS) is added to the negative thresholds (VITN) and subtracted for positive thresholds (VITP).

TPS3842-Q1 Hysteresis (Undervoltage Active-Low)Figure 7-6 Hysteresis (Undervoltage Active-Low)
TPS3842-Q1 Hysteresis (Overvoltage Active-High)Figure 7-8 Hysteresis (Overvoltage Active-High)
TPS3842-Q1 Hysteresis (Overvoltage Active-Low)Figure 7-7 Hysteresis (Overvoltage Active-Low)
Table 7-1 Common Adjustable Hysteresis Lookup Table
Part NumberDEVICE HYSTERESIS OPTION
TPS3842Axx1DRLRQ11%
TPS3842Axx5DRLRQ15%
TPS3842Axx0DRLRQ110%

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

Undervoltage (UV)

VITN = 700mV

Voltage Hysteresis (VHYS) = 1% = VITN x 1% = 7mV

Release Voltage = VITN + VHYS = 707mV

Overvoltage (OV)

VITP = 700mV

Voltage Hysteresis (VHYS) = 1% = VITN x 1% = 7mV

Release Voltage = VITP - VHYS = 693mV