SNVSCK4A April   2024  – August 2024 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
      2. 7.3.2 SENSE Hysteresis
      3. 7.3.3 Selecting the SENSE Delay Time
      4. 7.3.4 Selecting the RESET Delay Time
      5. 7.3.5 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

Package Options

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

7.3.2 SENSE Hysteresis

TPS3842-Q1 device offers built-in hysteresis around the UV threshold to avoid erroneous RESET deassert. The hysteresis (VHYS) is opposite to the threshold voltage for undervoltage options hysteresis is added to the negative threshold (VITN).

TPS3842-Q1 Hysteresis (Undervoltage Active-Low)Figure 7-4 Hysteresis (Undervoltage Active-Low)
Table 7-1 Common Adjustable Hysteresis Lookup Table
Part NumberDEVICE HYSTERESIS OPTION
TPS3842Axx1DRLRQ11%
TPS3842Axx5DRLRQ15%
TPS3842Axx0DRLRQ110%

Knowing the amount of hysteresis voltage, the release voltage for the undervoltage (UV) channel is (VITN + VHYS). Hysteresis is dependent on the device VITN including VITN accuracy and deviations.

Example: 1% hysteresis

VITN = 700mV

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

Release Voltage = VITN + VHYS = 707mV