SNVSBD9E august   2020  – august 2023 TPS37-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Device Comparison
  7. 6 Pin Configuration and Functions
  8. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Timing Diagrams
    8. 7.8 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Input Voltage (VDD)
        1. 8.3.1.1 Undervoltage Lockout (VPOR < VDD < UVLO)
        2. 8.3.1.2 Power-On Reset (VDD < VPOR )
      2. 8.3.2 SENSE
        1. 8.3.2.1 SENSE Hysteresis
      3. 8.3.3 Output Logic Configurations
        1. 8.3.3.1 Open-Drain
        2. 8.3.3.2 Push-Pull
        3. 8.3.3.3 Active-High (RESET)
        4. 8.3.3.4 Active-Low (RESET)
      4. 8.3.4 User-Programmable Reset Time Delay
        1. 8.3.4.1 Reset Time Delay Configuration
      5. 8.3.5 User-Programmable Sense Delay
        1. 8.3.5.1 Sense Time Delay Configuration
      6. 8.3.6 Manual RESET (CTR1 / MR) and (CTR2 / MR) Input
  10. 9 Device Functional Modes
  11. 10Application and Implementation
    1. 10.1 Adjustable Voltage Thresholds
    2. 10.2 Application Information
    3. 10.3 Typical Application
      1. 10.3.1 Design 1: Automotive Off-Battery Monitoring
        1. 10.3.1.1 Design Requirements
        2. 10.3.1.2 Detailed Design Procedure
        3. 10.3.1.3 Application Curves
    4. 10.4 Power Supply Recommendations
      1. 10.4.1 Power Dissipation and Device Operation
    5. 10.5 Layout
      1. 10.5.1 Layout Guidelines
      2. 10.5.2 Layout Example
      3. 10.5.3 Creepage Distance
  12. 11Device and Documentation Support
    1. 11.1 Device Nomenclature
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary

Package Options

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

10.3.1.1 Design Requirements

This design requires voltage supervision on a 12 V power supply voltage rail with possibility of the 12 V rail rising up as high as 42 V. The undervoltage fault occurs when the power supply voltage drops below 7.7 V.

PARAMETER DESIGN REQUIREMENT DESIGN RESULT
Power Rail Voltage Supervision Monitor 12-V power supply for undervoltage condition, trigger a undervoltage fault at 7.7 V. TPS37-Q1 provides voltage monitoring with 1.5% max accuracy with adjustable/non-adjustable variations.
Maximum Input Power Operate with power supply input up to 42 V. The TPS37-Q1 can support a VDD of up to 65 V.
Output logic voltage Open-Drain Output Topology An open-drain output is recommended to provide the correct reset signal, but a push-pull can also be used.
Maximum system current consumption 2 µA max when power supply is at 12 V typical TPS37-Q1 allows for IQ to remain low with support of up to 65 V. This allows for no external resistor divider to be required.
Voltage Monitor Accuracy Maximum voltage monitor accuracy of 1.5%. The TPS37-Q1 has 1.5% maximum voltage monitor accuracy.
Delay when returning from fault condition RESET delay of at least 12.8 ms when returning from a undervoltage fault. CCTR = 10 nF sets 12.8 ms delay