SBVS272B November   2015  – December 2023 TPS3711

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings #GUID-795AD25B-5DDA-4725-83BA-87F5B93DF96A/ABSMAXNOTE
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Input Pin (SENSE)
      2. 6.3.2 Output Pin (OUT)
    4. 6.4 Device Functional Modes
      1. 6.4.1 Normal Operation (VDD > UVLO)
      2. 6.4.2 Undervoltage Lockout (V(POR) < VDD < UVLO)
      3. 6.4.3 Power On Reset (VDD < V(POR))
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Input and Output Configurations
      2. 7.1.2 Immunity to Input Pin Voltage Transients
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Resistor Divider Selection
        2. 7.2.2.2 Pullup Resistor Selection
        3. 7.2.2.3 Input Supply Capacitor
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

7.2.2.1 Resistor Divider Selection

The resistor divider values and target threshold voltage can be calculated by using Equation 1 to determine VMON(UV).

Equation 1. GUID-802B58EA-7893-4106-8A93-33E799196B28-low.gif

where

  • R1 and R2 are the resistor values for the resistor divider on the SENSE pin
  • VMON(UV) is the target voltage at which an undervoltage condition is detected

Choose an RTOTAL ( = R1 + R2) so that the current through the divider is approximately 100 times higher than the input current at the SENSE pin. Use resistors with high values to minimize current consumption (as a result of low input bias current) without adding significant error to the resistive divider. For details on sizing input resistors, refer to application report SLVA450, Optimizing Resistor Dividers at a Comparator Input, available for download from www.ti.com.