SNVSB04B March   2019  – June 2020 TLV4021 , TLV4031 , TLV4041 , TLV4051

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
    1.     Device Images
      1.      TLV40x1 Configurations
  4. Revision History
  5. Pin Configuration and Functions
    1.     DSBGA Package Pin Functions
    2.     SOT-23 Pin Functions
  6. Specifications
    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 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power ON Reset (POR)
      2. 7.4.2 Input (IN)
      3. 7.4.3 Switching Thresholds and Hysteresis (VHYS)
      4. 7.4.4 Output (OUT)
  8. Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Monitoring (V+)
      2. 8.1.2 Monitoring a Voltage Other than (V+)
      3. 8.1.3 VPULLUP to a Voltage Other than (V+)
    2. 8.2 Typical Application
      1. 8.2.1 Under-Voltage Detection
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Additional Application Information
        1. 8.2.2.1 Pull-up Resistor Selection
        2. 8.2.2.2 Input Supply Capacitor
        3. 8.2.2.3 Sense Capacitor
    3. 8.3 What to Do and What Not to Do
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Related Links
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

Monitoring a Voltage Other than (V+)

Some applications monitor rails other than the one that is powering the comparator. In these applications the resistor divider used to set the desired threshold is connected to the rail that is being monitored.

TLV4021 TLV4031 TLV4041 TLV4051 Monitor.gifFigure 42. Monitoring a Voltage Other than the Supply

The TLV40x1Ry can monitor a voltage greater than the maximum (V+) with the use of an external resistor divider network. Likewise, the TLV40x1 can monitor voltages as low as the internal reference voltage (0.2 V, 0.5 V, or 1.2 V). The TLV40x1Ry also has the advantage of being able to monitor high impedance sources since the input bias current of the input (IN) is low. This provides an advantage over voltage supervisors that can only monitor the voltage rail that is powering them. Supervisors configured in this fashion have limitations in source impedance and minimum sensing voltage.