SBVS105F September   2009  – October 2018 TPS386000 , TPS386040

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      TPS386000 Typical Application Circuit: Monitoring Supplies for an FPGA
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 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 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagrams
    3. 8.3 Feature Description
      1. 8.3.1 Voltage Monitoring
      2. 8.3.2 Manual Reset
      3. 8.3.3 Watchdog Timer
      4. 8.3.4 Reset Output
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Undervoltage Detection
      2. 9.1.2 Undervoltage and Overvoltage Detection
      3. 9.1.3 Sensing a Negative Voltage
      4. 9.1.4 Reset Delay Time
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
        1. 12.1.1.1 Evaluation Modules
        2. 12.1.1.2 Spice Models
      2. 12.1.2 Device Nomenclature
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Related Links
    4. 12.4 Community Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

9.1.3 Sensing a Negative Voltage

By using voltage reference output VREF, the SVS-4 comparator can monitor negative voltage or positive voltage lower than 0.4V. Figure 34 shows this usage in an application circuit. SVS-4 monitors the positive and negative voltage power rail (for example, 15-V and –15-V supply to an op amp) and the RESET4 or RESET4 output status continues to be as described in Table 4. RS42H is located at higher voltage position than RS42L. The threshold voltage calculations are shown in Equation 6 and Equation 7.

Equation 6. VMON(4, NEG) = (1+RS41H/RS41L) × 0.4 (V)
Equation 7. VMON(4, POS) = (1+RS42L/RS42H) × 0.4 – RS42L/RS42H × VREF = 0.4 – [RS42L/RS42H × 0.8 (V)]
TPS386000 TPS386040 ai_neg_sense_bvs105.gifFigure 34. SVS4: Negative Voltage Sensing