SLVSHA1D September   2024  – July 2026 TPS1685

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 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 Logic Interface
    7. 6.7 Timing Requirements
    8. 6.8 Switching Characteristics
    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  Undervoltage Protection
      2. 7.3.2  Insertion Delay
      3. 7.3.3  Overvoltage Protection
      4. 7.3.4  Inrush Current, Overcurrent, and Short-Circuit Protection
        1. 7.3.4.1 Slew Rate (dVdt) and Inrush Current Control
          1. 7.3.4.1.1 Start-Up Time Out
        2. 7.3.4.2 Steady-State Overcurrent Protection (Circuit-Breaker)
        3. 7.3.4.3 Active Current Limiting During Start-Up
        4. 7.3.4.4 Short-Circuit Protection
      5. 7.3.5  Analog Load Current Monitor (IMON)
      6. 7.3.6  Mode Selection (MODE)
      7. 7.3.7  Parallel Device Synchronization (SWEN)
      8. 7.3.8  Stacking Multiple eFuses for Unlimited Scalability
        1. 7.3.8.1 Current Balancing During Start-Up
      9. 7.3.9  Analog Junction Temperature Monitor (TEMP)
      10. 7.3.10 Overtemperature Protection
      11. 7.3.11 Fault Response and Indication (FLT)
      12. 7.3.12 Power Good Indication (PG)
      13. 7.3.13 Output Discharge
      14. 7.3.14 FET Health Monitoring
      15. 7.3.15 Single Point Failure Mitigation
        1. 7.3.15.1 IMON Pin Single Point Failure
        2. 7.3.15.2 IREF Pin Single Point Failure
        3. 7.3.15.3 ITIMER Pin Single Point Failure
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Single Device, Standalone Operation
      2. 8.1.2 Multiple Devices, Parallel Connection
    2. 8.2 Typical Application: 54V Power Path Protection in Data Center Servers
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
      1. 8.3.1 Transient Protection and Other Design Considerations
      2. 8.3.2 Output Short-Circuit Measurements
    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 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    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

10 Revision History

Changes from Revision C (August 2025) to Revision D (July 2026)

  • Added SFT_SEL pulldown connection in simplified schematicGo
  • Added information regarding leaving the SFT_SEL floating Go
  • Added "Input supply hotplug slew rate" specification in the Absolute Maximum Ratings tableGo
  • Added "dVin/dt" specification in the Recommended Operating Conditions tableGo
  • Changed RSFT_SEL values in the "SHORT-CIRCUIT PROTECTION" section in the Electrical Characteristics tableGo
  • Changed "Scalable fast trip Current (inrush)" from "2" to "2xIstart-up peak" in the Electrical Characteristics tableGo
  • Removed the maximum limit for "Quick Output Discharge pull-down current" in the Electrical Characteristics tableGo
  • Added y-axis title IDS(A) in Allowed Operating Area (AOA) in startup plotGo
  • Changed RSFT_SEL values in Device Functional Modes table Based on Resistor on SFT_SEL PinGo
  • Added note to Stacking Multiple eFuses for Unlimited ScalabilityGo
  • Changed RSFT_SEL values in Device Functional Modes table Based on Resistor on SFT_SEL PinGo
  • Updated SFT_SEL connection in Single Device, Standalone Operation Go
  • Updated SFT_SEL connection in Device connected in Parallel for High Current CapabilityGo
  • Updated SFT_SEL connection in 54V, 4.3kW Power Path Protection CircuitGo
  • Updated Power Supply RecommendationsGo
  • Updated section title from Transient Protection to Transient Protection and Other Design ConsiderationsGo
  • Updated SFT_SEL connection in Circuit Implementation with Optional Protection ComponentsGo

Changes from Revision B (May 2025) to Revision C (August 2025)

  • Changed RITMR min from 7Ω to 5Ω in the Electrical Characteristics SectionGo
  • Changed ITIMER max ratio from 0.78 to 0.97 in the Electrical Characteristics sectionGo
  • Changed GIMON(ACS) min from 18.02µA/A to 17.24µA/A in the Electrical Characteristics  SectionGo
  • Changed GIMON(ACS) max from 18.71µA/A to 19.84µA/A in the Electrical Characteristics SectionGo
  • Updated RON(GHI) typ value from 3.6mΩ to 3.8mΩ in the Electrical Characteristics SectionGo
  • Changed Test condition from VDS > VDSCOMP to IOUT↓ to VDS > VDSCOMP to SWEN↓ for TFFT Test in Timing Requirements Section Go
  • Changed typ of QOD enable  time from 6ms to 16µs in Timing Characteristics Section Go
  • Changed typ data of Cdvdt = 68nF to Cdvdt = openGo
  • Fixed the Startup AOA graph by removing the DC labelGo