SLVSCE9D June   2014  – October  2017 TPS25942A , TPS25942L , TPS25944A , TPS25944L

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 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 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1  Enable and Adjusting Undervoltage Lockout
      2. 9.3.2  Overvoltage Protection (OVP)
      3. 9.3.3  Hot Plug-In and In-Rush Current Control
      4. 9.3.4  Overload and Short Circuit Protection
        1. 9.3.4.1 Overload Protection
        2. 9.3.4.2 Short Circuit Protection
        3. 9.3.4.3 Start-Up With Short on Output
        4. 9.3.4.4 Constant Current Limit Behavior During Overcurrent Faults
      5. 9.3.5  Reverse Current Protection
      6. 9.3.6  FAULT Response
      7. 9.3.7  Current Monitoring
      8. 9.3.8  Power Good Comparator
      9. 9.3.9  IN, OUT and GND Pins
      10. 9.3.10 Thermal Shutdown
    4. 9.4 Device Functional Modes
      1. 9.4.1 Diode Mode
      2. 9.4.2 Shutdown Control
      3. 9.4.3 Operational Differences Between the TPS25942 and TPS25944
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Step by Step Design Procedure
        2. 10.2.2.2 Programming the Current-Limit Threshold: R(ILIM) Selection
        3. 10.2.2.3 Undervoltage Lockout and Overvoltage Set Point
        4. 10.2.2.4 Programming Current Monitoring Resistor—RIMON
        5. 10.2.2.5 Setting Output Voltage Ramp Time (tdVdT)
          1. 10.2.2.5.1 Case1: Start-Up Without Load: Only Output Capacitance C(OUT) Draws Current During Start-Up
          2. 10.2.2.5.2 Case 2: Start-Up With Load: Output Capacitance C(OUT) and Load Draws Current During Start-Up
        6. 10.2.2.6 Programing the Power Good Set Point
        7. 10.2.2.7 Support Component Selections—R6, R7 and CIN
      3. 10.2.3 Application Curves
    3. 10.3 System Examples
      1. 10.3.1 Active ORing (Auto-Power Multiplexer) Operation
        1. 10.3.1.1 N+1 Power Supply Operation
        2. 10.3.1.2 Priority Power MUX Operation
        3. 10.3.1.3 Priority MUXing With Almost Equal Rails (VIN1 ~ VIN2)
        4. 10.3.1.4 Reverse Polarity Protection
  11. 11Power Supply Recommendations
    1. 11.1 Transient Protection
    2. 11.2 Output Short-Circuit Measurements
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
    2. 13.2 Documentation Support
      1. 13.2.1 Related Documentation
    3. 13.3 Related Links
    4. 13.4 Receiving Notification of Documentation Updates
    5. 13.5 Community Resources
    6. 13.6 Trademarks
    7. 13.7 Electrostatic Discharge Caution
    8. 13.8 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

4 Revision History

Changes from C Revision (January 2017) to D Revision

Changes from B Revision (October 2017) to C Revision

Changes from A Revision (March 2015) to B Revision

Changes from * Revision (June 2014) to A Revision

  • Changed Features From: UL2367 Recognition Pending To: UL 2367 Recognized, RILIM ≥ 20 kΩ (4.81 A max), File No. 169910Go
  • Changed text in the Description From: FLT and ENBLK pins To: FLT and DMODE pins.Go
  • Deleted Note "Product Preview" from the Device Information tableGo
  • Changed Pin 1 From ENBLK To: DMODE throughout the data sheetGo
  • Changed ENBLK To: DMODE in the Pin Functions table and updated the DESCRIPTION Go
  • Moved the Storage Temperature From the Handling Ratings table To Absolute Maximum Ratings table Go
  • Changed the Handling Ratings table To: ESD Ratings table Go
  • Changed DIODE MODE INPUT (ENBLK): ACTIVE LOW To: DIODE MODE INPUT (DMODE): ACTIVE HIGH in the Electrical CharacteristicsGo
  • Added Test Condition to I(LIM): "R(ILIM) = 20 kΩ" in the Electrical CharacteristicsGo
  • Changed Test Condition in I(LIM) From: "ENBLK = High; Diode Mode" To: "DMODE = High; Non-ideal Diode Mode" in the Electrical CharacteristicsGo
  • Changed "DIODE MODE INPUT: ACTIVE LOW (ENBLK)" To: DIODE MODE INPUT: ACTIVE HIGH (DMODE)" in the Timing RequirementsGo
  • Changed Figure 22.Go
  • Added condition R(ILIM) = 17.8 KΩ to Figure 39 and Figure 40Go
  • Changed Figure 43. Added Figure 44, Figure 45, and Figure 46Go
  • Changed Figure 48: ENBLK To: DMODE and Diode Mode To: Non-Ideal Diode ModeGo
  • Changed Figure 49: ENBLK To: DMODE and Diode Mode To Non-Ideal Diode ModeGo
  • Changed Equation 6 to include I(IMON_OS)Go
  • Change text in Diode Mode From:" ENBLK...active low terminal" To: "DMODE ...active high terminal"Go
  • Changed text in the last sentence of Diode Mode From: "In this mode, the overload current..." To:"In this mode, the circuit breaker functionality.."Go
  • Added the NOTE to Application and ImplementationGo
  • Added Note A to Figure 60Go
  • Changed Equation 37 From: V(IN) x I(LOAD) To: V(IN) + I(LOAD)Go