SLVSFW1 December   2025 TPS1HC120-Q1

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 Switching Characteristics
    7. 6.7 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 ORing of EN and EN_AUX
      2. 7.3.2 Inductive-Load Switching-Off Clamp
      3. 7.3.3 Full Protections and Diagnostics
        1. 7.3.3.1  Programmable Current Limit
        2. 7.3.3.2  Short-Circuit and Overload Protection
          1. 7.3.3.2.1 Capacitive Charging
        3. 7.3.3.3  On-state Open-Load Detection
        4. 7.3.3.4  Reverse-Polarity and Reverse Battery Protection
        5. 7.3.3.5  Thermal Protection Behavior
        6. 7.3.3.6  UVLO Protection
        7. 7.3.3.7  Loss of GND Protection
        8. 7.3.3.8  Loss of Power Supply Protection
        9. 7.3.3.9  Reverse Current Protection
        10. 7.3.3.10 Protection for MCU I/Os
    4. 7.4 Device Functional Modes
      1. 7.4.1 Working Mode
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Detailed Design Procedure
        1. 8.2.1.1 Dynamically Changing Current Limit
        2. 8.2.1.2 AEC Q100-012 Test Grade A Certification
        3. 8.2.1.3 EMC Transient Disturbances Test
      2. 8.2.2 Power Dissipation Calculation
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Examples
        1. 8.4.2.1 Without a GND Network
        2. 8.4.2.2 With a GND Network
  10. 9 Device and Documentation Support
    1. 9.1 Third-Party Products Disclaimer
    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

7.3.3.4 Reverse-Polarity and Reverse Battery Protection

Reverse-polarity, commonly referred to as reverse battery, occurs when the ground of the device goes to the battery potential, VGND = VBAT, and the supply pin goes to ground, VBB = 0V. In this case, if the EN pin has a path to the "ground" plane, then the FET will turn on (with on-resistance RON(REV))to lower the power dissipation through the main channel and prevent current flow through the body diode. It is important to note that the resistor/diode ground network (if there is not a central blocking diode on the supply) must be present for the device to protect itself during a reverse battery event.

TPS1HC120-Q1 Reverse Battery Circuit Figure 7-9 Reverse Battery Circuit

For more external protection circuitry information, see Reverse Current Protection. See the fault truth table for more details.