SLVSED2C December   2017  – November 2019 TVS0500

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Footprint Comparison
      2.      Voltage Clamp Response to 8/20 µs Surge Event
  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 - JEDEC
    3. 7.3 ESD Ratings - IEC
    4. 7.4 Recommended Operating Conditions
    5. 7.5 Thermal Information
    6. 7.6 Electrical Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
    4. 8.4 Reliability Testing
    5. 8.5 Device Functional Modes
      1. 8.5.1 Protection Specifications
      2. 8.5.2 Minimal Derating
      3. 8.5.3 Transient Performance
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Configuration Options
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

9.2.2 Detailed Design Procedure

If the TVS0500 is in place to protect the device, during a surge event the voltage will rise to the breakdown of the diode at 7.9 V, and then the TVS0500 will turn on, shunting the surge current to ground. With the low dynamic resistance of the TVS0500, large amounts of surge current will have minimal impact on the clamping voltage. The dynamic resistance of the TVS0500 is around 30 mΩ, which means 30 A of surge current will cause a voltage raise of 30 A × 30 mΩ = 0.9 V. Because the device turns on at 7.9 V, this means the LDO input will be exposed to a maximum of 7.9 V + 0.9 V = 8.8 V during surge pulses, well within the absolute maximum input voltage. This ensures robust protection of your circuit.

The small size of the device also improves fault protection by lowering the effect of fault current coupling onto neighboring traces. The small form factor of the TVS0500 allows the device to be placed extremely close to the input connector, lowering the length of the path fault current will take through the system compared to larger protection solutions.

Finally, the low leakage of the TVS0500 will have low input power losses. At 5 V, the device will see typical 70 pA leakage for a constant power dissipation of less than 1 nW, a negligible quantity that will not effect overall efficiency metrics or add heating concerns.