SLVAFQ0 October   2025 TPS61299

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Start-up
    1. 2.1 Body Diode Pass
    2. 2.2 Pre-Charge
    3. 2.3 Down Mode
  6. 3Output Short Protection
    1. 3.1 Continuous Reboot
      1. 3.1.1 Continuous Reboot by Pre-charge
      2. 3.1.2 Continuous Reboot by Down Mode
    2. 3.2 Hiccup Reboot
      1. 3.2.1 Hiccup Reboot by Pre-charge
      2. 3.2.2 Hiccup Reboot by Down Mode
    3. 3.3 Boost Converter Short-Circuit Protection Behavior Summary
  7. 4Boost Converter Start-Up Behavior Summary
  8. 5References

3 Output Short Protection

Another Vin > Vout situation happens when output shorts or suffers from voltage drop when current limit activates. Some devices can stay in start-up procedure continuously when Vout stays below Vin. These devices restart instantly when the short circuit releases. Other parts shut down and try rebooting intermittently until successful (called hiccup operation). This chapter introduces output short protection strategies used on TI synchronous boost devices.