SLVAFO4 august   2023 TPS61299

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Overview
  5. 2Load Connected to Input Voltage
    1. 2.1 Body Diode Pass (TPS61288)
    2. 2.2 Force Pass Through (TPS61253)
    3. 2.3 Bypass (TPS61291)
    4. 2.4 Summary
  6. 3Load Disconnected to Input Voltage
    1. 3.1 Synchronous HSD FET With Switchable Body Diode (TPS61299)
    2. 3.2 Extra ISO FET to Cut-Off Leakage Path
  7. 4Summary
  8. 5References

4 Summary

This application note discussed different behaviors of boost converters during shutdown. In always-on systems, devices with force pass through and bypass functions should be considered to maintain high efficiency. Consider devices with a load disconnection function when the load is not powered by the device and the system is sensitive to power loss during shutdown. If short protection function is needed, use devices with true disconnection function.