Dear, All
Customers are considering using LM 20333.
They want to make the output voltage variable, and are considering using the SS/TRK pin.
They do not want to enter discontinuous mode because they want to make the output voltage ripple small and because the voltage adjustment range is wide.
In the data sheet P11 'PRE - BIAS STARTUP CAPABILITY', the following is written.
- During start up the LM 20333 will not sink current until the soft-start voltage exceeds the voltage on the FB pin.
Please let me know the condition to return to the above mode once the FB voltage exceeds the reference voltage.
We believe that there is no problem if the input voltage is stable, only when the protection operation and the EN pin are off.
Thanks, Masami M.
