ADP1853 power-up simPE model

Hi Osamu,

Thanks for testing for the simulation model. The ADP1853 is one of the parts whose actual start up behavior is really hard to model, e.g. the internal comp voltage clamp level changes during startup. That’s why there is no Start-Up simulation option built in the ADP1853 design tool. Whether Vout ramps up monotonically or has a “flat voltage” during start up depends on many factors:  Cout, load, input/output voltage and so on, and usually it won’t affect the application as long as the design is stable.

It is good to order an Evaluation board to test if you want to know your actual design startup performance. Probing the voltage on the SS and Comp pin as well when you are doing the test helps you get a better insight on soft start of the this part.

Best regards,

Hong

Hi Osamu,

Thanks for testing for the simulation model. The ADP1853 is one of the parts whose actual start up behavior is really hard to model, e.g. the internal comp voltage clamp level changes during startup. That’s why there is no Start-Up simulation option built in the ADP1853 design tool. Whether Vout ramps up monotonically or has a “flat voltage” during start up depends on many factors:  Cout, load, input/output voltage and so on, and usually it won’t affect the application as long as the design is stable.

It is good to order an Evaluation board to test if you want to know your actual design startup performance. Probing the voltage on the SS and Comp pin as well when you are doing the test helps you get a better insight on soft start of the this part.

Best regards,

Hong