Part Number:TPS60403-Q1
Tool/software:TINA-TI or Spice Models
SGLS246B –JUNE 2004–REVISED OCTOBER 2016 Page11 8.3.1 Charge-Pump Output Resistance
Formula (1) is described how important factors are existing for solving the Ro.
I can select Cfly and also ESRcfly and ESRco in my design from information of Capacitor's manufacture.
Probably user will be making the spice model of fosc by reading these graph Fig6 and Fig14 in data sheet.
But, Rswitch are unknown because these does not have any specification and description in the data sheet.
Thar data sheet says that Rswitch is important, but does not clarify how many the values are.
If the data sheet describes the model number of the capacitor used for Cfly, it will be possible to back calculate the value of Rswitch.
However, the model number of Cfly used to evaluate the characteristics of Ro in the data sheet is unknown.