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PMIC PF3001: value of Vin (min), when Vout is 3.3V

Question asked by Yuri Muhin Employee on Dec 25, 2019
Latest reply on Jan 5, 2020 by G.w. Sun



   PMIC PF3000 Datasheet contains the following comments regarding voltage drop

for the SW2:

  The higher output voltages available depend on the voltage drop in the conduction path as given

by the following equation: (VSW2IN - VSW2) = ISW2* (DCR of Inductor +RONSW2P + PCB trace



 The similar statement, which allows to estimate minimal input voltage, is also for the SW3;

but there is no such equation for the SW1. What are considerations for the SW1?