For TPS563203, this is a Buck chip. We can know Vout=Vin*D (duty cycle) through the principle of Buck circuit. The output voltage range in the Datesheet is 4.2-17V, and the maximum duty cycle can reach 95%. If the input is 17V, the maximum duty cycle is 95%, and the maximum output voltage can reach 16V, but why the maximum output voltage of our chip is only Can go to 7V